By an invention probably due to Humfray Cole and published in 1 578 by William Bourne in his Inventions and Devices, it was proposed to register a ship's speed by means of a "little small close boat," with a wheel, or wheels, and an axle-tree to turn clockwork in the little boat, with dials and pointers indicating fathoms, leagues, scores of leagues and hundreds of leagues.
As the teams came to a halt, the rasp of leather against sandy wheels assured her that the other wagons were following suit.
As the big wheels turned, they tossed sand up and over the rim.
The wheels were already in motion.
I love my wheeled wonder, my palace on wheels, but it's unique and easily remembered.
The wheels of the Conestoga wagons had been modified with wide rims to even the load on the sand.
I've purchased a home on wheels for my journeys.
They fastened each of these wheels to the end of an iron rod which they passed through the boat from side to side.
She talks forward of the spring; seeing the flowers and the young people riding on these new wheels called bicycles, but I think to myself she'll not last the winter.
The postilion started, the carriage wheels rattled.
Katie hit the accelerator and the wheels spun wildly, instantly coating Carmen and Alex with mud.
All her skills were occupied simply keeping all four wheels on the ground.
Wheels crunched on gravel as a car stopped in her drive.
A blacksmith in Gravette was making the wheels, but the rest of the buggy was complete, right down to the leather seats.
The man lifted his hands gently from the trunk, and the rear wheels of the car lifted a few inches from the ground.
But in spite of her lack of beauty, Ethel Rosewater was hell on wheels in bed.
The wheels finally came in!
"Money may keep this whole world turning, but love greases the wheels," she quipped in reverse.
She released his arm only to grab it again as one of the buggy wheels dropped into a pothole.
I parked my home on wheels under a tree and unbound my reluctant guest.
Another opportunity will present itself I'm sure, but not where I might be identified with my perfect house on wheels and electric bicycle.
But I am a patient man and the sun is shining, the brook that fronts my home on wheels is singing.
The wheels symbolize divine omniscience and control, and the whole vision represents the coming of Yahweh to take up his abode among the exiles.
Sarah loved a project; he could see the wheels turning.
He kept on, planning and thinking and working, until at last he succeeded in making a boat with paddle wheels that could be run by steam.
In the first instance he proposed to place the guiding wheels outside the bearing wheels, and the Nanpantan line was laid on this plan with a width of 5 ft.
The man who explains the movement of the locomotive by the smoke that is carried back has noticed that the wheels do not supply an explanation and has taken the first sign that occurs to him and in his turn has offered that as an explanation.
I am thankfully ensconced in my perfect house on wheels, mended in body but seething in mind.
She stomped on the accelerator and for a moment the wheels spun gravel.
Her mental wheels began to move again as she grappled with not only what he'd done, but why Andre and Gabriel – who knew the truth long before she did – chose now to have it revealed to her.
Fred O'Connor's eyes lit up and his wheels began to spin.
She was hell on wheels, moaning and carrying on something wicked!
The first sign of the ground Dean spotted was a rain puddle reflecting the glow from the lights of the plane as the wheels touched the runway—one, two, three times before the tired aircraft glided to the taxiway.
With all other thoughts lulled from his mind by the steady cadence of the wheels, he moved step by step through every facet of the Byrne case.
I feel like I've been on my first solo flight for the last three years, but I can't seem to get my wheels off the runway.
running wheels which enable the end carriages to travel on the longitudinal gantry girders or runway, and the crab or jenny, which carries the hoisting mechanism, and moves across the span on FIG.
The wheels, called naoura, are of the most primitive construction, made of rough branches of trees, with palm leaf paddles, rude clay vessels being slung on the outer edge to catch the water, of which they raise a prodigious amount, only a comparatively small part of which, however, is poured into the aqueducts on top of the dams. These latter are exceedingly picturesque, often consisting of a series of well-built Gothic arches, and give a peculiar character to the scenery; but they are also great impediments to navigation.
The log should be washed in fresh water when practicable, to prevent oxidization of the wheels, and be lubricated with suitable oil through a hole in the case.
Strong worms and wheels are substituted for the light clockwork.
deep to control extra guiding wheels which were to be of somewhat larger diameter than the bearing wheels and to be affixed to them.
in diameter, with a stroke of 162 in., and the driving wheels, which were placed in front under the funnel, were 4 ft.
I pass farm country, for miles and miles as I travel in my home on wheels.
Brandon Westlake remained under his colorful cover until he was sure the Deans were with wheels.
Then she added, Every volunteer fire buck and EMT has a noise on his wheels.
He repeated her comment about the Porsche, "Nice wheels."
Yeah, this is one slick pair of wheels.
Wheels of understanding began turning but before he could collect his thoughts, Randy returned to the room.
I didn't have wheels and Byrne offered to take me to Blooming Grove.
She sounds like one of those motorcycles with four wheels.
The ox-wagons with their solid wheels, and the curious water-wheels of brushwood with earthenware pots tied on to them and turned by a blindfolded donkey, are picturesque.
Immediately outside the city limits in 1905 there were many large manufactories, including the repair shops of the Southern railroad; iron and steel, car wheels and cotton-oil were among the products of the suburban factories.
Jib cranes can be subdivided into fixed cranes and portable cranes; in the former the central post or pivot is firmly fixed in a permanent position, while in the latter the whole crane is mounted on wheels, so that it may be transported from place to place.
The toothed wheels give a slightly better efficiency, but the worm gear is somewhat smoother in its action and entirely silent; the noise of gearing can, however, be considerably reduced by careful machining of the teeth, as is now always done, and also by the use of pinions made of rawhide leather or other non-resonant material.
Obviously, nearly every kind of crane can be made portable by mounting it on a carriage, fitted with wheels; it is even not unusual to make the Portable Scottish derrick portable by using three trucks, one under the mast, and the others under the two back legs.
4), but the foundation bed is mounted on a truck which is carried on railway or road wheels.
From the lower flange of a suspended !; runway, made of a single I section, run wheels, from the axles of which the transporter is suspended.
In time it became a common practice to cover them with a thin sheathing or plating of iron, in order to add to their life; this expedient caused more wear on the wooden rollers of the wagons, and, apparently towards the middle of the 18th century, led to the introduction of iron wheels, the use of which is recorded on a wooden railway near Bath in 1734.
The Rocket possessed the three elements of efficiency of the modern locomotive - the internal water-surrounded fire-box and the multitubular flue in the boiler; the blast-pipe, by which the steam after doing its work in the cylinders was exhausted up the chimney, and thus served to increase the draught and promote the rapid combustion of the fuel; and the direct connexion of the steam cylinders, one on each side of the engine, with the two driving wheels mounted on one axle.
After the success of the Rocket, the Stephensons received orders to build seven more engines, which were of very similar design, though rather larger, being four-wheeled engines, with the two driving wheels in front and the cylinders behind; and in October 1830 they constructed a ninth engine, the Planet, also for the Liverpool & Manchester railway, which still more closely resembled the modern type, since the driving wheels were placed at the fire-box end, while the two cylinders were arranged under the smoke-box, inside the frames.
It had a vertical boiler, and was carried on four wheels all coupled, the two cylinders being placed in an inclined position and having a bore of about 6 in.
