US711084A - Car-brake. - Google Patents

Description

J. TUNER.

CAR BRAKE.

(Application med Mar. 4, 1902.)

(No Mod-el.)

Patented ont. |4, |92.

UNITED STATES l PATENT OFFICE.

JOSEPH TONER, OF PITTSBURG, PENNSYLVANIA.

CAR-BRAKE.

SPECIFICATION forming part of Letters Patent No. 711,084, dated October 14, 1902..

Application filed March 4. 1902. Serial No. 96,626. (No model.)

sylvania, have invented a new and useful Im provement in Car-Brakes, of which improvement the following is a specification.

This invention relates to certain new and' useful improvements in car-brakes, and relates more particularly to brakes for streetrailways and the like.

The present invention has for its object theprovision of novel means whereby an emergency-brake is provided that will cause the car to stop almost instantaneously.

It is a Well-known fact that many accidents are caused at times when the rails are wet or covered with ica-thereby causing the wheels to skid upon the rails When the brakes are applied to the periphery of the Wheel.

It is the Object of the present invention to overcome this difficulty and to provide an emergency-brake that will bring the car to an almost instantaneous stop when the occasion requires.

My invention has fora furtherobject to provide an emergency-brake constructed upon the principle of a chock-block that will engage both the tread and iiange of the wheel and will likewise engage the flange and tread of the rail and road-bed, thereby bringing the car to an instantaneous stop and also prevent flat Wheels, as is now the case.

A still further object of the invention is to provide a brake of this character which will be extremely simple in construction, strong', durable, comparatively inexpensive to manufacture, and highly efficient in its use.

With the above and other objects in ViewY the invention consists in the novel construction, combination, and arrangement of parts to be hereinafter more fully 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, and wherein likenumerals of reference indicate like parts throughout the several views,in whichm Figure 1 is a side elevation of a portion of a truck with my improved brake mechanism attached thereto and showing the same in its normal position. Fig. 2 is a similar View showing the position of the mechanism when the brake is applied. Fig. 3 isa perspective view of one ofthe brake-shoes orchock-blocks.

The platform of the car 1 has pivotally secured Vthereto in a suitable bearing 2 an operating-lever 3, carrying a gravity-pawl 4.,which engages in the ltoothed rack 5, securely attached to the platform of the car. This operating-lever 3 extends through a suitable opening formed in the platform of the car and is pivotally connected at 6 to an operating-rod 7, which extends radially to the bell-crank lever 8 and is pivotally connected therewith. This bell-crank lever 8 is pivotally secured at 9 in the hanger 10, secured to the under face of the car. To the other end of the bellcrank leveris attached pivotally a brake-shoe or chock-block 11, which is bifurcated, as shown at 12, to form a pivotal connection with the bell-crank lever. This brake-shoe or chock-block 11 is secured to a spring 14C near its upper end, said spring .being also secured at 15 to the under face of the car. The brake- Shoe or chock-block is provided with a ridge 1 6 on its upper face and carries fingers 17 17, between which the ange of the Wheel extends. The under'face of the flanges of said chockblock is corrugated,as at 18, and this corrugated face is adapted to contact with the roadbed or rail.

When it is desired for the car to make an emergency stop, the operating-lever is operated to the position as shown in Eig. 2 of the drawings, thereby causing the brake-shoe or chock-block to extend under the wheel and engage the same. vThe wheel will ride up to the ridge 16, and the roughened or corrugated under face 1S of the shoe will firmly grasp the roadbed and will likewise engage the Wheel, thereby causing an almost instantaneous stop.

It will be understood that there are bellcrank levers arranged on each side ofthe car, and these are connected together, and that a brake-shoe is provided for each forward Wheel of the truck. The spring 14. serves to return the brake-shoe toits normal position after the motor has been reversed and the car-wheels again brought upon their former position upon the rails.

The many advantages obtained by the use of my improved device will be readily appar- IOO ent from the foregoing description, taken in connection with the accompanying drawings, and 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-

l. In a car-brake, the combination of brakeshoes or chock-blocks carrying extending ngers between which the iiange of the wheel engages, a ridge to limit the movement of said wheel, a corrugated under face on said brakeshoes to engage the rails and road-bed, means to operate said brake-shoes, and means whereby said brake-shoes are returned to their normal position, substantially as described.

2. In a car-brake, the combination of an op- JOSEPH TONER.

In presence of- LoUIs MoEsER, M. HUNTER.

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