Cranes Sentence Examples
Sometimes, especially in the case of overhead travelling cranes for very heavy loads, the chain is a special pitch chain, formed of flat links pinned together, and the barrel is reduced to a wheel provided with teeth, or " sprockets," which engage in the links.
Ducks, cranes and other aquatic birds abound in the delta.
For dock-side jib cranes the use of electric power is making rapid strides.
The use of cranes is of great antiquity, but it is only since the great industrial development of the 19th century, and the introduction of other motive powers than hand labour, that the crane has acquired the important and indispensable position it now occupies.
Hand cranes are extremely useful where the load is not excessive, and the quantities to be dealt with are not motive powers.Advertisement
Where, however, there are a number of cranes all belonging to the same installation, and these are placed so as to be conveniently worked from a central power station, and where the work is rapid, heavy and continuous, as is the case at large ports, docks and railway or other warehouses, experience has shown that it is best to produce the power in a generating station and distribute it to the cranes.
Down to the closing decades of the 19th century hydraulic power was practically the only system available for working cranes from a power station.
Electricity as a motive power for cranes is of more recent introduction.
For overhead travellers in workshops, and for most of the cranes which fall into our second class, electricity as a motive power has already displaced nearly every other method.
Cranes fitted with rotating hydraulic engines may be considered as coming under the third category.Advertisement
Barrel cranes are usually fitted with band brakes, consisting of a brake rim with a friction band placed round it, the band being tightened as required.
An excellent brake for very large cranes is Matthew's hydraulic brake, in which water is passed from end to end of cylinders fitted with reciprocating pistons, cooling jackets being provided.
In electric cranes a useful method is to arrange the connexions so that the lifting motor acts as a dynamo, and, driven by the energy of the falling load, generates a current which is converted into heat by being passed through resistances.
In the second, or " braking off " method, the brake is automatically applied by a spring or weight, and is released either mechanically or, in the case of electric cranes, by the pull of a solenoid or magnet which is energized by the current passing through the motor.
In all places where finished goods are handled, or manufactured goods are made, cranes of various forms are in universal use.Advertisement
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 different kinds of motive power used to actuate cranes - manual, steam, hydraulic, electric - give a further classification.
It is at once evident that hand power is only suitable for cranes of moderate power, or in cases where heavy loads have to be lifted only very occasionally.
The first method is in general use for steam cranes; it allows for a far greater range of power in the brake, but is not automatic, as is the second.
This method of working is very suitable for electric dock-side cranes of capacities up to about 5 or 7 tons, and for overhead travellers where the height of lift is moderate.Advertisement
In steam cranes it is usual to work all the motions from one double cylinder engine.
In electric cranes the motor is connected to the barrel, either in a similar manner by spur gear or by worm gear.
Much attention has been paid to the improvement of the mechanical details of the lifting and other motions of cranes, and in important installations the gearing is now usually made of cast steel.
In revolving cranes ease of slewing can be greatly increased by the use of a live ring of conical rollers.
Electric motors for barrel cranes are not essentially different from those used for other purposes, but in proportioning the sizes the intermittent output has to be taken into consideration.Advertisement
In steam cranes much the same principle obtains in proportioning the boiler; e.g.
The motor in most common use for electric cranes is the series wound, continuous current motor, which has many advantages.
Tests of the comparative efficiencies of hydraulic and electric cranes tend to show that, although they do not vary to any very considerable extent with full load, yet the efficiency of the hydraulic crane falls away very much more rapidly than that of the electric crane when working on smaller loads.
The limit of speed of lift of hand cranes has already been mentioned; for steam jib cranes average practice is represented by the.
Where electric or hydraulic cranes are worked from a central station the speed is greater, and may be roughly represented by V =5 +30o/T; e.g.
In addition to the brakes on the lifting gear of cranes it is found necessary, especially in quickrunning electric cranes, to provide a brake on the subsidiary motions, and also devices to stop the motor at the end of the lift or travel, so as to prevent over-running.
Derrick cranes are made of all powers, from the timber I-ton hand derrick to the steel 150-ton derrick used in shipbuilding yards.
When portable cranes are fitted with springs and axle-boxes, drawgear and buffers, so that they can be coupled to an ordinary railway train, they are called " breakdown " or " wrecking " cranes.
Dock-side jib cranes for working general cargo are almost always made portable, in order to enable them to be placed in correct position in regard to the hatchways of the vessels which they serve.
It is often very desirable to have the quay space as little obstructed by the cranes as possible, so as not to interfere with railway traffic; this has led to the introduction of cranes mounted on high trucks or gantries, sometimes also called " portal " cranes.
Cranes of this type are called " half-portal " cranes.
There are numerous and important variations of these two types, but the above contain the elements out of which most cranes of the class are built.
Gruidae, cranes, cosmopolitan, allied Phororhacos, Tertiary of Argentina.