Baldwin, the founder of the famous Baldwin Locomotive Works in Philadelphia, built his first engine, Old Ironsides, for the Philadelphia, Germantown & Morristown railroad; first tried in November 1832, it was modelled on Stephenson's Planet, and had a single pair of driving wheels at the firebox end and a pair of carrying wheels under the smoke-box.
While braking, spragging, or chocking wheels 15 627 6.
„ wheels 16.
The theoretical limit is about i in 16; between I in 20 and 1 in 16 a steam locomotive depending on the adhesion between its wheels and the rails can only haul about its own weight.
Blenkinsop placed the teeth on the outer side of one of the running rails, and his reason for adopting a rack was the belief that an engine with smooth wheels running on smooth rails would not have sufficient adhesion to draw the load required.
This sliding movement is resisted by placing a check rail on the inner side of the inner rail, to take the lateral thrust of the wheels on that side.
The gauge of a railway is the distance between the inner edges of the two rails upon which the wheels run.
14), are tapered to a fine point or tongue, and rigidly connected together at such a distance apart that when one of the points is pressed against the outer or "stock" rail (a) of either the siding or the main line there is sufficient space between the other tongue and the other stock rail to permit the free passage of the flanges of the wheels on one side of the train, while the flanges on the other side find a continuous path along the other switch rail and thus are deflected in the desired direction.
In whatever form energy is produced and distributed to the train it ultimately appears as mechanical energy applied to turn one or more axles against the resistance to their rotation imposed by the weight on the wheels and the motion of the train.
Hence if all the energy supplied to the train is utilized at one axle there is the fundamental relation RV (I) Continuing the above arithmetical illustration, if the wheels to the axle of which the torque is applied are 4 ft.
The fundamental condition governing the design of all tractive machinery is that the wheels belonging to the axles to which torque is applied shall roll along the rails without slipping, and exert a tractive force on the train.
This couple, we may assume, will be equally divided between the two wheels, so that the torque acting on each will be T.
Assuming the wheels to roll along the rail without slipping, this couple will be equivalent to the couple formed by the equal opposite and parallel forces, F 1 acting in the direction shown, from the axle-box on to the frame, and F 1 =µ0, acting along the rail.
The practical effect of this opposite couple is slightly to tilt the frame and thus to redistribute slightly the weights on the wheels carrying the vehicle.
The maximum weight which one pair of wheels are usually allowed to carry on a first-class track is from 18 to 20 tons.
value of the tractive force is required than this provides for, namely from 4 to 5 tons, the driving-wheels are coupled to one or more pairs of heavily loaded wheels, forming a class of what are called " coupled engines " in contradistinction to the " single engine " with a single pair of loaded driving-wheels.
Every axle of an electric locomotive may thus be subjected to a torque, and the large weight which must be put on one pair of wheels in order to secure sufficient adhesion when all the driving is done from one axle may be distributed through as many pairs of wheels as desired.
Such an arrangement would be ideally perfect from the point of view of the permanent-way engineer, because it would then be possible to distribute the whole of the load uniformly between the wheels.
To obtain the tractive force the weight on the coupled wheels must be about five times this amount - that is..
7 he torque exerted on the driving-axle by the steam engine just at starting may be that due to the full boiler pressure acting in the cylinders, but usually the weight on the coupled wheels is hardly sufficient to enable advantage to be taken of the full boiler pressure, and it has to be throttled down by the regulator to prevent slipping.
Hence, if p is the maximum value of the mean effective pressure corresponding to about 85% of the boiler pressure,, uW = pd 2 le /D (26) is an expression giving a relation between the total weight on the coupled wheels, their diameters and the size of the cylinder.
Assuming that the frictional resistance at the rails is given by the weight on the wheels, the total weight on the driving-wheels necessary to secure sufficient adhesion to prevent slipping must be at least 8.3 X5 =41.5 tons.
When the road leads the train up an incline, however, the tractive force must be increased, so that the need for coupled wheels soon arises if the road is at all a heavy one.
The drivingwheels are coupled to a pair of trailing wheels.
The low-pressure cylinders drive on the leading crank-axle with cranks at right angles, the highpressure cylinders driving on the trailing wheels.
A highand low-pressure cylinder are cast together, and the piston-rods belonging to them are both coupled to one cross-head which is connected to the driving-wheels, these again being coupled to other wheels in the usual way.
The revolving masses are truly balanced by balance weights placed between ' the spokes of the wheels, or sometimes by prolonging the crank-webs and forming the prolongation into balance weights.
It is also the custom to balance a proportion of the reciprocating masses by balance weights placed between the spokes of the wheels, and the actual balance weight seen in a driving-wheel is the resultant of the separate weights required for the balancing of the revolving parts and the reciprocating parts.
When the four cranks are placed with two pairs at 180°, the pairs being at 90°, the forces are balanced without the introduction of a hammer-blow, but there remain large unbalanced couples, which if balanced by means of revolving weights in the wheels again reintroduce the hammerblow, and if left unbalanced tend to make the engine oscillate in a horizontal plane at high speed.
A convenient way of describing any type of engine is by means of numerals indicating the number of wheels - (I) in the group of wheels supporting the leading or chimney end, (2) in the group of coupled wheels, and (3) in the group supporting the trailing end of the engine.
Thus 4-4-2 represents a bogie engine with four-coupled wheels and one pair of trailing wheels, the wellknown Atlantic type; 4-2-2 represents a bogie engine with a single pair of driving-wheels and a pair of trailing wheels; 0-4-4 represents an engine with four-coupled wheels and a trailing bogie, and 4-4-o an engine with four-coupled wheels and a leading bogie.
Engines of this class, with 78-inch driving wheels and the leading axle fitted with Webb's radial axle-box, for many years did excellent work on the London & North-Western railway.
Its critics, however, accuse it of lack of stability, and assert that the use of large leading wheels as drivers results in rigidity and produces destructive strains on the machinery and permanent way.
Their boilers are of relatively large proportions for the train weight and average speed, and the driving wheels of small diameter, a large proportion of their total weight being " adhesive."
for a simple two-cylinder engine, and cylinder volume is slightly increased with the necessary accompaniment of heavier loads on the coupled wheels to give the necessary adhesion.
The first railway carriages in England had four wheels with two axles, and this construction is still largely employed, especially for short-distance trains.
Later, when increased length became desirable, six wheels with Passenger g g three axles came into use; vehicles of this kind were carria es.
The majority of the wagons referred to above are comparatively short, are carried on four wheels, and are often made of wood.
American cars, on the other hand, have long bodies mounted on two swivelling bogie-trucks of four wheels each, and are commonly constructed of steel.
The priest-prophet's keen eye for detail, manifested in the elaborate vision of the wheels and living creatures (Ezek.
The ox-carts are often made with solid wheels, for greater strength.
as to the Boo chapels on wheels in the nomadic host), are based on fact.
Among the manufactures are charcoal, pig-iron, car wheels and general castings at Lime Rock, cutlery at Lakeville, and knife-handles and rubber brushes at Salisbury.
These have two wheels of 81 to 9 ft.
The most important manufactures are iron and steel, carriage hardware, electrical supplies, bridges, boilers, engines, car wheels, sewing machines, printing presses, agricultural implements, and various other commodities made wholly or chiefly from iron and steel.
Besides the ordinary shell money, there is a sort of stone coinage, consisting of huge calcite or limestone discs or wheels from 6 in.
Amasia has extensive orchards and fruit gardens still, as in Ibn Batuta's time, irrigated by water wheels turned by the current of the river; and there are steam flourmills.
