US608429A - Automatic car-brake - Google Patents

Description

Patented Aug. 2, I898. r. A. PERRY. 7 AUTOMATIC CAR BRAKE.

(Application filed Nev. 10, 1897.;

2 Shanta-Sheet I.

(No Model.)

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No. 608,42'9. Patented Aug. 2, I898. F. A. PERRY.

AUTOMATIC cAn BRAKE.

(Application filed New. 16, 1897.)

2 Sheets8heet 2.

(No l'lodel.)

UNITED STAT S-- PA 'I ENT OFFICE.

FREDERICK A. PERRY, OF EAST LIVERPOOL, OHIO.

AUTOMATIC OAR-BRAKE.

SPECIFICATION forming part of Letters Patent No. 608,429, dated August 2, 1898.

' Amman fil d November 10, 1897. Serial no: 658,006. (No model.)

To aZZ whont it may concern:

Be it known that I, FREDERICK A. PERRY, a citizen of the United States of America, residing at East Liverpool, in the county of O- lumbiana and State of Ohio, have invented certain new and usefulImprovements in Automatic Oar-Brakes,ofwhich the following is a specification, reference being had therein to the accompanying drawings.

This invent-ion relates to certain new and useful improvements in car-brakes, and relates more particularly to that class known as emergency-brakes, having for their ob-' ject to suddenly check the speed of the car when the same is beyond the control of the ordinary braking mechanism. The principal features of my invention consist of a shaft which carries upon its ends the brake-shoes and is supported from the car-body by a novel mechanism which when released allows the brake-shoes to fall into engagement with the rail. The descending of this shaft draws a clevis or hook into engagement with T- shaped catches which are secured in a collar rigidly mounted to the car-axle, and through this means drawing the brake-shoesfirmly under the wheels, so as to be engaged by the same, all of which will be hereinafter more particularly described, and specifically pointed out in the claims.

In describing the invention in detail reference is had to the accompanying drawings,

forming a part of this specification, wherein like letters of reference indicate similar parts throughout the several views, in which- Figure 1 is a longitudinal sectional view of a portion of the car,'showing my improved brake in position thereon. Fig. 2 is a crosssectional View of the car with the brake in position. Fig. 3 is a top plan view of the brake in position on the car. Fig. 4 is aperspective view of the double brake-shoe. 5 is a perspective view of a portion of the chain and its supporting-casing. Fig. 6 is a perspective view of a portion of the car-axle with the guide-collars mounted thereon.

Referring now to the drawings by reference-letters, Ct represents the car-axle, which has centrally afiixed thereto a sleeve 1), which carries aseries of T- shaped hooks 0, arranged entirely around the same, the purpose of Fig.

which will be hereinafter more fully described. r -Ar1 anged underneath the car-body d and operating in keepers 6, supported by said body, is a barf, having affixedthereto arms 9, extending at an angle and operating in keepers h, which are also attached to the underneath side of the car-body. On the upper face of these arms g are secured keepers 75, which are adapted to receive the hook ends'l ofthe hangers m, which support the shaft n, carrying the brake-shoes. These brake-shoes are formed in two sections a and (1, the latter of which is provided on its inclined face with a groove a which is adapted to receive the fiangeof the car-wheel, the said shoe a being loosely mounted on the shaft 41. The shoe a is supported on the screw-threaded end n of the shaft'and is provided with a projecting tongue a, adapted to receive the car-wheel and permit the same to ride forward onto the shoe. The shaft n has rigidly mounted thereon two collars 0 and has attached thereto between these collars a double chain 1), which has attached to its free end a clevis or hook g, which is adapted to engage the T-shaped hook c whenbrought into engagement therewith. This chain 1) passes through the sleeve or casing 0, carrying a wire 1", to which is-attached a spring 8, having a cord 25 attached. thereto, which passes over a pulley t, supported from the car-body, and havingits other end divided into branches connecting both to the shaft between the collars and to collars n mounted on the'sllaft outside of the collars o. The chain winds upon the sleeve 1) between two collars or disks 1), rigidly affixed either on the axle or on the said collar 1) at the ends thereof. As the chain 19 is wound on thesleeveb it turns the which passes through both shoes, the said arm b being .pivotally connected to a lever c, which is in turn pivotally connected to the lever 0 the upper end of which is secured by a hinge c to the car-body. The bar f is adapted to be fastened at one end of the car by any suitable mechanism which can be readily released, and at the other end of the bar is attached a stiff coil-spring f', the other end of which is secured to a stop f attached to the car-body.

