There are three Li ting - typical methods: (I) A direct pull may be applied to the hook, either by screws, or by a cylinder fitted with is piston and rod and actuated by direct hydraulic or other pressure, as shown diagrammatically in fig.
The later English artists have somewhat changed the mode of communicating motion to the slides, by attaching the screws pdrmanently to the micrometer head and tapping each micrometer screw into its slide.
One reply to this is that it is not difficult to determine from time to time the errors of the screws and to apply the necessary corrections to the observations.
"I want to stop him before he screws up a real missing person case by sending the police off on a snipe hunt," he snarled.
Not if it screws up what we're doing... what we should be doing right now, instead of talking about my love life.
There are all kinds of different tools, pitons, hammers to set pitons, ice screws, pound-ins, ice hooks, wired nuts and cams—different stuff for different surfaces.
The eyepiece slides into the tube cd, which screws into the brass ring ef, through two openings in which the oblong frame, containing the micrometer slides, passes.
I, 2 and 3), used to bolt the head of one of the screws, and the instrument was provided with a slipping piece, giving motion to the micrometer by screws acting on two slides, one in right ascension, the other in declination, so that " either of the, webs can be placed upon either component of a double star with ease and certainty (Mem.
The five fixed webs are attached to the table which is secured to the bottom of the box by the screws p. The three movable webs are attached to the projections XX on the frame aa.
The microscope or viewing telescope is fitted with a spider-line micrometer having two screws at right angles to each other, by means of which readings can be made first on one reseau-line, then on the star, and finally on the opposite reseau-line in both co-ordinates.
Two other screws, o, p, the heads of which are not graduated, give motions to the whole micrometer box through t 1 mm.
But a little consideration will show that when the plate is reversed 180° the effects of errors of the screws produced by wear are practically eliminated.
the absolute freedom of the derived co-ordinates from the effects of wear of the screws in the mean of measures made in reversed positions of the plate.
fur Instrumenten- the focussing screws 0 1 and 02.
The manufacture of woollens, linens, hosiery, furniture, gloves, paper, machinery and tools, carriages, nuts and screws, needles and other hardware goods is carried on.
Where the rail-gauge is narrow and great weight is not desired, blocking girders are provided across the under side of the truck; these are arranged so that, by means of wedges or screws, they can be made to increase the base.
A coarse screw-thread is formed in the upper part of the inner cup, and this screws on to the end of the iron bolt by which it is supported.
The coils of the electromagnets are differentially wound with silk-covered wire, 4 mils (= 004 inch) in diameter, to a total resistance of 400 ohms. This differential winding enables the instrument to be used for " duplex " working, but the connexions of the wires to the terminal screws are such that the relay can be used for ordinary single working.
By means of several adjusting screws the force and frequency of these blows can be exactly regulated.
6) for cleaning or renewal; the adjustment of the bearings is made by screwing up the cage cap b, locked by a special washer and the two screws a, a (figs.
Among the city's manufactures are oxide of tin and other chemicals, iron and steel, leather goods, automobiles and bicycles, electrical and telephone supplies, butted tubing, gas engines, screws and bolts, silk, lace and hosiery.
Ball, Theory of Screws (Dublin, 1876); and papers in Phil.
Two other prominent categories are also worth exploring and they are the Special Application category and Nose Pad Screws section.
In the Nose Pad Screws category, you'll be able to purchase screws that are specifically designed to help mount your nose pads.
Screws: These can be found at the hinges where the temples connect to the frame front, but they may also be found on the bridge, holding the nose pads in place.
AC Lens has a repair kit with a screwdriver and two common hinge screws.
There are easy fixes that can be done at home, like loose screws or nose pad replacements.
Screws and springs: Various pieces of the frame are held together by screws and springs.
Screws can fall out due to becoming stripped.
Some screws simply need to be tightened and this can be done with the simple twist of a screwdriver.
While it's smart to keep a kit to replace glasses screws and nose pads, other parts of your glasses can break, crack, or become damaged.
The tiny ones will easily take the place of screws lost on standard eyeglass styles.
Check out Eyewear Repair Express eBay for singular eyeglass parts purchases, including nose pads and screws.
For example, if you need to replace screws in the arm bar or replace nose pads, you can do this by simply purchasing an eye glass repair kit at almost any local department store.
However, this warranty is only offered on manufacturing and material defects, and does not cover damage caused by improper handling, such as scratches or loss of screws.
Usually, they can provide same-day replacement of screws or minor parts and can do more complex repairs and parts replacements within several days.
Many optical stores carry standard replacement parts, such as screws and nose pads, in the form of a repair kit.
Replace missing screws with those from the repair kit; tighten with a mini screw-driver.
Check screws occasionally and tighten as necessary.
Strip: There are no screws, rivets or soldering in the Strip eyeglasses from Lindberg.
Another idea to consider is getting your frames inspected every several months to make sure that screws and hinges are tight and your lenses are secure in the frame.
Many times you can purchase wine glass racks that come with no instructions and just a set of screws.
A cell phone case goes on top of this and is either held in place by tiny screws or with a snap-together design.
He constructed gratings up to 340 periods to the inch by straining fine wire over screws.