These are long frames on four wheels, with a series of seats like a section of a theatre gallery.
The spindles of cutting wheels are driven by steam or electric power.
The wheels for making deep cuts are made of iron, and are fed with sand and water.
The wheels range in diameter from 18 in.
Wheels of carborundum are also used.
Wheels of fine sandstone fed with water are used for making slighter cuts and for smoothing the rough surface left by the iron wheels.
Polishing is effected by wooden wheels fed with wet pumice-powder and rottenstone and by brushes fed with moistened putty-powder.
Engraving is a process of drawing on glass by means of small copper wheels.
The wheels range from 2 in.
The spindles to which the wheels are attached revolve in a lathe worked by a foot treadle.
These attachments, first invented by Jeremiah Howard, and described in the United States Patent Journal in 1858, are simply hydraulic rams fitted into the side or top caps of the mill, and pressing against the side or top brasses in such a manner as to allow the side or top roll to move away from the other rolls, while an accumulator, weighted to any desired extent, keeps a constant pressure on each of the rams. An objection to the top cap arrangement is, that if the volume or feed is large enough to lift the top roll from the cane roll, it will simultaneously lift it from the megass roll, so that the megass will not be as well pressed as it ought to be;' and an objection to the side cap arrangement on the megass roll as well as to the top cap arrangement is, that in case more canes are fed in at one end of the rolls than at the other, the roll will be pushed out farther at one end than at the other; and though it may thus avoid a breakdown of the rolls, it is apt, in so doing, to break the ends off the teeth of the crown wheels by putting them out of line with one another.
The water forced by the force-pump against the Pelton wheels returns by a waste-pipe to the tank, from which the force-pump takes it again.
These are shown with coulter and share and also with wheels, which had in earlier times been fitted to ploughs by the Greeks and also by the natives of Cis-Alpine Gaul (Pliny, Hist.
Two wheels of unequal height are commonly fitted to the front of the beam.
In the wheeled plough some of the weight and downward pull due to its action on the ground is taken by the wheels; the sliding friction is thus to some extent converted into a rolling friction, and the draught is correspondingly diminished.
The weight of these implements necessitates some provision for turning them at the headlands, and this is supplied either by a bowl wheel, enabling the plough to be turned on one side, or by a pair of wheels cranked so that they can be raised by a lever when the plough is working.
In this form of plough the frame is mounted on three wheels, one of which runs on the land, and the other two in the furrow.
The furrow wheels are placed on inclined axles, the plough beam being carried on swing links, operated by a hand lever when it is necessary to raise the plough out of the furrow.
This consists of a cast-iron pan having a shallow cylindrical bottom holding mercury, in which a wooden muller, nearly of the same shape as the inside of the pan, and armed below with several projecting blades, is made to revolve by gearing wheels.
These screws are turned from the eye-end by bevelled wheels and pinions, the latter connected with the handles a', b'.
The screw, turned by the wheels at g', acts in a toothed arc, whence, as shown in the figure, equal and opposite motion is communicated to the slides by the jointed rods v, v.
This ring runs between friction wheels and is provided with teeth on its inner periphery, and these teeth transmit motion to a pinion on a spindle having at its other end another pinion which, through an intermediate wheel, rotates the heliometer tube.
Another class of percussive coal-cutters of American origin is represented by the Harrison, Sullivan and Ingersoll-Sergeant machines, which are essentially large rock-drills without turning gear for the cutting tool, and mounted upon a pair of wheels placed so as to allow the tool to work on a forward slope.
19 a - towards the face, upon which the miner lies and controls the direction of the blow by a pair of handles at the back of the machine, which is kept stationary by wedging the wheels against a stop on the platform.
Two equal sprocket wheels Q 1, Q 2, are fastened, the one to the spring pulley, the other to the shaft.
The wheel D, keyed to the shaft overcoming the resistance to be measured, is driven from wheel N by two bevel wheels L, L, carried in a loose pulley K.
Queen Mary, unshaken in her attachment to the ancient faith and the papal monarchy, was able with the sanction of a subservient parlia ment to turn back the wheels of ecclesiastical legis lation, to restore the old religion, and to reunite the 1558.
Tilt of sights in field guns owing to the sinking of one wheel had long been recognized as a source of error, and allowed for by a rule-of-thumb correction, depending on the fact that the track of the wheels of British field artillery gun-carriages is 60", so that, for every inch one wheel is lower than the other, the whole system is turned through one degree - a_ hXl ?
The pattern is that of a true sight, that is to say, the base plate is capable of movement about two axes, one parallel to and the other at right angles to the axis of the gun, and has cross spirit-levels and a graduated elevating drum and independent deflection scale, so that compensation for level of wheels can be given and quadrant elevation.
The handle D, acting through the gear wheels E, F, G and H, turns the cogwheel K, which moves the curved rack of the cradle and tips the crucible M.
The molten metal is poured into the moulds N, which are carried on wheels running on rails Q.
The parts of the range of moulds are brought tightly together and held in position by the bars 0 and the screw P, and when one mould is filled the carrier is moved forward on its rails by wheels worked by a handle also shown in the figure.
The contents are poured by hand into moulds which are contained side by side in an iron carriage running on wheels, fig.
The power is usually transmitted through toothed wheels, each roll being driven independently in some cases, while sometimes power is applied to the lower roll only, the upper roll being coupled to it.
The coins are then gripped by a pair of india-rubber driving wheels, which force them past the rim of a thin disk with notches in its edge to fit the coins.
To this are fixed the bearings of the running wheels, fourteen on each side.
There is a dorsal interruption to the disk, in volving both trochus and cingulum and groove in this case the two halves of the disk may be developed in lobes, flower-shaped in Melicerta ringens, but often rounded and projecting like kettledrums. These give a strong impression of two crown wheels revolving in the same sense.
During this time the illusion of a wheel or wheels produced by the ciliary action of the disk had puzzled all observers.
The distortion which rails undergo in manufacture and use is incomparably less than that to which rivets are subjected, and thus rail steel may safely be much richer in carbon and hence in cementite, and therefore much stronger and harder, so as to better endure the load and the abrasion of the passing wheels.
Indeed, its carbon-content is made small quite as much because of the violence of the shocks from these wheels as because of any actual distortion to be expected, since, within limits, as the 1 0 20 24 2 32 30 4.0 4.3 4.
The annealing of such iron may occur in either of two degrees - a small one, as in making common chilled cast iron objects, such as railway car wheels, or a great one, as in making malleable cast iron.
It is used extensively for objects which require both hardness and ductility, such as rock-crushing machinery, railway crossings, mine-car wheels and safes.
Yet this very fact that it is unalterably hard has limited its use, because of the great difficulty of cutting it to shape, which has in general to be done with emery wheels instead of the usual iron-cutting tools.
There are two distinct ways of making the steel objects actually used in the arts, such as rails, gear wheels, guns, beams, &c., out of the molten steel made by the Bessemer, open hearth, or crucible process, or in an electric furnace.
Subsequently the hard top hairs are taken out as in the case of otters and beavers and the whole thoroughly cleaned in the revolving drums. The close underwool, which is of a slightly wavy nature and mostly of a pale drab colour, is then dyed by repeated applications of a rich dark brown colour, one coat after another, each being allowed to thoroughly dry before the next is put on, till the effect is almost a lustrous black on the top. The whole is again put through the cleaning process and evenly reduced in thickness by revolving emery wheels, and eventually finished off in the palest buff colour.
