US263479A - oapen - Google Patents

Description

(No Model.) 4 sheets-sheet 1. T. W. CPEN.

TRAVBLING CRANE.

No. 263,479. Patented Aug. 29, 1882.

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(No Model.) 4 Sheets-*Sheet 2. T. W. CAPEN.

TRAVELING CRANE.

No. 263,479. Patented Aug. 29, 1882.

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(No Model.) 4 Sheets-Sheet 3. T.' W. CAPEN.

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(No Model.) 4 Sheets-Sheet 4 T. W. CAPEN.

TRAVBLING GRANB.

No. 263,479. Patented Aug. 29, 1882.

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THOMAS lV. CAPEN, OF STAMFORD, CONNECTICUT, ASSIGNOR vTO THE YALE LOCK MANUFACTURINGPCOMPANY, OF SAME PLACE.

TRAVELING CRANE.

SPECIFICATION forming part of Letters Patent N0. 263,479, dated August 29, 1882,

.application fried July 2o, 1882. (No modem To all whom it may concern:

Be it known that I, THOMAS W. CAPEN, o Stamford, in the county ot'Fairtield and State ot' Connecticut, have invented certain new and useful Improvements in Traveling Cranes, of which the following is a specification.

The object of my invention is to improve the construction and organi'zltion of parts of the crab of a traveling' crane of the kind set forth in the United States Patent of Thomas A. Veston, No. 198,718, granted December 25, 1877, and to provide an automatic brake to prevent the running down ofthe load, which may be applicable also in connection with other hoisting machines, especially where a worm and worm-wheel areemployed.

In the accompanying drawings, Figure l is a top view of the crab, partly broken away. Fig. 2 is a side view of the same. Fig. 3 is an end view. Fig. et is a central vertical section on the line 4 d of Figs. l and 2. Fig. 5 is a central view on the line 5 5 of Figs. l and 4. Fig. 6 is a side view otI one of the shafts andV worms detached, showing the casing in section. Fig. 7 is a central longitudinal section of the same'. Fig. 8 is an end elevation ofthe crab resting upon its bridge, showing a portion ot' one opt' the tracks which support the bridge and the pending pull-chains and hoisting-chains; and Fig. 9 is a side elevation of the crab and pending chains, showing a portion ot' the bridge.

A indicates a traversinghand-wheel, and A its pull chain or rope. B indicates another traversing hand-wheel, and B its pull chain or rope. Fixed cables and their sheaves are partially shown in Figs. S and 9. Pulling upon one side of these pull-chains will cause the crab to travel in one direction upon the bridge, and pulling on the other side of these chains will cause the crab to travel in the opposite' direction on the bridge. By pulling diagonally opposite sides of these chains the bridge is caused to travel in one direction on its tracks, and by pulling the opposite diagonal sides of the chains the bridge is caused to travel in the opposite direction on its tracks. By pulling on one side of one of these opposite chains,whilc the other chain remains at rest, the crab and bridge will both move, giving a diagonal lnotion to the load in one direction, and by pulling on the other side of the chain the crab and bridge will both move, causing an opposite diagonal movement of the load. these traversing hand-wheels and pending pull-chains and the two intersecting iiXed cables and their sheaves, described in the said patent of Thomas A. Weston, the crab and bridge are moved separately in either direction, the crab on its bridge and the bridge on its tracks; or both crab and bridge may be moved simultaneously in either direction, giving a diagonal resultant motion to the load, whereby the load may he placed by the operator at will in any desired position within the area bounded bythe two tracks which support the bridge. I claim nothing, however, with respect to these movements and this result, but simply refer to them and to the said patent of Thomas A. \Veston, where they are fully described, by way ot' making my improvements clearly understood by reference to operating parts in connection with which they are employed and with which they are organized.

C indicates a large hand-wheel operated by means of the pull chain or rope C, and D a small hand-wheel operated by means of the pullchain or rope D. Each ot' these handwheels is secured to a shaft, E, on the inner end of which is a worm, E', beyond which is the inner housing of the shaft. Each worm engages with a worin-wheel, F, which is rigidly connnected with a chain-wheel, F. The endless hoisting-chain Gr passes down on one side of one of the pocketed chain-wheels and up 0n the other side of the other, forming two loops, one for the slack and the other for the block H, which hangs in a diagonal position.