In Rowland's dividing engine the screws were prepared by a special process devised by him, and the resulting gratings, plane and concave, have supplied the means for much of the best modern optical work.
focus, would correspond with 2" of arc. But, after all, this is no practical difficulty, for screws can be used to separate the lenses, and, by these screws, as in a Gascoigne micrometer, the separation of the lenses can be measured; or we can have scales for this purpose, read by microscopes, like the Troughton 1 circles of Piazzi or Pond, or those of the Carey circle, with almost any required accuracy.
The slides are moved by the screws a and b, the divided heads of which serve to measure the separation of the segments.
These screws are turned from the eye-end by bevelled wheels and pinions, the latter connected with the handles a', b'.
The reading micrometers e, f also serve to measure, independently, the separation of the segments, by scales attached to the slides; such measurements can be employed as a check on those made by the screws.
The third method is the most symmetrical of all, both in observation and reduction; but it was not employed by Bessel, on the ground that it involved the determination of the errors of two screws instead of one.
4) that Bessel had indicated, by notes in his handbooks, the following points which should be kept in mind in the construction of future heliometers: (I) The segments should move in cylindrical slides; b (2) the screw should be protected from dust; 6 (3) the zero of the position circle should not be so liable to change; 7 (4) the distance of the optical centres of the segments should not change in different position angles or otherwise; 8 (5) the points of the micrometer screws should rest on ivory plates; 9 (6) there should be an apparatus for changing the screen.'° Wilhelm Struve, in describing the Pulkowa heliometer,' 1 made The distances of the optical centres of the segments from the eye-piece are in this method as I; secant of the angle under measurement.
4 I criticizing Bessel's choice of methods, and considering the loss of time involved in each, it must be remembered that Fraunhofer provided no means of reading the screws or even the heads from the eye-end.
He considered that the changes were due to wear, which would be much lessened if the screws were protected from dust.
9 We have been unable to ascertain the reasons which led Bessel to choose ivory planes for the end-bearings of his screws.
But the method is not available if the separation is to be measured by screws; it is found, in that case, that the direction of the final motion of turning of the screw must always be such as to produce motion of the segment against gravity, otherwise the " loss of time " is apt to be variable.
Thus the simple connexion of the two screws by cogwheels to give them automatic opposite motion is not an available method unless the separation of the segments is independently measured by scales.
means of measuring the focal point were provided; symmetrical motion was given to the slides; scales on each slide were provided instead of screws for measuring the separation of the segments, and both scales were read by the same micrometer microscope; a metallic thermometer was added to determine the temperature of the scales.
Side-shake is prevented by the screws and pieces k, k, k, k.
Accordingly, in reading the scales A and B (attached to the slides which carry the two halves of the object-glass), it is only necessary to turn the screws until the fixed 1 The primary object was to have the object-glass mounted in steel cells, which more nearly correspond in expansion with glass.
The water-tight lining may be either a wrought iron tube, which is pressed down by jack screws as the borehole advances, or cast iron tubbing put together in short complete rings, in contradistinction to the old plan of building them up of segments.
The hand-wheel that screws the gun and cradle down at the same time screws the sight up, and vice versa.
The probable errors and eccentricities of small micrometer-screws have been carefully investigated to ± 0.00001 inch; but the accuracy of leading screws used in workshops has not been sufficiently verified.
For some engineering purposes it would appear to be desirable to produce master-screws to an accuracy of (1/2000)th of an inch to the foot of screw, so as to serve indirectly for the verification of "guiding screws" for general use in workshops.
The fallers are travelled forwards by means of screws, and when at the end of the screw are dropped automatically into the thread of a receiving screw fixed below, which carries the fallers back to their starting point to be risen by cams into the top pair of screws thus to repeat their journey.
These rise 'Two screws, of different pitch, are provided, to give different speeds.
To the legs is screwed a plate 00, which supports the lower side of the plate PP. This receives the ends of the screws SS by which the instrument is levelled, its annular portion being larger than the collar in 00, so that, until clamped by the screwed plate above it, the whole of the instrument except the legs can be moved horizontally in any direction to the extent of about in.
The bearings for receiving these trunnions are V-shaped; the V on one side is fixed, while the other is cut through and can be narrowed or made wider, thus lifting or lowering the trunnion by means of two capstan-headed screws.
The upper plate is bored through the centre and carries a conical pillar, which rotates freely in it and supports a horizontal plate, to the extreme ends of which are attached, by means of capstan screws or otherwise, two vertical supports, on which the telescope, which is constructed to be perpendicular to the vertical axis of the instrument, rests and rotates with it.
In Japan, Germany, Austria, England and Russia horizontal pendulums of the von Rebeur-Paschwitz type are employed, which by means of levelling screws are usually adjusted to have a natural period or double swing of from 15 to 30 seconds.
The adjustment of the instrument is effected by means of screws in the bed-plate, by turning which the axis o'o" may be brought into a position nearly vertical.
In miscellaneous metal trades, embracing tinplate goods, wire workers, makers of stoves, grates, ranges and fire-arms, makers of bolts, nuts, rivets, screws and staples, and those occupied in several subsidiary trades, the number of operatives in 1901 amounted to 13,209.
The base plate rests upon levelling screws which permit the adjustment of the polar axis to be made with great precision.
This cone is mounted on a circular base b which rests on three levelling screws, two of which are visible in the figure.