" Money," said Hume, " is none of the wheels of trade; it is the oil which renders the motion of the wheels more smooth and easy."
South Framingham has large manufactories of paper tags, shoes, boilers, carriage wheels and leather board; formerly straw braid and bonnets were the principal manufactures.
The actual efficiency of these wheels when used with high falls is from 80 to 86%; when used in connexion with high-pressure water in London an efficiency 1 This engine was fully described in Engineering, vol.
Pelton wheels are very sensitive to variation of load, and considerable trouble was experienced at first in securing adequate A s has now become one of 5.
Each pair of wheels is built in three storeys, and the outflow of the water is controlled by a cylindrical gate or sluice, which is moved up and down by the action of the governor.
As the pair of wheels and the big vertical shaft (which is of hollow steel 38 in.
The total upward pressure on this piston is calculated to be equal to 150,000 lb; hence the shaft-bearings are practically relieved from pressure when the wheels are running.
pipe a distance of 1800 ft., and supplies six Pelton wheels each 28 in.
The total power developed is 600 H.P., and though the load factor varies very greatly in this case, the differential type of governor used secures perfect control of the running of the wheels.
pp. 391-767, " Governing of Water Wheels."
p. 537, " A 12-Mile Transmission of Power Generated by Pelton Wheels "; vol.
Kingston's principal manufactures are tobacco, cigars and cigarettes, street railway cars and boats; other manufactures are Rosendale cement, bricks, shirts, lace curtains, brushes, motor wheels, sash and blinds.
For this mischievous and immoral alliance, which bound Denmark to the wheels of the Russian empress's chariot and sought to interfere in the internal affairs of a neighbouring state, Bernstorff was scarcely responsible, for the preliminaries had been definitely settled in his uncle's time and he merely concluded them.
(The architect being at that time also the contractor.) The chapters are -- (1) on various machines, such as scaling-ladders, windmills, &c.; (2) on windlasses, axles, pulleys and cranes for moving heavy weights, such as those used by Chersiphron in building the great temple of Diana at Ephesus, and on the discovery by a shepherd of a quarry of marble required to build the same temple; (3) on dynamics; (4) on machines for drawing water; (5) on wheels for irrigation worked by a river; (6) on raising water by a revolving spiral tube; (7) on the machine of Ctesibius for raising water to a height; (8) on a very complicated water engine, the description of which is not intelligible, though Vitruvius remarks that he has tried to make the matter clear; (9) on machines with wheels to register the distance travelled, either by land or water; (10) on the construction of scorpiones for hurling stones; (11) and (12) on balistae and catapults; (13) on battering rams and other machines for the attack of a fortress; (14) on shields (testudines) to enable soldiers to fill up the enemy's ditches; (15) on other kinds of testudines; (16) on machines for defence, and examples of their use in ancient times.
Corn is threshed by a norag, a machine resembling a chair, which moves on small iron wheels or thin circular plates fixed to axle-trees, and is drawn in a circle by oxen.
This was an ancient trade route with the Sudan, and had been used without difficulty by the reinforcements sent to Hicks Pasha in 1883, whic,h were accompanied by guns on wheels.
The Greek chariot had two wheels, and was made to be drawn by two horses; if a third or, more commonly, two reserve horses were added, they were attached on each side of the main pair by a single trace fastened to the front of the chariot, as may be seen on two prize vases in the British Museum from the Panathenaic games at Athens.
The wheels and body of the chariot were usually of wood, strengthened in places with bronze or iron; the wheels had from four to eight spokes and tires of bronze or iron.
Among the Persians, again, and more remarkably among the ancient Britons, there was a class of chariot having the wheels mounted with sharp, sickle-shaped blades, which cut to pieces whatever came in their way.
The biga itself consists of a seat resting on the axle, with a rail at each side to protect the driver from the wheels.
In late Jewish writings, more recognized than "Enoch," they are classed among the celestials with the cherubim and the 'ophannim ("wheels," cf.
wide, which is made up of a central pan (e), and a series of concentric compartments (c'), (c 2), (c 3), and which is supported on a frame (d d), revolving round a perpendicular axis on the wheels (n n).
96, pp. 735-74 1, Loewy gives an account of an instrument which he calls an "equatorial coude," designed (I) to attain greater stability and so to measure larger angles than is generally possible with the ordinary equatorial; (2) to enable a single astronomer to point the telescope and make observations in any part of the sky without changing his position; (3) to abolish the usual expensive dome, and to substitute a covered shed on wheels (which can be run back at pleasure), leaving the telescope in the open air, the observer alone being sheltered.
The Power Was Transmitted To The Paddles By Bevel Wheels F, G, Rotating A Spindle Passing Through A Stuffing Box In The Bottom Of The Calorimeter.
If q be any variable co-ordinate defining the position or (in the case of a system of bodies) the configuration, the velocity of each particle at any instant will be proportional to 4, and the total kinetic energy may be expressed in the form 1/8A42, where A is in general a function of q The special case where both cones are right circular and a is constant is important ~n astronomy and also in mechanism (theory of bevel wheels).
Rolling Contact: Smooth Wheels and Racks.In order that two pieces may move in rolling contact, it is necessary that each pair of points in the two pieces which touch each other should at the instant of contact be moving in the same direction with the same velocity.
Turning pieces in rolling contact are called smooth or toothless wheels.
Cylindrical Wheels and Smooth Racks.In designing cylindrical wheels and smooth racks, and determining their comparati* motion, it is sufficient to consider a section of the pair of pieces made by a plane perpendicular to the axis or axes.
The points where axes intersect the plane of section are called centres; the point where the line of contact intersects it, the poini of contact, or pitch-point; and the wheels are described as circular, elliptical, &c., according to the forms of their sections made by that plane.
When the point of contact of two wheels lies between theim centres, they are said to be in outside gearing; when beyond theii centres, ip inside gearing, because the rolling surface of the larger wheel must in this case be turned inward or towards its centre.
of 39 it appears that the angular velocityratio of a pair of wheels is the inverse ratio of the distances of the point of contact from the Centres respectively.
For otitside gearing that ratio is negative, Cs because the wheels turn contrary ways; for inside gearing it is positive, because they turn the same way.
If the velocity ratio is to be -constant, as in, fYi Williss Class A, the wheels must be circular; and this is the most common form for wheels.
If the velocity ratio is to be variable, as in s Williss Class B, the figures of the wheels are a pair of rolling curves, subject to the condition that the distance between their poles (which are the centres of rotation) shall be constant.
of 39 it appears that the angular velocities of a pair of wheels whose axes meet in a point are to each other inversely as the sines of the angles which the axes of the wheels make with the line of contact.
When the velocity ratio is variable, the line of contact will shift its position in the plane C1OC2, and the wheels will be cones, with eccentric or irregular bases.
constant; the line of contact is constant in position, and the rolling surfaces of the wheels are regular circular cones (when they are called bevel wheels); or one of a pair of wheels may have a flat disk for its rolling surface, as W2 in fig.
The rolling surfaces of actual wheels consist of frusta or zones of the complete cones or disks, as shown by W~, Wi in figs.
ing, and are called skew-bevel wheels.
In skew-bevel wheels the properties of a line of connection are not possessed by every line traversing the line of contact, but only by every line traversing the line of contact at right angles.