From the foregoing it will be seen that by rotating either of the hand-wheels the corresponding chain-wheel will raise or lower one part ot' the hoisting-chain and lift or lower the Thus by means ot' load, the chain being pockcted in its wheels,

so that it cannot slip. The different diameters of these hand-wheels, when used alone, give two different speeds for hoisting and lowering, the small Wheel and its pull-chain being' used for light weights and quick speeds and the IOO 6 5 any slipping that takes place will take place l large wheel andits pull-chain for heavy weights and slow speeds. Pulling upon one side of either of these chains lowers the load and pulling upon the other side raises it. Pulling upon corresponding sides of both chains at the same time will give the sum of the speeds of both, either for raising or lowering the load. Pulling upon opposite sides of both at the same time will give a differential resultant speed, either for raising or lowering the load. Thus four different speeds of either raising or lowering the load are obtainable.

Referring to the automatic brake, it will be seen that each worm-shaft E is dividedinto two parts atI for the purpose of applying the brake. To the exterior part, or that to which the handwheel is secured, isl rigidly attached a driver, K. This driver, as shown enlarged in Figs. 6 and 7, consists of a hollow cylinder, with a halfcylindrica-l section cut away from the point L to its inner end; but its form may be moditied. 'Io the extension or inner part of the shaft is rigidlyattached a collar, M, which has a projeetinglug,N. Next to this collaris a loose collar, O, provided with a projecting lug, P. The extreme inner end ofthe shaft is provided with a bearing, Q, and is prevented from longitudi nal motion outward by the fixed collar R or otherwise. 'lhe adjacent faces of the fixed collar M and the loose collar 0 are inclined, as illustrated. Only a single incline is shown; but the incline might be double-that is to say, there might be two inclinesin opposite directions.

'lhe operation of this brake mechanism is as follows: Then the outer part ot' the shaft is revolved the driver K turns around until it picks up the collars M and by means of the lugs N and P, which are in such position that the inclined adjacent faces of the collars tit together, so as to make collars M and 0 practically one piece when the lugs are in operation. rIhe result is that both parts of the shaft turn freely, the worm is revolved, and the worm-wheel is rotated. Motion in the contrary direction will produce a similar effect, the lugs engaging on opposite sides. Now, the load can only run down by turning the inner part of the shaft through the force of the load applied to the chain-wheel and communicated to the worm-wheel and worm. As soon as motion from such a canse takes place the fixed collar M will begin to turn; but there will be nothing to turn the loose collar 0. The result will be that the inclines will begin to climb up one on the other, which will make a pinch between the collars M and It, because the climbing ofthe inclines will cause the collar M to push inward on the collar 0 and force it against the end of the shaftfbearing at w. The farther the worm turns the harder this push will be until friction brings everything to a stop. The collar O is made of greater' diameter' on one side than on the other, so that on the incline and cause the climbing and pinching above described. \Vith a single incline this action will only take place when the worm is turned in one direction; but with a double incline any motion proceeding from the worm would be arrested by the brake at once. 0f course in a crane the motion would only be from the running down ofthe load; but there are some cases where there will he a hook at either end of the chain, and in such cases a double incline may be used, being only a dnplicate in principle and construction of that illustrated, and therefore not necessary to be further explained. Thus I provide that any motion ot' the shaft in either direction, produced by the hand-wheel, will lift or lower the load, and any motion ot' the inner part of the shaft, produced by running down ofthe load, will immediately cause a strain against the ends of the inner shaft-bearings, such as easily to resist the rotation of the shaft caused by the load, or by any force operating primarily upon the inner end of the shaft instead of the outer end.

Having thus described my improvements, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination of the two hand-wheels C and D and their pull-chains with the worms, worm wheels, chain wheels, and hoistingchain, whereby four different speeds ot' hoisting and of lowering maybe obtained, substatitially as set forth.

2. In a crab for a traveling crane, the combination of worm-wheel hoisting mechanisms and traversing mechanism, substantially as set forth.

3. The combination of the two parts of the shaft E with the driver and the fixed collar M and loose collar O, adapted to le engaged by the driver to turn the shaft in either direction, substantially as set forth.

4. The combination of the two parts of the shaft E with the driver and the fixed and loose collars M and 0, adapted to be engaged by the driver to turn the shaft, the adjacent faces of the collars being inclined, as setforth, and the part of the shaft carrying the collars being held against longitudinal motion, slibstantially as set forth.

5. The combination of the shaft and the fixed and loose collars M and O, having inclined adjacent faces, and so constructed and arranged that the loose collar is wedged against a tirm stop in operation andthe shaft is held against longitudinal movement, whereby a brake is ap plied to stop its rotation, snbstaiitially as set forth.

In testimony whereof I have hereunto subscribed my name.

THOMAS W. GAPEN.

Witnesses:

H. S. MoGoNKEY, SCHUYLER MERRrr'r.

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