US98716A - Improved railway-car brake - Google Patents

Description

E. SLATER.

Car Brake.

Patented 1an. 11, 1870.

.Zim/azz for tuittd lteres ERASTUS SLATEILYOF GIRARD, PENNSYLVANIA.

LettersI Patent No. 98,716, dated January 11, 1870.

' IMPRQVED RAILWAY-CAIR BRAKE.

The Schedule referred to in. these Letters-Patent and making part of the same.

To all whom it may concern Be it known thatI, ERAsTUs SLATER, of the borough of Girard, in the county of Erie, and the State of Pennsylvania, have invented a new and useful Improvernent in Car-Brakes; and I do declare that the following is a full,`c1ear, and exact description of the construction and operation of the same, reference he-4 ing had to theannexed drawing, makingapartof this specification.

The nature of my invention consists in providing a railway-train with an apparatus whereby the brakes on the whole train can be set or unset by the engineer,

' from the cab of the locomotive.

I accomplish this by attaching to the hind axle of the drive-wheels of the locomotive, a bevel-gear wheel, which gears into a similar wheel placed on the end of a shaft which runs the whole length of the train., at right angles to the several car-axles. This main shaft is coupled between the several cars, and can be uucoupled at the same time the cars'are coupled. Y

The following is a more full description of my invention, reference being had to the accompanying drawings: V

Figure l is a transverse sectional view of that portion of my invention which is attached to thelocomotive drive-wheel axle. l

Figure 2 is a transverse sectional view of the drum on the line-shaft, and around which the chain from the brakes iswound.

`Figure 3 is a transverse sectional View of the lineshaft coupling.

Figure 4 is a vert-ical sectional view of the same.

Figure 5 is a perspective view of the brake proper, showing the drum on the shaft and the brake-chain in position.

Figure 6 is a vertical or top view of a series of car-V trucks, showing the position of my invention.

l The manner in which my invention is constructed and operated, is as follows:

I first attach to the hind axle of the locomotive drive-wheels, a bevel-gear, C.

I then hang upon t-he said axle A, a frame, B.

In this frame I place a short shaft, E, on which is 'a bevelfear, I), which gears with the gear C ou the axle A. Hence, it will be seen, that as the locomotive moves, the shaft E will he revolved.

I also hang in the frame B, another shaft, M, which is coupled with the shaft E, by a conical or frictiouclutch, F G.

rI his clutch is thrown in and outof gear by the lever Y, which is connected to the conical iron F by the yoke L, which fits the neck of the same.

The cone F revolves only when in gear; it is then revolved by the wings t L on the end of the shaft E slipping into the grooves j j in the chamber k, ir.

the cone vF. It will, therefore, be seen, that when the lever Y is drawn back, the shaft E, only revolves; but 4when it is drawn up, the clutchF G communicates 4the motion to the shaft M, which shaft traverses the whole length of the train, and is coupled between cars in such a manner as to allow of the `vibrating motion of the cars.

This I accomplish in the following manner, reference being had to igs. 3 and 4.

I construct a box, a, one end of lwhich is a ballv and-socketjoint, P, and isl securely attached to one end of a section of shafting.

The other end oi' the box a is a chamber, with four grooves, fr yr 1' 1', in its sides. On the end of the section of shaftiug to which this is to couple, are four wings, to correspond with the four grooves r r r fr, and slide in them.

O11 the sides of the box a are ltwo springs, S S, which, when compressed by the turning of the eccentric collar B, hook over the end of the box a, and grasp the shaft M back of the wings e e, &c., which are slipped into the groovesr r' r rr, and hold the shaft into the box a. YVhen it is desired to uncouple, it is done by turning the eccentric rim B", so as to allow the springs S S to spring up. On the shaft M, where it is desired to attach a brake-chain, I attach a friction-drum, around which the brake-chain is wound.

This I construct so that it will sustain a certain desired amount of strain, and when more is applied, it will slip.

It is constructed as follows, (see iig. 2:)

N -is a conical-shaped iron, which is wedged or keyed tight to the shaft.`

, T is a cylinder, fitting on to N.

N, at its smaller end, has a screw cut on it; and 0 is a burr, which screws on to it, and as it is screwed down, it shoves the cylinderdowu harder on to the cone N, producing, of course, more friction. Hence, this` device can be set to sustain more or less strain.

O' is a washer, to prevent the burr gigging back when the 'cylinder T revolves.

Fig. 5 shows the manner in which the brakes are operated. `1? and f are the brake-beams, on one of which, P', is attached the rock-shaft A', out of which extend the arms B',(Z, and h. ,y

The brake-beam f is connected with the rock-shaft A', by the connecting-bar f'. From the arm B', the brake-chain V is attached to the drum T on the'lineshaft M.' Now, as the shaft M is madeto revolve, by the action of the mechanism shown in tig. 1, the brakechain V is wound around the drum T, and the arm B is drawn up, thereby tipping the rock-shai`t A; and by the arm d and connecting-bar f the brake-bars f and P are drawn together, and when the full tension is exerted on the brakes that the drum T is set to, it

will slip on the cone N, before described. As the portion shown in fig. 1 is under the cab of the `locomotive, it will be seen, that a. lever, extending from the lever Y np into the cab, Will enable the engineer to operate the whole machine.

I do not claim a longitudinal shaft, nor the arrangement of bevelgears, nor the method of connecting ,the revolving shaft with the brake-levers; -but What- I do claim, and desire to secure by Letters Patent, is-

1. rlhe shaft M, extending by coupling through the train, connected by the clutch F G, with its operabing-lever, to the she; E, which carries the bevel-gear, as set forth.. o i

2. On lche shaft M, thus operated, the frictionclutch drum, arranged and operating in the described connections, as set forth.

3. The coupling-devicev constructed of the described parts, arranged and operating as sel; forth.

' ERASTUS SLATER.

Witnesses HENRY BALL, M. F. MCINTYRE.

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