II the velocity ratio to be communicated were variable, the point D would alter its position, and the line DT its direction, at different periods of the motion, and the wheels would be hyperboloids of an eccentric or irregular cross-section; but forms of this kind are not used in practice.
Sliding Contact (circular): Grooved Wheels.As the adhesion or friction between a pair of smooth wheels is seldom sufficient to prevent their slipping on each other, contrivances are ~ised tc increase their mutual hold.
One of those consists in forming the rim of each wheel into a series of alternate ridges and grooves parallel to the plane of rotation; it is applicable to cylindrical and bevel wheels, but not to skew-bevel wheels.
The comparative motion of a pair of wheels so ridged and grooved is the same a~ that of a pair of smooth wheels in rolling contact, whose cylindrical or conicai surfaces lie midway between the tops of the ridges and bottoms of the grooves, and those ideal smooth surfaces are called the pitch surfaces of the wheels.
Grooved wheels have hitherto been but little used.
Sliding Contact (direct): Teeth of Wheels, their Number anc PitchThe ordinary method of connecting a pair of wheels, or wheel and a rack, and the only method which ensures the exaci maintenance of a given numerical velocity ratio, is by means of i series of alternate ridges and hollows parallel or nearly parallel t(the successive lines of contact of the ideal smooth wheels whon velocity ratio would be the same with that of the toothed wheels The ridges are called teeth; the hollows, spaces.
The pitch-surfaces of a pair of toothed wheels are the ideal smooth surfaces which would have the same comparative motion by rolling contact that the actual wheels have by the sliding contact of their teeth.
The pitch-circles of a pair of circular toothed wheels are sections of their pitch-surfaces, made for spur-wheels (that is, for wheels whose axes are parallel) by a plane at right angles to the axes, and for bevel wheels by a sphere described about the common apex.
For a pair of skew-bevel wheels the pitch-circles are a pair of contiguous rectangular sections of the pitch-surfaces.
The distance, measured along the pitch-circle, from the face of one tooth to the face of the next, is called the pitch., The pitch and the number of teeth in wheels are regulated by the following principles:
In wheels which rotate continuously for one revolution or more, it is obviously necessary that the pitch should be an aliquot part of the circumference.
In wheels which reciprocate without performing a complete revolution this condition is not necessary.
Such wheels are called sectors.
In order that a pair of wheels, or a wheel and a rack, may work correctly together, it is in all cases essential that the pitch should be the same in each.
Hence, in any pair of circular wheels which work together, the numbers of teeth in a complete circumference are directly as the radii and inversely as the angular velocities.
Hence also, in any pair of circular wheels which rotate continuously for one revolution or more, the ratio of the numbers of teeth and its reciprocal the angular velocity ratio must be expressible in whole numbers.
Let n, N be the respective numbers of teeth in a pair of wheels, N being the greater.
It is considered desirable by millwrights, with a view to thi preservation of the uniformity of shape of the teeth of a pair 01 wheels, that each given tooth in one wheel should work with a~ many different teeth in the other wheel as possible.
They there fore study that the numbers of teeth in each pair of wheels whici work together shall either be prime to each other, or shall hav their greatest common divisor as small as is consistent with velocity ratio suited for the purposes of the machine.
Let CiP1, C2P2 be perpendiculars let Pi ~ ~ fall from the centres of the i~) wheels on the line of contact.
The relative velocity pet-pendicular to P~Pi of the teeth at their point of contactthat is, their velocity of sliding on each otheris found by supposing one of the wheels, such as I, to be fixed; the line of centres CXCi to rotate backwards round C~ with the angular velocity aj, and the wheel 2 to rotate round C2 as before, with the angular velocity az relatively to the line of centres CiC2, so as to, have the same motion as if its pitch-circle rolled,on the pitch-circle of the first wheel.
Thus the relative motion of the wheels is unchanged; but I is considered as fixed, and 2 has the total motion, that is, a rotation about the instantaneous axis I, with the angular velocity cii+a1.
Let C1, C1 be the centres of two wheels, B~IB1, B2IB1 their pitch-circles, I the pitch-point; let the obliquity of action of the teeth be constant, so that the same straight line P1 I?z shall represent at once the constant line of connection of teeth and the path of contact.
Draw CiP1, C2P2 perpendicular to P~IP2, and with those lines as radii describe about the centres of the wheels the,circles DiD1, D2D2, called base-circles.
Consequently, one of the forms suitable for the teeth of wheels is the involute of a circle; and the obliquity of the action of such teeth is the angle whose cosine is the ratio of the radius of their base-circle to that of the pitch-circle of the wheel.
Any other convenient figure may be assumed for the path of contact, and the corresponding forms of the teeth found by determining what curves a point T, moving along the assumed path of contact, will trace on two disks rotating round the centres of the wheels with angular velocities bearing that relation to the component velocity of T along TI, which is given by Principle II.
This method of finding the forms of the teeth of wheels forms the subject of an elaborate and most interesting treatise by Edward Sang.
All wheels having teeth of the same pitch, traced from the same path of contact, work correctly together, and are said to belong to the same set.
If the same rolling curve and tracing-point be used to trace both the faces and the flanks of the teeth of a number of wheels of different sizes but of the same pitch, all those wheels will work correctly together, and will form a set.
The teeth of wheels of any figure, as well as of circular wheels, may be traced by rolling curves on their pitch-surfaces; and all teeth of the same pitch, traced by the same rolling curve with the same tracing-point, will work together correctly if their pitchsurfaces are in rolling contact.
The path of contact which it traces is identical with itself; and the flanks of the teeth c are internal and their faces ex ternal epicycloids for wheels, and both flanks and faces are cycloids For a pitch-circle of twice the P, - / radius of the rolling or describing /, -~- circle (as it is called) the internal B ~, epicycloid is a straight line, being, / E in fact, a diameter of the pitch- circle, so that the flanks of the teeth for such a pitch-circle are planes radiating from the axis.
Trundles having only six staves will work with large wheels.
Backs of Teeth and Spaces.Toothed wheels being in general intended to rotate either way, the backs of the teeth are made similar to the fronts.
case of large wheels, of obtain- A2
Perpendicular to 01 draw A1IA2, cutting the axe8 in Ai, A2 make the outer rims of the patterns and of the wheels portions of the cones A1B1I, A,B2I, of which the narrow zones occupied by the teeth will be sufficiently near to a spherical surface described about 0 for practical purposes.
Hookes wheels with oblique or helical teeth are in fact screws of many threads, and of large diameters as compared with their lengths.
Coupling of Parallel Axes.Two or more parallel shafts (such as those of a locomotive engine, with two or more pairs of driving wheels) are made to rotate with constantly equal angular velocities by having equal cranks, which are maintained parallel by a coupling-rod of such a length that the line of c000exion is equal to the distance between the axes.
Let the axis Ai carry a wheel of N1 teeth, driving a wheel of ni teeth on the axis Ai, which carries also a wheel of N2 teeth, driving a wheel of 113 teeth on the axis A3, and so on; the numbers of teeth in drivers being denoted by Ns, and in followers by ns, and the axes to which the wheels are fixed being denoted by numbers.
Supposing all the wheels to be in outside gearing, then, as each elementary combination reverses the direction of rotation, and as the number of elementary combinations m 1 is one less than the number of axes rn it is evident that if m is odd the direction of rotation is preserved, and if even reversed.
