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Publication numberUS301096 A
Publication typeGrant
Publication dateJul 1, 1884
Filing dateDec 10, 1883
Publication numberUS 301096 A, US 301096A, US-A-301096, US301096 A, US301096A
InventorsGeorge P. Clemons
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 301096 A
Abstract  available in
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Description  (OCR text may contain errors)

(No Model.) 2 Sheets-Sheet l.



N0.v 801,096. r lPaJtented July 1, 1884.

, MW N iKEfE 7 %VENTOR ATTORNEY (No Model.) 2 Sheets-Sheet G. P. OLEMONS.


No. 301,096. Patented July 1,1884.



EPECIFICATION forming part of Letters Patent No. 301,096, dated July 1, 1884-.

Application filed December 10, 1883. (No model.)

15b all whom it may concern:

Be it known that I, GEORGE F. CLEMoNs, a citizen of the United States, residing at Springfield, in the county of I'Iampden and State of Massachusetts, have invented new and useful Improvements in Gar-Brake-Operating Mechanism, of which the following is a specification.

This invention relates to improvements in car-brake-operating mechanism, the object be ing to provide more powerful means than have heretofore been available for applying the brakes to car-wheels, and which are capable of being so operated as to let the brakes ofi suddenly, as by ordinary brakes, or to put on and let off the brakes by turning the brake-wheel in both directions, and to provide mechanism for operating car-brakes which is (after the brakes are put on) adapted in itself, withoutthe aid of pawl and ratchet or other similar retaining device, to resist the brakestrain.

In the drawings forming part of this specifil cation, Figure 1 is an end view of a part of a car having applied thereto brakeoperating mechanism embodying my improvements. Fig. 2 shows a part of the car-platform and the brake mechanism, partly in section. Fig. 3 is a plan View, partly in section, of a part of said operating mechanism. Fig. 4 illustrates a modification of the brake-holding devices shown in Fig. 1. Fig. 5 is aside View of the brake devices, showing the manner of applying them to a car when no stop devices are used. Fig. 6 is a plan View of Fig. 5.

The main operating mechanism, herein shown and described as operating in conjunction with the ordinary brake shaft and wheel and brake-chain, is that shown and described in my patent dated May 1, 1883, for apparatus for transmitting differential rotary motion, to which reference may be had. The said pat ented mechanism consists, substantially, of the perforated disk a, in this device having a hub, a thereon, to which one end of the chain c is secured, and around which the latter is wound when the brakes are puton by turning shaft 0, as usual; also, of a pinion, 0, located above said disk, and carrying on its under face a series of studs, b,which enter the perforations in disk it; also, of an eccentric, c fixed in this device on the brake-shaft c, which, when said ing. Said gear (2 in Fig. 1 has its exterior 6o provided with a series oi'teeth resembling gearteeth, between which a rocking spring-actuated stop, h, is held. This internal gear takes the whole of the brake-strain after the brake shaft 0 has been turned in the ordinary way to 65 wind the chain c in putting on the brakes around the hub 11*. To let off the brake suddenly, letting the strain on chain c act to turn hub if, as it ordinarily does a common brakeshaft, the operator places his foot on the arm of the stop h, disengaging the latter from between said teeth on gear (Z, and letting the internal gear turn-with shaft 0, together with pinion o'and disk a.

In Fig. 4. is shown the ordinary pawl-andratchet device commonly in use on car-brakes adapted to hold the gear (I.

Fig. 5 illustrates the manner of hanging this device on a car when the hub n is to be turned by the brake shaft and wheel, both to put on and let off the brakes. In this case gear 01 is provided with an arm, (P, which is bolted rigidly to the car. A support, to, or other suitable device is put on the car under gear (Z, to hold the latter and hub a against the strain of 8 chain c. The hub of on disk at in the construction shown in Fig. 1 is held in place by a strap, 5, as shown, bolted to the edge of the platform, and the lower end of the shaft 0 turns in the ordinary brace, (5. The turning of the eccentric c in pinion 0 gives a rotary motion to the hub a, the speed of the latter being about one turn to five of the eccentric, more or less; but no amount of force exerted upon hub a by the brake-chain can rotate it when the gear (1 is held fast, for the disk at is thereby turned against the studs 1) 011 pinion 0, and the axis of the latter is eccentric to that of the disk a, and the periphery of said pinion en gages with the internal gear, (I, which, when. I

not allowed to turn, prevents the intermediate 2. In combination, the gear d, rigidly secured 10 parts from rotating. to a car, the brake-shaft a, and eccentric 0 the What I claim as my invention is 'disk at, having hub n thereon, and the pinion 1. In combination with the brake-shaft c and 0, substantially as set forth. eccentric 0*, the perforated disk at, having hub GEORGE F CLEMONS n thereon, the pinion 0, provided with studs 1), the internal gear, (1, and a suitable stop to Vitnesses:

prevent it from rotating and to release it, H. A. OHAPIN, substantially as set forth. i J. D; GARFIELD.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4301693 *Apr 12, 1978Nov 24, 1981Stanley Richard BHand brake for railroad cars
US4920811 *Mar 7, 1989May 1, 1990The British Petroleum Company P.L.C.Mechanical actuator for moving a shaft
Cooperative ClassificationF16H1/32