Ball's paper on the Theory of Screws, published in 1872.
The principal manufactures are agricultural implements, furniture, pianos and screws.
Balls Theory of Screws an analysis is made of the possible displacements of a b~dy which has respectively two, three, four, five degrees of freedom.
We assume that the body receives arbitrary twists about twc given screws, and it is required to determine the character of the resultant displacement.
We examine first the case where the axes of the two screws are at right angles and intarsect.
where h, k, are the pitches of the two given screws.
Balls Theory of Screws.
(15) The distribution of pitch among -the various screws has therefore a simple relation to the pitch-conic hx2+ky=const; (16)
It remains to show that a system of screws of the above type can be constructed so as to contain any two given screws whatever.
In the first place, a cyhindroid can be constructed so as to have its axis coincident with the common perpendicular to the axes of the two given screws and to satisfy thi-ee other conditions, for the position of the centre, the parameter, and the orientation about the axis are still at our disposal.
Hence we can adjust these so that the surface shall contain the axes of the two given screws as generators, and that the difference of the corresponding pitches shall have the proper value.
It follows that when a body has two degrees Of freedom it can twist about any one of a singly infinite system of screws whose axes lie on a certain cylindroid.
Again, that wrenches of arbitrary amounts about two given screws compound into a wrench the locus of whose axis is a cylindroid.
p p are the pitches of the two screws.
The factor (P+P) cos 0h sin 0 is called the vIrtual coefficient of the two screws which define the types of the wrench and twist, respectively.
The theory of the screw-systems which are reciprocal to one, two, three, four given screws respectively has been investigated by Sir R.
Balls highly original investigations in kinematics and dynamics were published in collected form under the title Theory of Screws (Cambridge, 1900).
Those pieces are connected at theii joints or surfaces of mutual contact, either by simple pressure and friction (as in masonry with moist mortar or without mortar), by pressure and adhesion (as in masonry with cement or with hardened mortar, and timber with glue), or by the resistance of fastenings of different kinds, whether made by means of the form of the joint (as dovetails, notches, mortices and tenons) or by separate fastening pieces (as trenails, pins, spikes, nails, holdfasts, screws, bolts, rivets, hoops, straps and sockets.
Helical motion and screws adapted to it are said to be right- or left-handed according to the G appearance presented by the rotation to an observer looking towards the direction of the translation.
Convex and concave screws are distinguished technically by the respective names of male and female; a short concave screw is called a nut; and when a screw is spoken of without qualification a convex screw is usually understood.
A pair of convex screws, each rotating about its axis, are used as an elementary combination to transmit motion by the sliding contact of their threads.
Such screws are commonly called endless screws.
At the point of contact of the screws their threads must be parallel; and their line of connection is the common nerpendicular to the acting surfaces of the threads at their point 0f contact.
Hence the following principles: I If the screws are both right-handed or both left-handed, the angle between the directions of their axes is the sum of their obliquities;if one is right-handed and the other left-handed, that angle is the difference of their obliquities.
The angular velocities of the screws are inversely as their numbers of threads.
Hookes wheels with oblique or helical teeth are in fact screws of many threads, and of large diameters as compared with their lengths.
The ordinary position of a pair of endless screws is with their axes at right angles to each other.
When one is of considerably greater diameter than the other, the larger is commonly called in practice a wheel, the name screw being applied to the smaller only; but they are nevertheless both screws in fact.
To make the teeth of a pair of endless screws fit correctly and work smoothly, a hardened steel screw is made of the figure of the smaller screw, with its thread or threads notched so as to form a cutting tool; the larger screw, or wheel, is cast approximately of the required figure; the larger screw and the steel screw are fitted up in their proper relative position, and made to rotate in contact with each other by turning the steel screw, which cuts the threads of the larger screw to their true figure.
74~ Differential Screw.On the same axis let there be two screws of the respective pitches Ps and p1, made in one piece, and rotating with the angular velocity a.
We take it that the machine has already been regulated by means of the impression screws at the respective ends of the cylinder for all-round or average work, and that any inequality of impression can be remedied by adding or taking away from the sheets on the cylinder.
This physiologist in 1867 2 showed that all natural wings, whether of the insect, bird or bat, are screws structurally, and that they act as screws when the y are made to vibrate, from the fact that they twist in opposite directions during the down and up strokes.
These surfaces may be conferred on artificial wings, aeroplanes, aerial screws or similar structures; and these structures, if we may judge from what we find in nature, should be of moderate size and elastic. The power of the flying organs will be increased if they are driven at a comparatively high speed, and particularly if they are made to reverse and reciprocate, as in this case they will practically create the currents upon which they are destined to rise and advance.
During the down stroke of the piston the wing is flattened out in every direction, and its extremities twisted in such a manner as to form two screws, as seen at a' b' c' d', e' f' g' h', B, B'.
35) The peculiarity of Pettigrew's wings and screws consists in their elasticity, their twisting action, and their great comparative length and narrowness.
After Pettigrew enunciated his views (1867) as to the screw configuration and elastic properties of natural wings, and more especially after his introduction of spiral, elastic artificial wings, and elastic screws, a great revolution took place in the construction of flying models.
Brown,' elastic aerial screws by J.