It is often a question of importance to determine the number of teeth in a train of wheels best suited for giving a determinate velocity ratio to two axes.
Let B/C be the velocity ratio required, reduced to its least terms, and let B be greater than C. If B/C is not greater than 6, and C lies between the prescribed minimum number of teeth (which may be called t) and its double 2t, then one pair of wheels will answer the purpose, and B and C will themselves be the numbers required.
So far as the resultant velocity ratio is concerned, the order of the drivers N and of the followers n is immaterial: but to secure equable wear of the teeth, as explained in 44, the wheels ought to be so arranged that, for each elementary combination, the greatest common divisor of N and ii shall be either 1, or as small as possible.
Epicyclic Trains.The term ep-icyclic train is used by Willis to denote a train of wheels carried by an arm, and having certain rotations relatively to that arm, which itself rotates.
The arm may either be driven by the wheels or assist in driving them.
The comparative motions of the wheels and of the arm, and the aggregate paths traced by points in the wheels, are determined by the principles of the composition of rotations, and of the description of rolling curves, explained in ~ 30, 31.
A pair of spur wheels in gear is an example of a higher pair, because the wheels have contact between their teeth along lines only.
127, which t o is an epicyclic train of three wheels with the first wheel r, -
The virtual centres 0,-,, O,i are at the respective axes of the wheels r and 1, and the centre O,-i divides the line through these two points externally in the ratio of the train of wheels.
Friction of Teeth.Let N be the normal pressure exerted between a pair of teeth of a pair of wheels; s the total distance through which they slide upon each other; n the number Of pairs of teeth which pass the plane of axis in a unit of time; then nf NI (63)
u=c (ai+ef), where u is that velocity, c the distance TI at any instant from the point of contact of the teeth to the pitch-point, and af, ai the respective angular velocities of the wheels.
In the case of locomotives the balance weights required to balance the pistons are added as revolving weights to the crank shaft system, and in fact are generally combined with the weights required to balance the revolving system so as to form one weight, the counterpoise referred to in the preceding section, which is seen between the spokes of the wheels of a locomotive.
To make the department pay, the machines must be kept fully employed with the many classes of work that a large concern has to deal with; the wheels must be kept running as much as possible, and the time for making-ready curtailed as far as is consistent with the proper preparation of the forme.
Huygens (Descriptio automati planetarii, 1703) uses the simple continued fraction for the purpose of approximation when designing the toothed wheels of his Planetarium.
On wing the movements of the condor, as it wheels in majestic circles, are remarkably graceful.
About a mile west of the town are the curious sea mills; a stream of sea water running down a chasm in the shore is made to turn the wheels.
Some earlier stories, such as The Wheels of Chance (1896) and Love and Mr Lewisham (1900), had proved his talent for drawing character, and pure phantasies like The War of the Worlds (1898) his abundant invention; but Kipps (1905) and Tono-Bungay (1909) showed a great advance in artistic power.
The rainbow-like circular wheels are the propellers, answering to the wheels of a steam-boat, and acting upon the air after the manner of a windmill.
These wheels receive motions from bands and pulleys from a steam or other engine contained in the car.
45), designed in 1874, consisted of a light, powerful, skeleton frame resting on three wheels; a very effective light engine constructed on a new principle, which dispensed with the old-fashioned, cumbrous boiler; two long, narrow, horizontal aeroplanes; and two comparatively very large aerial screws.
It was furnished with four strong flanged wheels and ran along a light broad-gauge (9 ft.) railway track, 1800 ft.
long, in the hope that when the speed reached a certain point it would leave the rails, but it was prevented from rising more than an inch or so by four arms, or outriggers, furnished with wheels, which projected from its sides and ran under an inverted wooden upper or safety track outside the railway track proper.
When the machine had travelled only a few hundred feet, all four of the small outrigger wheels were fully engaged, which showed that the machine was lifting at least 8000 lb.
Steam had already been shut off, and the machine coming to rest fell directly to the ground, all four of its wheels sinking deeply into the turf without leaving other marks.
Before making this run the wheels which were to engage the upper track were painted, and the paint left by them on the upper track indicated the exact point where the machine lifted.
The machine was furnished with two wheels and vertical supports which depended from the anterior parts of the aeroplanes and supported it when it touched the ground FIG.
If now a small weight, as a penny, be passed through the slot, H, it falls into the small box, I, and causes the lever, J, to turn; the lever, J, which turns in friction wheels at K, and is counterbalanced at 0, carries a toothed segment, L, which actuates a small pinion on the same axle as F, and is free to turn on that axle by a sleeve.
Since so small a weight as a penny has to move the lever, J, together with the dial finger, &c., it is evident that the workmanship must be good and the friction kept very low by means of friction wheels.
A useful application of weighbridges is to ascertain the exact weights on the separate wheels of locomotive engines, so that they may be properly adjusted.
The engine is moved on to them, and the pressures of all the wheels are taken simultaneously, each by its own weighbridge.
Behind the pulley at the top of the machine and on the same shaft is a spur wheel, which drives both of the spur wheels shown in the diagram.
When the poise is at the zero end, and there is no load on the platform, the end of the steelyard is down, and has locked the ratchet wheel by means of the pawl; the shaft being thus locked, the sprocket wheels are stopped, the drum-shaft runs free by the friction clutch, and the two pulleys which are connected by the crossed band are running idle.
The mitre wheels come into operation and the poise is carried along till the end of the steelyard drops, and locks the ratchet by permission of the Controller of wheel.
Consequently the motion of the mitre wheels is reversed and the poise is run back to zero.
The poise having arrived at the end of its run and unable to go further, the mitre wheels and the sprocket gearing are stopped, and the two pulleys and the cross belt run idle till the.
A spur pinion D, gearing with both wheels, is carried loosely upon an eccentric E forming part of the central pin, so that when this latter is turned by the hand-wheel F and chain G the axis of the pinion describes a circle the diameter of which equals the throw of the eccentric, and a small relative motion of the two sheaves takes place, depending on the number of the teeth of the annular wheels.
The ratchet communicates with a train of wheels which work the dial-hands.
of Pittsburg, and cars and locomotives are built here; and in the south Altoona foundries car wheels and general castings for locomotives and cars are made.
Other Greek statesmen, and notably Tricoupis, had worked for a Balkan League but failed, partly, no doubt, owing to adverse circumstances, but partly also because of Greek unpreparedness for war and of the inflexibility of the Greek claims. Venizelos was, it is true, favoured by circumstances - the Balkan races just then had been drawn together in self-defence against the newly fledged tyranny of the Young Turks in Macedonia and Thrace, while the military revolt of 1909 had swept the Greek political stage clear of nearly all the corrupt parties, that hitherto had blocked the wheels of the nation's progress.
Wheeled carts were also known; the wheels were often probably only solid disks, though spoked wheels were used for chariots.
At first he devoted himself to mathematical and astronomical studies; his Cosmotheoria (1528) records a determination of a degree of the meridian, which he made by counting the revolutions of his carriage wheels on a journey between Paris and Amiens.
In most cases such wheels merely have earthenware pitchers attached to their circumference by means of wisps of esparto, and are turned by a horse harnessed to a long arm fitted to a revolving shaft.
Eng., 1878, 1879) on the friction between brake-blocks and wheels, and between wheels and rails.