The operation is as follows: Assuming that it is desired to employ the emergency-brake, the operator releases the mechanism which holds the bar f, allowing the springf, which in the normal position of the brake has been extended, to draw the bar f toward itself and moving the arms r/ in the same direction, and thus withdrawing the supports for thehangers 111, which support the shaft n and the brake-shoes. This allows the brake-shoes to fall intoengagement with the rail,and through the shaft n, descending therewith, also pulls the cord so as to cause the same to lift upwardly on the casing r and draw the hook or clevis 1 into engagement with the T-shaped hooks 0, one of which it engages, and as the axle continues to revolve the chain 2) is unwound from the axle n and wound upon the sleeve I), that is mounted on the axle a. As these brake-shoes descend they also cause the pivoted levers c and c to move to the inclined position that is shown in dotted lines in Fig. thus holding down the rear of the brake-shoe and retaining the brake, so as to permit the car to ride upward onto the same. As the shaft 91 is turned by the chain unwinding from the same it draws the outer shoe (1 toward the car-wheel and causes the same to bind firmly against the head of the rail, also producing a uniform wear of the shoe (0 against the entire face of the tread of the car-wheel. This gripping of the rail, together with the insertion of the projecting tongue a under the ear-wheel, so as to permit the same to ride up onto the brake-shoe, will serve to instantly check the speed of the car and bring the same almost to a sudden stop.

It will of course be understood that this brake is to be used only when the car is beyond the control of the ordinary braking mechanism employed therefor, and is adapted to be attached to the car in a manner so as to not in any wise interfere with the same.

\Vhen the emergencybrake has been used, it will be necessary to move the car backward, so as to permit the elevating of the shoes and the unwinding of the chain from the shaft a and the shaft n and for engaging the hangers in their keepers on the supports 5 as heretofore described.

It will. be noted that various changes may be made in the details of construction without departing from the general spirit of my invention.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. An emergency-brake, comprising ashaft supported from the ear-body, a movable brake-shoe, and a brake-shoe loosely mounted upon said shaft, and means for drawing the brake-shoes into engagement with the wheels when the same are lowered to the rails, substantially as shown and described.

2. In an emergency-brake, a shaft supported from the ear-body, brake-shoes mounted on said shaft, a chain attached centrally to the shaft, and a cord connected to said chain and shaft, in combination with the caraxle having a series of hooks mounted thereon to engage said chain and wind the same on the car-axle when the brake-shoes are lowered into engagement with the rails, substantially as shown and described.

3. In combination with a car-axle having a sleeve mounted thereon, which carries a series of hooks, a shaft carrying near each end a movable brake-shoe, and a brake-shoe loosely mounted thereon, means for supporting said shaft, a chain attached thereto, said chain carrying a clevis, means for drawing the same into contact with the hooks on the car-axle when the shaft is lowered, and an operatingbar to release the brake-shoes and permit the same to fall into engagement with the track, substantially as shown and described.

4C. An emergency-brake, comprisinga shaft having a movable shoe and a shoe loosely mounted thereon near each end, supporting means for suspending said shaft and shoes from the car-body, means for releasing said support to permit the shoes to engage the rails, and means whereby the movable shoes are drawn toward the shoe loosely mounted on the shaft when in engagement with the rails, substantially as shown and described.

5. In an emergency-brake, a shaft sup ported from the carbod y, a movable shoe and a shoe loosely mounted on said shaft near each end; a chain secured to said shaft and carrying a clevis, hooks secured to the caraxle, means for drawing said chain into eontaet with the hooks, connections between the brake-shoes and the car-body, screw-threads formed on the ends of the shaft whereby the movable shoe is drawn toward the shoe loosely mounted 011 said shaft, substantially shown and described.

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

FREDERICK A. llC tltY.

\Vitnesses:

A. M. WILsoN, Tnos. M. Born, Jr.

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