Armour, 2 and elastic aeroplanes, wings and screws by Alphonse Penaud.3 Penaud's experiments are alike interesting and instructive.
He constructed models to fly by three different methods: - (a) by means of screws acting vertically upwards; (b) by aeroplanes propelled horizontally by screws; and (c) by wings which FIG.
This author, in his treatise on the Theorie de la vis d'Archimede, describes a machine provided with two screws which he calls a " pterophores."
Cayley's screws were peculiar, inasmuch as they were superimposed and rotated in opposite directions.
He estimated that if the area of the screws was increased to 200 sq.
Bright took out a patent for a machine to be sustained by vertical screws.
m, n, o, p; q, r, s, t, Screws arranged on vertical axes to act vertically upwards.
This model, which was shown at the exhibition of the Aeronautical Society of Great Britain at the Crystal Palace in 1868, consisted of two superposed screws propelled by an engine, the steam for which was generated (for lightness) in an aluminium boiler.
All the models referred to (Cayley's excepted') were provided with rigid screws.
In 1872 Penaud discarded the rigid screws in favour of elastic ones, as Pettigrew had done some years before.
sists of two superposed elastic screws (a a, b b), the upper of which (a a) is fixed in a vertical frame (c), which is pivoted in the central part (d) of the under screw.
Several inventors succeeded in making models fly by the aid of aeroplanes and screws, as, e.g.
Models on the aeroplane screw type may be propelled by two screws, one fore and one aft, rotating in opposite directions; and in the event of only one screw being employed it may be placed in front of or behind the aeroplane.
from 1 Cayley's screws, as explained, were made of feathers, and consequently elastic. As, however, no allusion is made in his writings to the superior advantages possessed by elastic over rigid screws, it is to be presumed that feathers were employed simply for convenience and lightness.
Pettigrew, there is reason to believe, was the first to advocate the employment of elastic screws for aerial purposes.
A vertical movement having been communicated by means of india-rubber in a state of torsion to the roots of the wings, the wings themselves, in virtue of their elasticity, and because of the resistance experienced from the air, twisted and untwisted and formed reciprocating screws, precisely analogous to those originally described and figured by Pettigrew in 1867.
Henson was one of the first to combine aerial screws with extensive supporting structures occupying a nearly horizontal position.
It was hoped that when the aeroplanes were wedged forward in the air by vertical screws, or by the body to be flown, each aeroplane would rest or float upon a stratum of undisturbed air, and that practically the aeroplanes would give the same support as if spread out horizontally.
in 1868, in which Wenham's aeroplanes were combined with aerial screws.
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.
a, Large aeroplane; b, Small aeroplane; c, Propelling screws.
48) consisted of a platform, on which stood a large water-tube boiler, a number of concavo-convex aeroplanes arranged in tiers like shelves, each making a slight upward angle with the horizon, two very large vertical screws placed aft and propelled by steam engines, tanks for the storage of water, naphtha, &c. The boiler was especially noteworthy.
Nearly half of the power of the engines was lost in the screw slip. This showed that the diameter of the screws was not great enough; it should have been at least 22 ft.
The end knife-edges are adjusted and tightly jammed into exact position by means of wedge pieces and set screws, and the beam is furnished with delicate adjusting weights at its top. The position of the beam with respect to the horizontal is shown by a horizontal pointer (not shown) projecting from one end of it, which plays past a scale, each division of which corresponds to the i l oth or i hth of a grain according to the size and delicacy of the machine.
When the case which holds the machine is adjusted hori - zontally by means of its foot - screws, and the weights in the pans are equal, the beams remain perfectly horizontal; but with the slightest difference of weight in the pans the beams are tilted, and the elastic resistance of the springs to torsion allows the beams to take up a definite position of equi - librium.
The zero adjust - ment is effected by means of levelling screws in the base of the frame.
He was an admirable lecturer and writer of popular books on his subject, as well as of more learned works such as his Treatise on Spherical Astronomy (1885) and Treatise on the Theory of Screws (1900); and he was a congenial figure in all circles.
4, shows a clutch for a rope-driven pulley A, which runs freely on a bush B on the shaft, and is provided with an enlarged cylindrical nave or clutch box C. A split ring D, carried by the clutch and turning with it, can be thrust against the clutch box by rightand left-handed screws E, so that a sufficient grip is obtained to cause the clutch and the pulley to turn as one piece.
It has an Evangelical church, a modern château of the princes of Stolberg, with pretty grounds, and a high grade school, and manufactures metal wares, machines and iron screws and bolts.
cb, Comb bar; g, g, glass sheets; s, s, screws; e, entrance.
By means of screws the stage plate is movable in two directions at right angles to one another, in the plane of the stand.
That kind of thinking screws up successful prosecution and doesn't help getting search warrants.
There are all kinds of different tools, pitons, hammers to set pitons, ice screws, pound-ins, ice hooks, wired nuts and camsâ€”different stuff for different surfaces.
Plus, I wouldn't trust Arthur as far as I could toss him and if he screws around with this he could get someone killed.
They didn't even take time to put the screws back in.
Wooden beading should be glued and fixed with security screws.
Similarly, when a human controller screws up and causes a train collision, we consider this an unfortunate accident.
Allen screws are just there to steady the pole once the security bolt is pushed through.