In other fine adjustments by means of springs and balance wheels either a micrometer screw is moved (Zeiss), or a curved disk fixed to the balance wheel is turned (Leitz), or an oblique disk arranged more or less in a circle and attached to the balance wheel is revolved (Reichert).
I knew I needed medical assistance beyond the temporary first aid I applied in my home on wheels.
Her mental wheels began to move again as she grappled with not only what he'd done, but why Andre and Gabriel â€“ who knew the truth long before she did â€“ chose now to have it revealed to her.
The first sign of the ground Dean spotted was a rain puddle reflecting the glow from the lights of the plane as the wheels touched the runwayâ€”one, two, three times before the tired aircraft glided to the taxiway.
After doing some stretching exercises and setting his bike's trip odometer, he began, slowly at first, to swing into his rhythmic cadence of 70 revs per minute, maintaining the pace by shifting gears as the country hills rolled beneath his wheels.
abrasive wheels or diamond tipped blades, usually running dry.
admiration for the excellent work of the meals on wheels service.
We settled for improving last years car by converting to 16 " wheels with covers, improving the aerodynamics & fixing the gears.
However, if you ride a super-lightweight bike, with carbon-fibre wheels, you should seriously consider carrying a small anvil in your pannier.
automatic 4WD transmission regulates traction on the four wheels from 0 to 100% according to grip.
Wheels, rear axle and pedals all run on sealed ball bearings.
ball bearing wheels, making the mower easy to maneuver and variable throttle control.
To grease the wheels for change, the director for retail banking threw his support behind the initiative.
bellows driven by the water wheels.
The car lurches around hairpin bends, its wheels inches from the edge.
Another recently acquired customer is World Wheels, which specializes in selling Dahon folding bicycles.
Even more mysteriously, the train thought to have hit the man has no bloodstains on the wheels.
bogeya configuration of 0-6-0 meant that there were no forward or rear bogies, just three pairs of driven wheels.
The eighth and ninth vehicles derailed rear bogie only and the following vehicles derailed all wheels.
breakaway cable corner steadies jockey wheel Remove the wheels and brake drums.
Using two lamps, two color wheels and dual illumination channeling, the F3 achieves up to 5500 ANSI lumens brightness on screen.
And good-night, Watson, " he added, as the wheels of the royal brougham rolled down the street.
They are made with a camber adjuster so the wheel camber can be accurately adjusted once the trike is on its ' wheels.
The table is attached to a stand complete with lockable casters (wheels ).
castor type wheels.
cast steel wheels shod in solid rubber.
Catherine wheels spinning from the tower itself.
Wheels on fire The passion of national rally champ Richard Mason.
Working with old bicycle wheels and broken china, our mosaic making workshops are great examples of recycling materials.
Aircraft that require hand starting by prop swinging must have chocks placed in front of the wheels.
chocks placed in front of the wheels.
clip a curb and you could get a small kudos award for driving on two wheels momentarily.
Otherwise, indigenous peoples will continue to be mere cogs in the wheels of these billion-dollar industries.
Whether keeping accounting records or running the company payroll, accountants are essential cogs in the wheels of industry.
combustion engines are used in cars to make the wheels go round.
Consider the use of low ground pressure tires, dual wheels or tracked vehicles to minimize soil compaction.
Girls purple bike, 24 " wheels, 18 gears, ex con, suit ages 8 - 12 years. £ 30.
The wheels of screw conveyor were made of PVC.
coupling rods were then fitted back on the wheels.
The floor covering should allow the wheels of the chair to move freely.
Everything you could need for two wheels, with a single-minded dedication to provide the best possible customer service.
The first three wagons of the freight train each had their leading pair of wheels derailed.
They stripped it during the afternoon and found the planet wheels had seized onto the shaft, effectively locking the diff!
disassembles in minutes to fit neatly into an unbelievably small suitcase barely larger than the dimensions of the wheels.
discis manifested itself in the large single 340mm disk with six-piston front caliper, and relatively lightweight 3-spoke wheels.
It must have looked distinctive with the bodywork and wheels painted blue and the interior trimmed with matching leather.
When on two wheels, keep it at 15 mph to stay in a nice donut on two wheels.
To all four wheels actor Douglas henshall in a vacuum.
drape jacket everywhere wheels can bring him from Holland to UK.
The replaced Samsons had smaller 6ft driving wheels and were thus colloquially known as the ' Small Jumbos ' .
The were basically similar to the ' Large Bloomer ' but had smaller boiler and smaller driving wheels 6ft 6in, instead of 7ft.
Rail privatization was once dubbed poll tax on wheels.
A chassis dynamometer is used to measure the power transferred by the drive wheels onto the dynamometer's rollers.
exciting to see the paddle wheels.
The 2004 model features three-spoke wheels and a boldly styled full fairing painted in either Ducati red or Ducati yellow.
It featured quick release wheels, floating front disks and a carbon fiber fairing - all very trick.
The newly developed, extra-light cast aluminum wheels in almost filigree five-spoke design, combine easy care with superior strength and stiffness.
They had 16 " x 24 " cylinders, 6ft diameter driving wheels, domeless boilers and raised firebox.
Plus the standard fitment of stylish 14 " Sao Paulo alloy wheels & the choice of Metallic or Pearl Effect paint.
flanged wheels running on an edge rail.
footy matches, cruising sets the fitness wheels in motion.
The launch of wheels forklift truck Mobilevision signals the impending Industries arrival of several major sports brands to the mobile video medium.
A long handled hammer was all that was needed to detect wheels with hairline fractures.
Power is transmitted through the super direct 6-speed gearbox to the rear wheels.
To better camouflage urban grime, the Lightning CityX features Villain Black cast aluminum wheels and a Midnight Black chin fairing and front fender.
I've got to 40, and now I'll be spending the second half of my life with wheels instead of legs.
hardwood with rubber wheels.
You will also avoid the hassle of securing your wheels, every time you lock your bike up.
helmsmans a very spacious cockpit and her twin wheels provide the helmsmen with an excellent choice of viewing positions.
The car sits up high on 13 inch wheels.
Sealed bearing mechanism and solid disk wheels with chrome hubcaps.
in-line skate wheels make it easy to use and stable on the ground.
jockey wheels kept the frame clear of the lawn which ever way round the mower was used.
Big Ole Bike Bash Had a nasty knock on two wheels?
A target was erected and the Page would mount a wooden ' horse ' on wheels holding a lance.
Two wheels for interchangeable dichroic color and gobo selections, and three available lenses make the luminaire completely user-configurable.
WATER WHEELS In the late 18th and early 19th Century hydraulic machinery was extensively used in mines.
Specific projects have included thermoacoustic refrigeration, automotive wheels and tires, bioengineering applications, robotic manipulators, washing machines and MRI scanners.
Wagon Wheels S A large circular marshmallow and cookie snack covered in chocolate.
Figures 6 and 7 show higher magnification micrographs of hardmetal samples tested with wet rubber, dry rubber and wet steel test wheels.
We recommend that wheels are washed using a microfibre wash mitt and a gentle shampoo in conjunction with the two bucket method.
The world famous National Motor Museum houses fantastic motor vehicles and Wheels Ride experience.
The Saturn Aura's profile is intended to convey a muscular stance with the wheels pushed to the corners creating short overhangs.
Carriage bogie overhauls continued, along with the fitting of new wheels to replace those with casting defects.
