US358547A - Pcters - Google Patents

Description

2 Sheets-Sheet 1.4

-(No Model.)

W. P. CUMMINGS.

AUTOMATIC GAR BRAKE.

No. 358,547. Patented Mer. l, 1887.

wth/moo@ (No Model.) 2 Smets-sheet 2. W. F. CUMMINGS.

AUTOMATIC GAB. BRAKE. Y No. 358,547. PatentedMaJr. l, 1887.

with@ one .n nauw/l l'o z UNiTnn drains WILLIAM F. OUlVIlVIINGS, OF BRADFORD, VERMONT.

AUTOMATIC C-iR--BRAKEl SPECIFICATION forming'part of Letters Patent No. 358,547. dated March 1, 188'?. Application filed January 13, 1867. Serial No. 224,230. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM F. CUMMINGS, a citizen of the United States, residing at Bradford, in the county of Orange and State of Vermont, have invented certain new and useful Improvements in Automatic Car-Brakes; and I hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to Which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and 'ligures oi' reference marked thereon, which form a part of this specification.

This invention relates to automatic carbrakes; and it consists in the novel construction and combination of the parts, hereinafter fully described and claimed.

In the drawings, Figure l is a plan view, from above, of portions of a car-truck provided with a brake according to this invention. Fig. 2 is a longitudinal vertical section taken on the line a* x in Fig. l.

Ais the lower part of a car-frame, provided with axle-boxes of ordinary construction.

B are the car-wheels, secured upon axles Z, journaled in the said boxes.

C is ashort sleeve having a clutch, c, secured upon the axle b. This sleeve is preferably made in halves longitudinally, held together by the band c and screws e2, so that it may be applied to any axle without removing the earwheels.

D is a long sleeve, which is mounted loose upon the axle b. This sleeve is also preferably made in halves longitudinally, which halves are held together by the bands d and screws d. One end of the sleeve D forms a clutch, d2, which engages with the clutch o when desired. A portion ol' the sleeve D forms a barrel, di, for the brake-chain to wind on. The opposite end of the sleeve is provided with the face-cam d", having the pocket d5, the use of which will be more fully explained hereinafter, and d6 are collars on the sleeve for the end of the clutch-lever to bear against.

E is the clutch-lever pivoted in the bracket e, which is secured to the center beam, a, of the frame. The lever E is provided with a forked end, e', which engages between the collars d", and e2 is a spring secured to the carframe, and to the opposite end of the lever E, for holding the clutches apart.

F is a hand-lever pivoted to the frame, and connected to the brake-lever by the eyebolt f and linkf, so that it canbe worked from the upper part of the car.

G is a hand-lever, which may be pivoted to any part of the side frame of the ear, or to another car on the train, or to the engine. This lever G is connected to the lever F or to the lever E direct by means of the cord or chain g which passes over the pulley g, pivoted in the bracket g2 on the car-frame.

H are the curved brake-blocks, provided with round stems 7a, which are carried by the plates 7L h2, -secured to the brake-beams I. The plates It are provided with eyes ha, which are pivoted on the hooks ht, projecting from the ear-frame. One brake-beam Iis provided with a hook, t', connecting with one end of the brakerod J, and the other brake-beam is provided with abracket, fi, in which alever, i2, is pivoted. One end of the lever 2 connects with the other end of the brake-rod J, and the other end of the lever is connected tothe barrel d3 by means of the brake-chain K.

M is the clutch-disengaging block, which is securely bolted to the car-frame. Nis a spring, bolted to the block M, and carrying the latchpin a on the end of it, which projects through the hole m in the said block.

The action of the brake mechanism is as follows: When the lever F or G is moved by hand so as to move the lever E for a sufficient distance against the tension of the spring e?, the forked end of the lever E causes the sliding clutch to engage with the clutch c, which is secured on the axle. The rotary motion of the axle is communicated to the barrel d3, which winds up the brake-chainK, and the brake-beams, together with the brake-blocks, are drawn together by means ofthe rod J and lever Vhen the barrel d has made :nearly a full revolution and the brakes are hard on, the spring latch-pin falls into the pocket This pocket is situated in the high part of the face of the cam di, which comes against the disengaging-block M as the cam revolves with the axle. The pressure of the block M against the cam-face draws back the sleeve D and dis- IOO engages the clutches directly the latch-pin has fallen into the pocket, so that no more of the brake-chain is .Wound upon the barrel, although. the axles continue to revolve, and the brake-blocks are held hard against the Wheels by the spring latch-pin. The brakes are relieved by simply letting go the hand-lever F or G. The spring e2 moves the lever E so that the camface slides back clear of the latch-pin, and the tension in the brake-chain and its attachments moves the cam, so that the pocket s clear of the pin, and the brake mechanism is ready to be used again.

What I claim is- 1. In an automatic car-brake, the combination of a clutch secured to the car-axle, a sleeve sliding on the axle and provided with a clutch, a winding-barrel for the brake-chain, and a cam for disengaging the said clutches, a lever for operating the sliding sleeve, and a disengaging-block for the said cam to bear against, substantially as and for the purpose set forth.

2. In an automatic car-brake, the combination of a clutch secured to the car-axle, a sleeve sliding on the axle and provided with a clutch, a Winding-barrel for the brake-chain, and a cam for disengaging the said clutches, having the pocket d5 in it, a lever for operating the sliding sleeve, a disengaging-block for the said cam to bear against, and a spring-latch secured to the said block and engaging with the pocket in the cam, substantially as and for the purpose set forth.

3. In an automatic car-brake, the combination of the revoluble axle, a clutch secured to the axle and made in halves longitudinally, the band c and screws connecting the halves of the clutch, the sliding sleeve made in halves longitudinally and provided With the clutch d2, the brake-chain barrel, and the cam d", having pocket d5, the bands d, and screws d', the disengagingbloek M, the spring latch-pin, and a lever for actuating the said sliding sleeve, substantially as and for the purpose set forth.

4. In an automatic car-brake, the combination of a revoluble axle, a clutch secured to the axle, the sliding sleeve provided With the clutch d2, barrel d3, and cam dt, havingpocket d, the disengagingblock M, the spring latchpin, the clutch-lever E, provided with the spring e2, a hand-lever connected to the clutchlever, the brake-beams provided with brakeblocks and pivoted to the frame, the brakerod, the brake-chain, and the lever i2, pivoted ou one of the brake-beams, substantially as and for the purpose set forth. f

5. In an automatic car-brake, the combination of the brake-beams provided with plates h h2, and pivoted'to the car-frame, the brakeblocks having stems h, the lever t2, pivoted on one of the brake-beams, the brake-rod connecting said lever With the other brakebeam, the brake-chain K, the sliding sleeve provided with clutch d2, barrel d, and cam (1*, having pocket d5, the clutch secured to the axle, the brake-lever E, provided with the spring e2, a hand-lever connected to the brake-lever, the disengaging-block M, and the spring latch-pin, substantially as and for the purpose set forth.

In testimony whereof I affix my signature in presence of two Witnesses.

VILLIAM F. OUMMINGS.

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