Allen key for these screws is included with each pack of gears.
This noble alloy is found in the magnesium generator cover with titanium screws and dedicated sprocket cover of billet aluminum.
This method of passing the line lessens the danger of the heavy backwash carrying the towline into the screws of either or both boats.
The posterior column is then stabilized by lag screws placed along the pelvic brim.
broken-winded screws fade away whenever we board the white wonders of HVC and hit the skies.
The back of the clocks is fixed with brass screws and hand bound in dark green library buckram.
butt cap is a new round stainless steel design that will integrate into a stainless V rest which screws into a rod pod.
Remove two small Phillips screws and gently move the CD caddie forward.
caddy held in place with 2 screws.
The special screws required to hold the drive in place are located to the left of the drive caddy.
cancellous screws through a stab incision on the medial side.
BUMAX 88 to ISO 4762 hexagon socket cap screws M6 to M24 with lengths greater than 3 diameters.
chipboard flooring must not have any gearing nor risen nails or screws.
chipboard screws to the floor to secure it to the joists.
We always prefer to use screws to fix the cladding to the frame even if we are using plasterboard.
clamping bolts loosened, restart the engine and adjust the throttle idling screws on each carburetor to give the desired idling speed.
concealed fixings, so when mounted no screws are visible.
Any plug or socket with badly corroded screws should be replaced.
Do you have a co-worker who ALWAYS screws up stuff, creating MORE work for you?
Attachment is with self tapping screws to avoid thermal distortions of the type induced in the present surface by spot welding.
The colored locking and sealing adhesives are best suited for bonding metallic fasteners such as screws, nuts and studs.
We can help you if you need plastic fasteners or screws for plastic.
The mirror frame is hung between two scratch stock, tapered supports with adjustable, brass thumb side screws and brass bell finials.
fixing screws are properly concealed.
fryhis way we cant be blamed if the pizza place screws your order or you dont get fries with ya burger!
The end screws off the shell and inside you find a little silver locket.
For instance, the timbers are jointed together using traditional mortise and tenon joints, dowel pegs, copper nails and brass screws.
No mounting plate is needed, just two mounting screws.
A good omen next time Beckham screws up or gets injured!
pedicle screws in.
When fastening the plasterboard, the screws must be connected to the channels in-between the studs or joists.
plasterboard screws to hold the ceiling rose!
Made from durable molded polypropylene, the device consists of two stainless steel plates secured by galvanized topping screws.
protrudeake sure there are no protruding nails or screws.
Tools for riveting, nailing or screwing or removing rivets, nails, screws or similar uses.
Useful for tightening those awkward little screws in glasses.
Clear Password Take off bottom housing of AcerNote 970 by unscrewing 7 screwing 7 screws.
undo the two screws which secure the bottom of the Atom.
The ankle was put back on with some good surgery and seven stainless steel screws.
The Allen screws are just there to steady the pole once the security bolt is pushed through.
Other features include Stainless steel rust-free screws, plus an anchor kit for fixing down the building to your base or paved area.
To change the bulb, simply remove two tiny grub screws with a hexagonal key.
Fit the board to the top section of the case, and replace the four self-tapping screws.
I would have preferred it if the screws were thumb screws or at least slightly bigger screws as these ones are tiny.
The copper or brass stand-off screws come with the case.
To do this you just unscrew two little screws either side with the mini screwdriver provided and unclip a spring.
Seat them down on a bead of clear low modulus silicone sealer before the screws are inserted.
Supplied in pairs complete with hardened steel socket cap style mounting screws and stainless steel bearing shims.
Unbolt the fan shroud from the radiator (top two screws ).
silicone sealer before the screws are inserted.
Make sure you set the screws into the fence's vertical support posts, rather than the thin horizontal slats.
Brass screws (which are visible) are used to secure the seat base slats of this model.
Dispensing with the need for locking screws, Sonos sounders and sounder beacons use Time Saver bases from sister company Apollo Fire Detectors.
The floor can then be replaced using screws to ensure it is secure and does not squeak.
stabilized by lag screws placed along the pelvic brim.
stainless steel screws.
Remove the screws which secure the stator to the bracket and the complete motor and head assembly will lift off the bracket.
Be careful not to damage the chrome strip or lose any of the screws or their special chrome cup washers.
talus fracture was fixed with 2 cancellous screws from the lateral side.
tamper resistant screws, which neatly hold the plaque from the rear.
tapping screws to avoid thermal distortions of the type induced in the present surface by spot welding.
tappet block hold-down screws.
The cams and spur wheel should be securely attached to the shaft, the grub screws being gently tightened as necessary.
trochlear notch with screws.
undo socket head screws.
unscrew the 3 screws & put the PCB back in place.
The usual range of accessories was offered with a particularly well-made fixed steady with the fingers adjusted by screws.
When fitting in wooden greenhouses use wood screws (not supplied) in place of the cropped headed bolts & nuts.
I used over 80 screws, doing each by hand would have taken a very long time and given me a very sore wrist!
p. io) claim that became universal; the methods of illumination were improved; and micrometers with screws of previously unheard of fineness and accuracy were produced.
2, and consist of brass forks k and 1, into which the ends of the screws o and p are rigidly fitted.
