US249226A - Car-brake - Google Patents

Description

UNrrEn STATES PATENT. OEI-nono PETER M. EALroN, E EvEE'soN, PENNSYLVANIA.

CAR-BRAKE.

SPECIFICATION forming part of Letters Patent No. 249,226, dated November 8, 1881.

v Application filed April 16, 1881. (No modeLl To all whom it may concern: v

Be'it known that I, PETER M. 'DAL'rorn of Everson, in the county of' Fayette and State of Pennsylvania, have invented a new and useful Improvement in Railroad-Brakes; and I do hereby declare the following to be a f ull, clear, and exact description thereof, reference being had to the accompanying drawings, forming a part of this specification, in which-- Figure lis aplan view, showing myimproved brake as it may be applied to railroad-cars. Fig. 2 is a side elevation of the draw-head and spring as adapted to my invention.` Fig. 3 is a detached plan view of the auxiliary spring on the end of the draw-head beam as adapted in my invention. Fig. 4 is an end view of the same; and Fig. 5 is a plan view, showing the side of the saine without the spring.

Like letters of reference indicate like parts in each.

My invention relates to that class of brakes for railroad-cars` by means of which the engineer can control the motion of the train; and it consists in certain combinations-with the brake-lever, brake rod or staff, and brake-chain or like exible connection between the brakelever and brake-staff, of a movable or sliding draw-head, which acts directly upon the brakechain, and of fulcra arranged upon the car-bed in the path of the brake-chain, and with relation to the movable or sliding draw-head, so that the direct thrust of the draw-head shall take up the slack of the brake-chain and by its direct action apply the brakes, and in com bining with the movable draw-head a relief-sprin g arranged on the rear end of the saine, to prevent the rupture of the brake-,chain .by the sudden thrust of the direct-acting draw-head, all as will hereinafter more fully appear.

I will now describe my invention according to the modification shown in the drawings.

a represents a portion of the bed of a railroad-car 5 b, the wheels c, the axle 5 d, the drawhead; c, the spiral spring in the cylinder; e', cylinder which is lattached to the frame of the car, the purpose of the spring e being to act as a cushion when the draw-head is pushed in by the cars coming together.

f is an extension of the draw-head beam, on which, beyond the spring c and cylinder e', is a collar, g. Beyond this collar g isa cylinder, h, through which the end of the draw-head beam passes. Inside of this cylinder is a spiral spring, t', and at the end of the cylinder next the collar g is a disk, 7c, which rests against the spring in the cylinder. Beyondthe cylinder 71l are two pulley-wheels, Z l, attached to the frame of the ear; and between and beyond these wheels is another pulley-wheel, m, which is pivoted in a U-beam, n, which extends from the far end of the cylinder h.

o is the brake-lever, which may be ot' the usual form.

p is the` brake-chain, which passes from the brake-lever o over the frontot' the wheel l; thence over the back of the wheel m in the U- beam n, and 'thenceover the front of the wheel l, to the brake-rod q, which may be of the usual v form, extending to the top or side of the car.

The operation of this deviceis as follows: The chain p being wound around the brake-rod q sufficiently to take in the slack, when the engineer desires to put on the brakes he applies the brake tothe engine, which causes the cars of the train to push a gainsteach other by reason of their momentum. This thrusts in the drawheads, the spiral spring c offering sufficient resistance to prevent a jar which would injure the cars. The collar f pressing against the disk 7c carries the cylinder g, U-beam n, and wheel m with it, which Wheel In draws the chain o, and thereby moves the brakelever q sufficiently to put on the brakes, orcauses them to press against the wheels b of the car. The spring 'i acts as a cushion to prevent the sudden thrust of the draw-head beam from breaking the chain p, and also to prevent more than a certain amount of strain being put on the chain p after the brakes are applied. By the arrangement ot' the pulley-wheels l, L', and m the portion p of thechain p is caused to move twice the distance traveled by the wheel n; and by attaching the end of the chain p to the brake-lever o at a point nearer the fulcrum, the distance over which the lever will travel may be increased. In order to release the brakes the engineerhas simply to start his engine.

When it is desired to back the train without at the same time putting on the brakes, the brake-rod q should be released, thereby slacking the chain p sufliciently to prevent the brakes beingapplied by the inward thrust-of the drawhead. By this arrangement of the different parts the brakes may be put on one or all of IOO d, gggg y y j "brakerod in the usual manner.

the cars in the train by the inward thrust of the draw-head, as this thrust does not apply' brakes have been applied by the brake-rod,

and the draw-head should be pressed in by two cars coming together, the force will be taken up by the spring i, and thereby prevent the chain or other parts of my device from being broken; or an eXtra chain maybe used, by means of which the brakes maybe applied by the brake-rod without tautening the chain p.

The advantages of my invention are that it is simple, cheap, and easily applied. By its use the engineer can have complete control over the train, and can by simply shutting off the steam and applying the brakes to the engine and tender cause the cars ofthe train to come together, and thereby quickly bring them toastand-still. Byitsusethenumberofbrakemen needed on a train will be reduced, and the liability to accidents lessened.

What I claim, and desire to secure by Letters Patent, is-

1. The combination, in an automa-tic carbrake, of a brake-lever and a brake-staff, the two directly connected by a brake-chain or like 2&9226

eXible connection, fulcra arranged on the carbed in the path of the brake-chain, and a sliding draw-head arranged to act directly on the brake-chain and take up the slack thereof by forcin g the chain between or around the fulcra. the several elements being relatively arranged and coactin g substantially as and for the purpose specilied.

2. The combination, with the brake-lever, the brake rod or staff, and the brake-chain or eXible connection between the same, of the movable draw-head having a pulley on its rear end, and the two pulley-wheels arranged in the path ofthe brake-chain and lon either side of the movable draw-head, substantially as and for the purpose specified.

3. The combination, with the brake-lever, brake-chain, and fulcra located on the frame of the draw-head in the path of the brake-chain, of a movable draw-head having at its inner end the pulley-wheel and spring relief mechanisrn, substantially as and for the purpose specified.

In testimony whereof I have hereunto set my hand. I PETER M. DALTON.

Witnesses:

JOHN F. KAINE,

R. W. P. RIonARDsoN.

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