This second method forms the basis of the lifting gear in all hydraulic cranes.
While working at cranes or capstans 3 411 4.
The water cranes or towers which are placed at intervals along the railway to supply the engines with water require similar care in regard to the quality of the water laid on to them, as also to the water troughs, or track tanks as they are called in America, by which engines are able to pick up water without stopping.
In either case the platform is fitted with a crane or cranes for lifting merchandise into and out of the wagons, and doors enable the shed to be used as a lock-up warehouse.
Geese and cranes, chicory, mildew, thistles, cleavers, caltrops, darnel and shade are farmer's enemies.
The fifth order (the third of the Dasypaedes) is formed by the Grallatores, divided into 2 " series " - (I) Altinares, consisting of 2 " cohorts," Herodii with I family, the herons, and Pelargi with 4 families, spoonbills, ibises, storks, and the umbre (Scopus), with Balaeniceps; (2) Humilinares, also consisting of 2 " cohorts," Limicolae with 2 families, sandpipers and snipes, stilts and avocets, and Cursores with 8 families, including plovers, bustards, cranes, rails, and all the other " waders."
Still we live meanly, like ants; though the fable tells us that we were long ago changed into men; like pygmies we fight with cranes; it is error upon error, and clout upon clout, and our best virtue has for its occasion a superfluous and evitable wretchedness.
A long war, not with cranes, but with weeds, those Trojans who had sun and rain and dews on their side.
The electric transmission of energy can be performed with an efficiency not reached by any other method, and the electric motor readily adapts itself to cranes.
Cranes driven by shafting, or by mechanical power, have been largely superseded by electric cranes, principally on account of the much greater economy of transmission.
It consists of a heavy base, which is securely bolted to the foundation, and which carries the cranes.
With portable cranes means must be provided to ensure the requisite stability against overturning; this is done by weighting the tail of the revolving part with heavy weights, and in steam cranes the FIG.
In connexion with the stability of portable cranes, it may be mentioned that accidents more often arise from FIG.
The principal component parts of a traveller are the main cross girders forming the revolving bridge, the two end carriages on which the bridge rests, the cranes.
Cranes, partridges and varieties of singing birds abound.
The avifauna is varied and abundant, comprising eagles, vultures (protected by law), hawks, owls, pelicans, cranes, turkeys, geese, partridges " (called quail or " Bob White " elsewhere), ducks, &c., besides numerous smaller species, many of which are brilliant of plumage but harsh of voice.
There is ample equipment of fixed and movable staiths and cranes of various sizes up to 70 tons, the Lewis-Hunter patent cranes being largely used for shipping coal owing to their minimizing the breakage of coal and securing its even distribution.
The docks are provided with gas and electric lights, 18 steam cranes for loading and discharging vessels, a triple line of railway and a supply of fresh water.
Among the larger birds are cranes, herons, the ibis, storks, eagles, vultures, falcons, hawks, kites, owls, the secretary birds, pelicans, flamingoes, wild duck and geese, gulls, and of game birds, the paauw, koraan, pheasant, partridge, guinea fowl and quail.
In some refineries the travelling cranes are now run by electricity, which still further facilitates the work.
In the first example, which was erected on the quay at Newcastle in 1846, the necessary pressure was obtained from the ordinary water mains of the town; but the merits and advantages of the device soon became widely appreciated, and a demand arose for the erection of cranes in positions where the pressure afforded by the mains was insufficient.
A wharf equipped with cranes extends beyond the surf line and the town is served by a light railway.
The birds include eagles - some are called lammervangers from their occasional attacks on young lambs - vultures, hawks, kites, owls, crows, ravens, the secretary bird, cranes, a small white heron, quails, partridges, korhaans, wild geese, duck, and guineafowl, swallows, finches, starlings, the mossie or Cape sparrow, and the widow bird, noted for the length of its tail in summer.
In the southern part of the city is a United States navy yard and station, officially the Norfolk Yard (the second largest in the country), of about 450 acres, with three immense dry docks, machine shops, warehouses, travelling and water cranes, a training station, torpedoboat headquarters, a powder plant (20 acres), a naval magazine, a naval hospital and the distribution headquarters of the United State Marine Corps.
They are constructed of granite, and no expense has been spared in equipping them with hydraulic cranes, warehouses, &c.
Geese, ducks, cranes, pelicans and gulls are very numerous in the autumn months.
The whole internal harbour system is furnished with powerful hydraulic cranes and lines of railway running alongside the quays.
Storks, cranes, herons and spoonbills are common.
Geese and ducks of different sorts were bred in countless numbers by the farmers, also pigeons and quails, and in the early ages cranes.
There are also herons, ibises, storks and cranes, including the great blackheaded white crane, Mycteria americana, which ranges from northern Argentina to Colombia.