In the middle of this slide a stiffly fitting brass disk is inserted, to which a small turn-table motion may be communicated by an attached arm, acted on by two fine opposing screws accessible to the astronomer; and by their means the " fixed web " may be rendered strictly parallel with the movable one.
This screw fits neatly in the end of the box at passes loosely through the web-frame at e', is tapped into the frame at ?', and its end rests on a flat hardened surface at Rotation of the web-frame about /3y is prevented by the heads of the screws at m; the head of the screw on the lower side of the frame reposes on the plane vv, that on the upper side (fig.
The two micrometer screws (X and Y, fig.
in directions parallel to the axes of the two micrometer screws.
Each of the two micrometer screws X and Y moves a system of six parallel webs, placed 4" of arc apart from each other.
The two micrometer screws shall be without sensible periodic or other error, and exactly alike in pitch.
By means of one of the micrometer screws X place the star's image in the middle of the six parallel webs which are moved by X.
The accuracy of this apparatus has been frequently criticized on the ground that errors are produced in the screws by the effect of wear.
But a little consideration will show that when the plate is reversed 180Ã‚° the effects of errors of the screws produced by wear are practically eliminated.
To fulfil condition (I) the plates A i and A, are mounted in circular slides, whose centres are El and E2 respectively, so that by means of the screws Dl, D2, with their corresponding opposing springs F 1 and F 2, the operation can be very easily accomplished.
4) that Bessel had indicated, by notes in his handbooks, the following points which should be kept in mind in the construction of future heliometers: (I) The segments should move in cylindrical slides; b (2) the screw should be protected from dust; 6 (3) the zero of the position circle should not be so liable to change; 7 (4) the distance of the optical centres of the segments should not change in different position angles or otherwise; 8 (5) the points of the micrometer screws should rest on ivory plates; 9 (6) there should be an apparatus for changing the screen.'Ã‚° Wilhelm Struve, in describing the Pulkowa heliometer,' 1 made The distances of the optical centres of the segments from the eye-piece are in this method as I; secant of the angle under measurement.
The principal industries are the manufacture of small arms (by the Colt's Patent Fire-Arms Manufacturing Co., makers of the Colt revolver and the Gatling gun), typewriters (Royal and Underwood), automobiles, bicycles, cyclometers, carriages and wagons, belting, cigars, harness, machinists' tools and instruments of precision, coil-piping, church organs, horse-shoe nails, electric equipment, machine screws, drop forgings, hydrants and valves, and engines and boilers.
The probable errors and eccentricities of small micrometer-screws have been carefully investigated to Ã‚± 0.00001 inch; but the accuracy of leading screws used in workshops has not been sufficiently verified.
Two screws are reciprocal when a wrench about one does no work on a body which twists about the other.
On the contrary, it favours the belief that it should be a compact and moderately heavy and powerful structure, which trusts for elevation and propulsion entirely to its flying appliances - whether actively moving wings, or screws, or aeroplanes wedged forward by screws.
In 1863 the subject of aviation by vertical screws received a fresh impulse from the experiments of Gustave de Ponton d'Amecourt, G.
Cayley gave a practical illustration of the efficacy of the screw as applied to the air by constructing a small machine, consisting of two screws made of quill feathers, a representation of which we annex (fig.
It has an Evangelical church, a modern chÃ¢teau of the princes of Stolberg, with pretty grounds, and a high grade school, and manufactures metal wares, machines and iron screws and bolts.
"Smack at 'em, lads!" he kept saying, seizing the guns by the wheels and working the screws himself.
The most common solution these days is to use rigging screws.
Clear Password Take off bottom housing of AcerNote 970 by unscrewing 7 screws.
Undo the two screws which secure the bottom of the Atom.
Unbolt the fan shroud from the radiator (top two screws).
Make sure you set the screws into the fence 's vertical support posts, rather than the thin horizontal slats.
Fasten the short length of wood to the Long piece using either screws or nails and your stopcock key is ready to use.
The image films were printed for record, and the talus fracture was fixed with 2 cancellous screws from the lateral side.
It is retained by two M10 stainless steel tamper resistant screws, which neatly hold the plaque from the rear.
Pre 1977 1/2 model year bikes used a unique thread size for the tappet block hold-down screws.
No hefty pump arms, slim, sleek and stripped with just two thumb screws.
The challenge is to obtain stable fixation of the ulna without violating the trochlear notch with screws.
The only thing that will undo socket head screws.
Unscrew the 3 screws & put the PCB back in place.
I used over 80 screws, doing each by hand would have taken a very long time and given me a very sore wrist !
He decided to galvanize the screws so that they would not rust.
Safety issues: We suggest that all bookcases are secured to walls with brackets or screws to ensure safety when you have a toddler (you may forget later!
Check for loose or rough nails, screws, and other hardware.
Most cribs require a second tightening of the screws about two to three weeks after assembly, once the wood of the crib has become acclimated to the temperature in your home.
Check your crib regularly to ensure all parts are in working order and that all screws are tight, and order any replacement parts as soon as you see the need arise to keep your baby's crib a safe place to sleep.
The tray should be smooth on top and underneath, with no exposed screws, bolts or nuts.
A good frame that is meant to last will be held together by screws, brackets dowels and some glue.
You can also use wood screws to attach these.