The wheels were dropped after takeoff and on the DFS-230 type B we had a braking parachute.
Gold-tone metal necklace with vintage motor car pendant in bright red with gray and orange spoked wheels.
perplexed to learn that the train had no wheels at all.
These include the picnic on Wheels which allows cyclists to stop by the river for a picnic in the surroundings of Seaclose Park.
So I turned around and could only see an old pram with no wheels left by someone to go rusty in the open air.
pram wheels made a marvelous racing car.
Fortunately he had recently come across a couple of old wheels together with fairly presentable tires, at a breaker's yard.
The pulley wheels attach to pulley wheels attach to pulley stiles - the upright sides of the frame which hide the weights.
Activities from Inventor's Workshop link directly to the teaching of wheels and axles, gears, pulleys and cams.
Typical of a vintage model, the legs are steeply raked forward, bringing the wheels a long way forward of the balance point.
rattlee was no sound but the rattling of wheels and the dash of rain upon the roof.
refitted the wheels to the car with some bright new shiney chrome wheel studs.
reflective piping on the hood and seat add safety and it has quick release locks on all the wheels.
A horizontal steering wheel Miniature steering wheels are for people who have little strength or very restricted movement.
Projects Classic Reels on Wheels Each year, the Archive organizes a major film roadshow, Classic Reels on Wheels.
The coupling rods were then fitted back on the wheels.
It has 5 inch wheels with a recommended maximum rider weight of... and has a rounder more ankle friendly edge.
For example, explain to me how they could fake the dust off the wheels of the lunar rover.
sagged down onto the road wheels.
scrabble for grip or tug at the steering wheel; it doesn't spin its front wheels on a brisk getaway.
self-propelled wheelchairs for those who are able to propel themselves using the hand rims attached to the large rear wheels.
sharp-eyed drivers are being urged to help police tighten the screw on thieves who are stealing wheels from high value cars.
Crews use signboards or small gunpowder charges detonated by an oncoming train's front wheels to warn of blockages ahead.
The single bar handle and in-line skate wheels make it easy to use and stable on the ground.
The fastest musical on wheels skates into the New Wimbledon theater.
Riding down the mountain on an oversized skateboard with beefy wheels and trucks.
skateboard wheels are made from polyurethane, this is a hard wearing material which lasts a longtime.
Locking Wheel skewers replace the quick release skewers fitted to many bike wheels to prevent the wheels being stolen.
diesel spills on road surfaces are a menace to anyone on two wheels.
spindly wheels and two-seat accommodation.
But it's fun and keeps the wheels spinning.
spinning color wheels, bars chasing in circular patterns.
But the cotton could not be spun quickly enough in the domestic system by hand-spinners using spinning wheels.
splined hubs for the wire wheels were restored by zinc plating.
The Trophy has a reworked VVC engine producing 158bhp and is distinguishable by 16 alloy wheels, front bib splitter and boot spoiler.
The wheel magnet attaches to conventional three crossed spoke pattern wheels, bladed or radial spokes may require an alternate spoke magnet.
Both wheels were rebuilt with stainless spokes by Brian Parsons of Fleet, Hampshire.
Large sliding cabin doors; retractable undercarriage, with the main wheels housed in small sponsons.
Colonel Stevens, an American, built a small steamboat with a propeller or " screw " for propulsion instead of paddle wheels.
Optional equipment includes attractive polished wood center console plus, for the first time, classically stylish 18 ' ' wire wheels.
suitcase with wheels or a light luggage trolley.
The ELX gains climate control, alloy wheels, twin electric sunroofs and folding door mirrors.
Optional extras include Hellfire missiles, chain gun, tilt and slide sunroof, alloys wheels and power assisted steering.
factory sunroofs were also a popular addition, along with alloy wheels and metallic paint.
BMW, in particular, produces wheels that are notoriously susceptible to curb kissing.
swivel wheels are lockable with a new braking system for a safer ride.
At that very moment the wheels of the plane hit the tarmac with a bang causing the suitcase lid to slam shut once more.
Today there are three water wheels driving large tilt hammers and grindstones.
Its solid, hooked tines cut through the toughest thatch and the wheels keep it at a constant level.
toddler walker in bright and cheerful colors, made from European hardwood with rubber wheels.
Values through car churchill insurance wheels zero tolerance ' ago mainly relying.
traction control made the wheels stick to the dirty winter road.
The fully automatic 4WD transmission regulates traction on the four wheels from 0 to 100% according to grip.
If wheels don't do it for you then why not try aerial trapeze.
Color coordinated door mirrors, contrasting chrome door handles and roof rack with rather trendy wheels add the finishing touches.
Three wheels, for example, makes a tricycle or trike.
It hauled tubs of ore to the crushing mill while other wheels worked the crushing machines, jiggers, buddles and separators.
tyres steel disk wheels, white walled cross ply tires and blue hood and tonneau lend it extra period charm.
undercarriage unit has twin wheels and is fitted with powerful brakes, retracting aft when the aircraft is airborne.
Examine areas where water splash from both the trailer and the towing vehicle wheels would strike the underside of the trailer.
Other modifications to wheels, tires and suspension can also make an already firm ride downright unpleasant.
For this reason, we recommend switching to a microfibre wash mitt when wash mitt when washing wheels and the insides of wheel arches.
At first these were called mills, as they were built beside streams and had water wheels to drive the machinery.
water wheel pits housed 30 ' x 4 ' and 40 ' x 4 ' wheels respectively.
Brakes are disk and work on the rear wheels.
It jumped the curb just opposite the Bath Abbey, spinning wheels across stone.
The spoked aluminum wheels are a classic enduro feature.
It features front lockable swivel wheels, comfortable foam padded handle and two detachable hoods.
The front wheels can either swivel or be fixed.
Coupling Rod These couple driving wheels of the same size together to spread the tractive effort over the coupled wheelbase.
The third pair of driving wheels had no flanges, to assist the long rigid wheelbase get round sharp curves.
Features include realistic styling, racy stickers, large, durable wheels and a wide wheelbase that is designed for stability.
whirling wheels of the generators.
Camber on the front wheels can be set using the adjustable link on the upper wishbone.
wonky wheels almost falling off country tinged 'Party ' .
The pinion z and the toothed wheel d are connected by an intermediate wheel and pinion Y; the numbers of teeth in the wheels and pinions are so proportioned that twenty-four revolutions of the micrometer screw produce one revolution of the drum and wheel d.
The cries of animals are but the working of the curiously-contrived machine, in which, when one portion is touched in a certain way, the wheels and springs concealed in the interior perform their work, and, it may be, a note supposed to express joy or pain is evolved; but there is no consciousness or feeling.
Out of the north (the Babylonian sacred mountain) comes a bright cloud, wherein appear four Creatures (formed on the model of Babylonian composite figures), each with four faces (man, lion, bull, eagle) and attended by a wheel; the wheels are full of eyes, and move straight forward, impelled by the spirit dwelling in the Creatures (the spirit of Yahweh).
With the exception of a few special cranes in which friction wheels are employed, it is universally the practice, in steam cranes, to connect the engine shaft with the barrel shaft by spur toothed gearing, the gear being connected or disconnected by sliding pinions.
The latter consists of a framework carrying the hoisting barrel, with its driving motor and gearing, and a travelling motor, which is geared to the running wheels in such a manner as to be able to propel the whole machine; FIG.