US328963A - Car-brake - Google Patents

Description

(No Model.)

S. E. MOSHER & L. B. LYONS. GAR BRAKE. 1 No. 328,963.

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' of the car itself as a regulator of the braking UNITED STATES PATENT rrren".

SAMUEL E. MOSHER AND LABAN B. LYONS, OF OHILLIOOTHE, OHIO.

CAR-BRAKE.

SPECIFICATION forming part of Letters Patent 328,963, dated October 27, 1885;-

Application filed April 7, 1883. Serial No. 90,914. (Nomodel) V To all whom it may concern:

Be it known that we, SAMUEL E. MosHER and LABAN B. LYoNs, citizens of the United States, residing at Ohillicothe, Ross county, Ohio, have invented new and useful improve ments in Railway-Oar-Brake Mechanisms, of which the following is a specification.

Our invention relates to railway-car-brake mechanism, and is in'the nature of an improvement upon that for which we have already filed an application for Letters Patent, based upon the principle of utilizing the weight force, and embodying a form of mechanism consisting, essentially, of a system of leverage fulcrumed upon the spring-shelf and operated by a chain operating over a friction pulley pivoted upon the cross-beam of the truck. In such former application the brake itself was ahorizontal bar arranged above the wheels and acting vertically.

The object of our present invention is the application of the essential principle described in said former application to the ordinary form of brakes hung at the sides of the wheels and acting horizontally; andit consists in the combination and arrangement of parts herein more fully described.

Mechanism embodying our invention is illustrated in the accompanying drawings, in which- Figure 1 is a plan diagram view of the springshelfof a car-truck,showing the arrangement of themain levers and the draft-chain connection. Fig. 2 is an end view of the car-truck, showing the arrangement of the main levers and the draft-chain connection. Fig.3 is a side view of the truck, showing the arrangement of the bell-crank brake levers. Fig. 4 is a crosssection of the truck-frame, swinging bolster, and spring-shelf, showing the attachment of the frictionpulley for the draft-chain; Fig. 5, a plan diagram of a ear-truck, showing a modified form of mechanism applicable to brakes arranged at the extreme outer sides of the contiguous truck-wheels. Fig. 6 is an end view of the same truck, showing the main 1evers and their actuating bell-crank connections; and Fig. 7, a side View of the truck crosssectioned through the frame and movable bolster and spring-shelf, showing the bellcrank connections with the brakebeams.

The partsdescribed herein areindicated on the drawings by letters of reference.

WV WV designate the wheels of the truck; R R, the crossbeams of the frame; S, the swinging bolster, and s the springshelf, all constructed and arranged in the usual manner.

Upon the spring-shelf s we arrange two levers, A A, longitudinally with the shelf, and securely fulcrumed thereon bylinks or brackets a. To the inner ends of the levers A, which are contiguous, a chain, P, is attached by its two ends, passing thence upward and over two grooved frictionrolls, C G, pivoted in brackets secured to the under side of the cross-beams R R, as shown in Fig. 2. In the bight of the chain the connection is made with the rod b or piston of the air-cylinder by means of an equalizing friction-roller, E, by which arrangement of parts the horizontal movement of the rod or piston b lifts theinner ends of thelevers A and depresses the outer ends of the same. The outer ends of the levers A are connected by links 0 with the horizontal arms of hellcrank levers B, swung in pivotal bearings t0 the under side of the cross-beams R B, there being one bell-crank arranged for each wheel, carrying a pivoted brake-shoe, B, at the eX- tremities of the vertical arms. Thus the depression of the outer ends of the levers A carries down the horizontal arms of the bellcranks B and forces thevertical arms carrying the brakeshoes against the wheels.

It will be readily obvious that no greater force can be applied to the brakes than would be sufficient to lift the car since any such excess would expend itself in lifting thespringshelf 8 through the lever A and its connection with the spring-shelf.

In the case just described, the brakes are arranged between contiguous wheels acting outwardly; but as brakes are often arranged at remote sides of contiguous wheels acting inwardly or toward each other a modification in the arrangement of the mechanism is necessary. A preferable arrangement is shown in Figs. 5, 6, and 7, in which a brake'chain, N, (corresponding with P of Fig. 1, and similarly operated,) passes between two vertically-pivoted friction-pulleys, M M, arranged upon the upper side of the cross-beam 1%, extending thenceoutward, and connected at its ends with bell-crank levers L, pivoted horizontally at ICQ each end of the framebetween the cross-beams R R, beyond the swinging bolster S. The horizontal arms of the bell-cranks L are connected by short links or chains d, with the outer ends of levers F, fulcrumed upon the springshelf. The latter are constructed and arranged anism the power is applied in substantially the same manner as first described, the changes being merely of arrangement, caused by the different position of the brakes.

Having described our invention, we claim and desire to secure jointly by Letters Patent- 1. The combination, in railway-car brake mechanism, of levers A, pivoted to the springshelf, and bell-crank brake-levers hung t0 the cross-beams, connected and operated substantially as and for the purpose specified.

2. The levers A, pivoted to the spring-shelf s, and bell-crank brake-levers B, in combination with the chain P, pulleys O O and E, substantially as set forth.

In testimony whereof we have hereunto set our hands in the presence of twosubscribing witnesses.

SAMUEL E. MOSHER. LABAN B. LYON S. Witnesses:

IRA MosHER, E. K. MIoK.

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