If you anticipate having to move your cat furniture, you may want to construct the pieces with screws and bolts for easy tear down.
Set up a table or bench in the basement or garage with simple hand tools like hammers, drills and screwdrivers, along with some wood, nails and screws.
They are usually attached with simple screws and washers.
Punch through the material with the screws and secure.
Fold the ends under and then drive the screws into the frame (be sure to use a washer on each screw).
Sometimes loose parts on the chair can be fixed by tightening bolts or screws.
Many chairs are held together by Allen-head bolts or screws, so investing in a good set of Allen wrenches is smart.
Check all bolts or screws and tighten if necessary.
Build a simple square or rectangular frame from the 2 x 4s by pre-drilling holes in the ends of them and attaching them together using wood screws.
Evenly space the support braces inside the bed frame and attach them to the frame with wood screws.
Predrill holes into the top platform and use wood screws to attach the platform to the frame.
Using quality 2x8s and 2x4s together with plenty of 2-1/2 inch deck screws is recommended.
Secure the back of the seat bottom to the chair back with four 1-inch wood screws.
Secure the sides with four 1-inch wood screws on each side.
Use four 1-inch wood screws on both sides to secure the top.
Attach the arms to the footrest ends by screwing the 3/8 inch screws through the nylon washers into the footrest.
Attach the opposite ends of the arms to the sides of the chair at a 45-degree angle by drilling ¼ inch holes into the chair sides and adding 3/8 inch screws on each side.
Old pieces of recycled wood can also have nails and screws embedded in it, therefore be careful when handling and cutting old wood.
Using the screws and a drill or screwdriver, attach the hinges at the top and bottom of each panel, in turn attaching each panel to the one next to it.
If not, buy specialty drywall screws that will expand and grip the wall from the inside, providing extra support.
No screws or holes are needed to hold the rod in place.
The rod will be placed into the wall plates, with the swivel connectors attached and secured with the retaining screws.
Adjust the rod if needed and then insert the set screws and tighten with the Allen wrench.
But here's the problem, if a teen screws up her eyebrows she will unknowingly hide it with lots of make-up.
The lid of the container screws on fairly tight, so I don't have to worry that it's going to become contaminated by the other products in my makeup bag and I'm hopeful that the lid will keep germs out as well!
This long cord screws into the camera and allows you to press the shutter button remotely.
Most contemporary ski bindings can be adjusted by turning large screws on the bindings on the outside of the bindings - one on the toe piece and one on the heel piece.
Experts suggest that you use a drill bit that is somewhat smaller than the screws.
Then, insert the screws and screw the toe piece into place.
A professional will simply adjust the bolts or screws on the skis appropriately.
These screws are on the outside of the bindings themselves.
By turning the screws in a specific fashion, the bindings increase or decrease the tension holding them in place.
Friction: Using different screws and plugs, students can experiment with how lubrication helps friction.
Assemble the box by first attaching the lumber to the bottom of the plywood base with the two and one-half-inch long wood screws.
Attach to the plywood by drilling two screws on each end of the lumber so it is firmly secured.
Flip the the plywood over and attach each of the sides using the one inch screws.
For sides over six inches, place screws at three-inch intervals to insure the sides will remain sturdy.
Additionally, you will need some general hardware such as nails or screws, a hammer or screwdriver, a level, tape measure and a saw.
Other materials needed include two by fours, deck screws, and hinges.
Attach a shorter piece of wood to a longer piece using deck screws in the corner to form a 90 degree angle.
Repeat for the top layer and tighten the screws to ensure the frame is sturdy.
You will also need to drill holes for the screws that will keep these parts in place.
If you are using a deck plan, it will tell you how much lumber, how many posts and approximately how many boxes of deck screws you will need.
Install your decking - Attach you decking using deck screws.
Remove the switch covers and tape the screws to the back of them.
Attach the cabinet - Use 3 - 3 1/2 inch long wood screws to ensure a tight hold to the wall stud behind the cabinet.
Make sure the screws are in place securely before you try lowering the door.
Where retail consumers can buy plumbing fixtures, like toilets, in complete kits that include screws, gaskets and wax rings, commercial plumbing products are more often sold separately.
When affixing drywall to the framing members, be sure to protect your door from scratching by using construction adhesive instead of nails or screws.
Use drywall screws instead of nails, they're less likely to pop out or cause problems later.
Start drilling screws in the center of the panel and work out rather than starting on either end.
They also have holes designed for long-threaded screws to make a strong, firm attachment.
When you replace drywall, don't use screws that could scratch the door.
Whenever possible, use galvanized nails and screws to control rust.
Armstrong ceiling tracks can be attached with nails or screws and installed with up to fifty percent fewer nails than standard furring strips.
Plank ceilings are installed directly to furring strips or exposed joists with clips and screws.
If the hole lines up with a stud in the wall, secure the piece of sheetrock to the stud with sheetrock screws.
Use sheetrock screws to secure the wood to the back side of the wall.
Place the sheetrock patch in the hole and secure it with screws, either to the stud or to the pieces of wood you added.
Using your drill with the screwdriver bit, drive the first sheetrock screw at the center of the sheet, and then continue driving the screws every six inches toward the edge of the sheet.
Again, attach the sheet to the wall with sheetrock screws starting from the center of the sheet and work outward.