The work of construction was under the control of the Inland Waterways and Docks Section of the Royal Engineers, and involved the reclamation of a large tract of swampy foreshore, the widening and deepening of the waterway, the construction of a wharf and jetty nearly a mile in length equipped with powerful cranes and of docks for the building and repair of certain kinds of craft, the erection of acres of hutments and store-sheds, and the laying of some 50 m.
In 1917, speed of transport of material becoming extremely urgent, it was decided to establish a train-ferry service; it came into operation at the end of that year, and the hoisting of cargoes by cranes into barges was largely superseded.
There are deer (at least five species), boars, bears, antelopes, beavers, otters, badgers, tiger-cats, marten, an inferior sable, striped squirrels, &c. Among birds there are black eagles, peregrines (largely used in hawking), and, specially protected by law, turkey bustards, three varieties of pheasants, swans, geese, common and spectacled teal, mallards, mandarin ducks white and pink ibis, cranes, storks, egrets, herons, curlews, pigeons, doves, nightjars, common and blue magpies, rooks, crows, orioles, halcyon and blue kingfishers, jays, nut-hatches, redstarts, snipe, grey shrikes, hawks, kites, &c. But, pending further observations, it is not possible to say which of the smaller birds actually breed in Korea and which only make it a halting-place in their annual migrations.
The most important are eagles, kites, vultures, falcons, owls, horn-bills, cranes, pheasants (notably the argus, fire-back and peacock-pheasants), partridges, ravens, crows, parrots, pigeons, woodpeckers, doves, snipe, quail and swallows.
One-sixth to be deducted off wire rigging, wire ropes and wire hawsers, chain cables and chains, donkey engines, steam winches and connexions, steam cranes and connexions; other repairs in full.
Among the manufactures of Alliance are structural iron, steel castings, pressed sheet steel, gun carriages, boilers, travelling cranes, pipe organs, street-car indicators, sashes and doors, and account registers and other material for file and cabinet-bookkeeping.
From time to time upon the Rio Grande may be seen ducks, wild geese, swans, cranes, herons and gulls.
The matte also, in all economically planned works, is conveyed, still molten, by electric cranes from the furnace to the converters.
The massive iron bridges across the dock entrances are opened and closed by hydraulic power, which is likewise applied to the cranes, coal-hoists, warehouse-lifts and other machinery about.
It has two basins, with the necessary accompaniment of cranes, storehouses, &c., and the deepening of the Oder from Stettin to the Haff to 24 ft.
These jetties are provided with hydraulic cranes, &c., and railways connect them with the main line, so that goods can be sent direct from the jetties to every part of South Africa.
It possesses a floating dock capable of lifting a vessel of 850o tons, a floating workshop, a patent slip for small craft, hydraulic cranes, &c. The minimum depth alongside the quays at low water is 23 ft., increased at places to over 30 ft.
Cranes, storks, flamingoes and pelicans are found in large variety.
Innumerable aquatic birds haunt the banks of the Save, Danube and Drina, and the lower reaches of the Timok and Morava; among them being pelicans, cranes, grey and white herons, and many other kinds of waders, besides wild geese, ducks, rail and snipe.
We hire site accomodation, materials handling equipment, generators, tower cranes, self erecting cranes, crawler cranes and marine equipment.
No. 4 Key, King's Dock, offering 400 m of quayside and three 10-tonne capacity grabbing cranes.
There is a harbor connected to the plant, this had three large electric rail-mounted cranes, presumably to bring ore in.
This PBS page on the series, called The Life of Birds, has a few paragraphs toward the bottom about the whooping cranes.
He created dynamic images ranging from steep perspectives of the gantry cranes, then down into the scarlet freight containers in the hold.
The company now has 25 trading subsidiaries, producing a range of engineering products from cement cooling machines to dockside cranes.
A comprehensive range of tower cranes and crawler cranes are available nationwide from the crane department.
The warehouse provides 23 tote stacker cranes for the efficient supply of 23 pick workstations that are located on two levels.
When the chains were in place vertical suspension rods were added before the two huge girders were added by two mammoth cranes.
Employers must also make certain operators of lorry loader cranes are properly trained in all aspects of the operation of a lorry loader cranes are properly trained in all aspects of the operation of a lorry loader.
A London electrician became a lottery multimillionaire by using serial numbers on cranes at a foundry where he has worked for almost 50 years.
The lid itself simply lifts off and is decorated with a round inlaid cork picture, which features pagodas, cranes and pines.
I spent some time trying to use the cranes and docks, which are graphically portrayed in the game, but to no avail.
In total, there are 27 cranes on the city center skyline.
Overhead Cranes These are only found in fairly specialized warehousing operations such as metal stockholders.
Some 200 different species of birds live in the park and include toucans, cranes, peacocks, hummingbirds, macaws and flamingos.