Sheetrock Screws: These special screws are used to affix the sheetrock to the studs.
Holding the panel into place, use screws to hold the sheetrock into place.
Make sure the sheetrock screws go into the studs, with about 8 inches between each screw.
You want the screws to create a slight dimple without breaking the paper on the sheetrock.
A new section of drywall, usually a scrap, is cut to fit the area and affixed to the supporting plywood with drywall screws.
Use them to safely hold your tools, nails, screws and projects, locking them up tight so nothing gets lost.
You measure, cut with a saw and attach using deck screws.
Drive screws at an angle at each corner of the extender into the sill.
Secure the window frame to the wall studs and header using screws and check once again to make sure the window is plumb.
With the trim removed, locate the fastener screws or nails along the top and bottom sills that hold the window in place.
Remove the fastener screws from the framing or if the window is nailed in place; you can pry them out with a hammer or cut through the nails using a saber saw.
Remove a couple of screws, pull the panel out and flip it; now your white dishwasher has a black front panel.
Once you're certain that power is off, go ahead and remove the face plate by removing the two screws.
Pull hard if you need to; it will come out enough so that you can access the side terminal screws.
Double-check each of the side terminal screws with your proximity switch to be sure none of them have any voltage.
You'll typically see the black, or "hot" wire, connected to a darkly colored screw and the neutral wires (green and white) connected to lightly colored screws.
Unscrew each of the side terminal screws so that you have room to slide the curled end of each wire underneath each screw.
Connect each wire in the same way you disconnected the old outlet, with the black wire around the darker screws and the neutral and common wires around the lighter screws.
Tighten each of the screws and cover them all with electrical tape.
Push the outlet back into the box and attach with the screws.
Replace the faceplate and replace the screws as well.
Connect the two black wires to the brass screws on your new switch, push the switch back into the box and attach with the two screws.
Reattach the cover plate and affix with the screws.
It is found at Bike Gifts and is a unique design crafted from black rubber, stainless steel links, and steel screws.
Hold the board against the post and attach using at least two wood screws, vertically placed.
You might even want to take them to an optical repair shop for loose screws, since it's so easy for the screwdriver to slip and scratch a lens.
Then keep little screws and screwdrivers on hand, and you'll be all set.
Included in this kit are two screwdrivers with extension handles, four screws in varying sizes, two nose pads, two rubber o-rings, a glasses strap and a magnifying glass.
It contains one metal screwdriver and the two most commonly used hinge screws for frames.
It is common for screws to come loose and often fall out of the frames.
No screws or complicated procedure needed!
"Plates, Screws, and Children: Their Relationship in Craniomaxillofacial Trauma."
Metallic implants include artificial joints, pacemakers, aneurysm clips, metal plates, pins or screws, and surgical staples.
Devices include plates, nails, screws, and rods.
To maintain the proper spinal posture before fusion occurs, metal rods are inserted alongside the spine and are attached to the vertebrae by hooks, screws, or wires.
Many items, such as screws and light bulbs, require a left-to-right turning that is easier for a right-hander.
Screws should be tightly in place before you begin dancing, as this will prevent a tap from flying off halfway through a lesson!
Place the vacuum cleaner upside down and remove the screws will a screwdriver.
Put the screws in a safe place to avoid losing them.
Remove all of the screws from the bottom plate with a Philips screwdriver.
Once the screws are out, you should be able to pull the plate off.
Household Helpers: Pick up wrenches, hammers, nails, screws and other small tools you know each man needs or wants.
Make sure all of the nuts, bolts, and screws are appropriately tightened.
Check screws, nails, and hinges of toys, sports equipment, and swingsets periodically.
Examine the toy for potential safety hazards-Look for sharp edges, screws, loose parts, etc. before you purchase and before your child rides the toy.
Pay close attention to irregularities, such as loose hinges, unreasonable dents, warping, and missing parts like screws.
These rings are made so that they are not fully continuous, and are secured at the base with a bead that either snaps or screws in.
Pyrex and glass nose screws are not bendable so they can be tricky to insert without practice, and you will need to determine which direction of curve your nose piercing will need.
Bio-Flex can be clear or white, and nose screws with or without small jewel studs are available.
Metal nose screws can be subtle or be teamed with a flesh toned bead or jewel to create a more subtle piercing.
Caliber 13RO: This hand-wound movement features an eight day power reserve, Titanium regulation screws, and three mainspring barrels.
Put a few bolts, screws, ball bearings, or other metal objects in each can, and tape the top shut.
Create a rectangle box measuring two by three feet using wood screws.
Add a bottom to the planter by attaching the box to one of the remaining pieces of three-foot wood using wood screws.
Missing screws, loose joints and instability are all signs that the equipment is in poor condition and will fall apart soon.
Fine art is thought of being on canvas and paint as well as using other mediums like buttons, screws, bolt, shards of glass and milk cartons.
Motion is communicated to the forks by female screws tapped in the heads m and n acting on the screws o and p respectively.
Thus the smallest rotation of either head communicates to the corresponding slide motion, which, if the screws are accurate, is proportional to the amount through which the head is turned.
The word usage examples above have been gathered from various sources to reflect current and historial usage. They do not represent the opinions of YourDictionary.com.