Duck, teal, cranes and other aquatic birds abound in the delta.
Machines used for lifting only are not called cranes, but winches, lifts or hoists, while the term elevator or conveyor is commonly given to appliances which continuously, not in separate loads, move materials like grain or coal in a vertical, horizontal or diagonal direction (see Conveyors).
All the methods in this third category require a rotating lifting or barrel shaft, and this is the important difference between them and the hydraulic cranes mentioned above.
In free-barrel cranes the lifting barrel is connected to the revolving shaft by a powerful friction clutch; this, when interlocked with the brake and controller, renders electric cranes exceedingly rapid in working, as the barrel can be detached and lowering performed at a very high speed, without waiting for the lifting motor to come to rest in order to be reversed.
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.
In well-designed, quick-running cranes the mechanical efficiency of the lifting gear may be taken as about 85%; a good electric jib crane will give an efficiency of 72%, i.e.
There are many other important points of crane construction too numerous to mention here, but it may be said generally that the advent of electricity has tended to increase speeds, and in consequence great attention is paid to all details that reduce friction and wear, such as roller and ball bearings and improved methods of lubrication; and, as in all other quick-running machinery, great stress has to be laid on accuracy of workmanship. The machinery, thus being of a higher class, requires more protection, and cranes that work in the open are now fitted with elaborate crane-houses or cabins, furnished with weather-tight doors and windows, and more care is taken to provide proper platforms, hand-rails and ladders of access, and also guards for the revolving parts of gearing.
Portable cranes are of many kinds.
Includes mobile cranes, works trucks, road rollers and showmen 's vehicles.
Bring the outdoors inside with birds, cranes and pond themes.
Cranes, bamboo, ducks, flower blossoms, and birds often make up some of the designs on the uchikake.
Look for Arts and Crafts style tiles with images of pine trees, or handmade ceramic tiles that fit together to form a water view, complete with cranes.
The following art objects in this collection include two beautiful artist signed cranes.
The two most prominent ones are a pair of Mandarin ducks or a pair of cranes.
Cranes symbolize eternal love, a couple that is inseparable and fidelity.
Whether you are new to paper folding and can barely make an airplane or you have an entire room covered in origami doves and cranes, you can find helpful hints and tips at LoveToKnow Origami.
You can also find instructions for birds of all types, from cranes to eagles.
From delicate roses to lifelike origami cranes, folded paper creations have a beauty that's all their own.
From traditional cranes to fortune-tellers to samurai helmets, origami is an ancient art that continues to innovate while preserving its past.
The book, Folding of 1000 Cranes, provided instructions and pictures of paper folding techniques and creations.
While many people associate origami with folding paper cranes or flowers, origami weapons are actually a very popular choice for people who enjoy making origami things.
In 1797, the book, How to Fold 1000 Cranes was published.
Dollar Bill Origami has designs for cranes, vultures (perhaps not the best choice for a serious gift), geese, swans, peacocks, pelicans, and eagles.
Long considered one of the classic folded paper shapes, origami cranes are simple to make.
A chain of 1,000 cranes can also symbolize world peace.
One popular ancient Japanese legend says that anyone who folds 1,000 origami cranes will receive a wish.
You may be familiar with one special story involving origami cranes.
From her sickbed, she began the process of folding 1,000 cranes with the goal that she would wish for world peace.
According to the story, she died before she could finish; however, her friends continued her project, and the cranes were buried with her.
If you're planning to make strings of cranes, you'll also need a needle and sturdy twine to create the crane garlands.
There's a reason origami cranes are one of the most popular folded paper shapes.
While origami can be used to make everything from tiny paper cranes to boxes for party favors, tea bag folding almost always involves creating a symmetrical medallion.
At the Swim Outlet, iPlay's Blue Cranes Swim Trunk is available for $17.00.
The pattern of these shorts are incredibly cute as cranes, hippos and even turtles all appear to be dancing and smiling across the surface.
One rational explanationproposed for the sightings argued that sandhill cranes were spotted in the region between 1966 and 1967, which was an unusual occurrence.
Sandhill cranes have a cry similar to the shriek reportedin the Mothman sightings.
Set in the fictional town of Harmony in New England, the Passions soap opera followed the lives and loves of the Russells, the Bennetts, the Cranes and the Fitzgeralds.
People who are skilled at origami can create beautiful designs, from cranes to dragons to boxes and just about anything else they can imagine.
Machines used for lifting only are not called cranes, but winches, lifts or hoists, while the term elevator or conveyor is commonly given to appliances which continuously, not in separate loads, move materials like grain or coal in a vertical, horizontal or diagonal direction.
Cranes may be divided into two main classes - revolving and non-revolving.
Steam is an extremely useful motive power for all cranes that are not worked off a central power station.
Hammer-headed cranes are generally constructed in large sizes, up to 200 tons.