US1508971A - Mine car - Google Patents

Description

2 N fnvenfor MINE CAR J. A. HEBB ET AL Original Filed Nov. 6,

Sept. 16

NNMWN R E V5574; asses:

Patented Sept. 16, 1924.

UNITED STATES PATENT OFFICE.

JOHN A. HEBB, 01E HOPWOOD, AND WILLIAM J. MGDADE, OF UNIONTOWN,

PENNSYLVANIA.

MINE CAR.

Original application filed November 6, 1919, Serial No. 336,025 Divided and this application filed October 6, 1920. Serial No. 415,066. i

To all whom it may concern.

Be it known that JOHN A. HEBB and WILLIAM J. MODADE, citizens of the United States, residing at I-Iopwood and Uniontown, respectively, in the county of Fayette and State of Pennsylvania, have invented certain new and useful Improvements in Mine Cars, of which the following is a specification. v

Our invention consists of an improvement in mine cars, and particularly in the braking mechanism therefor. It has in view to provide means for braking the car from eitherend so as to avoid the necessity of standing on the front end of a car with the attendant risks. Ordinarily, mine car brakes are operated through levers, cranks, and rigid pitmen, so that if a braking lever is mounted at either end of a car and connected with the brake shoe mechanism, operation of either lever will transmit undesired movement to the other, resulting in jamming or straining of the parts, or the necessity of releasing before action. Our invention obviates all such objections, and renders it possible to operate the brakes from either end without disturbing the operative lever at the other end. p We have shown the operating levers at each end portion of the car, at divergently opposite side portions thereof, connected to cross rock shafts adapted to transmit the braking pressure through the connected mechanism hereinafter described. Wealso show a modified arrangement of levers, one at the side near the end of the car, and the other arranged across the opposite end, and each connected to common actuating mechanism. I

Thepresent invention is a division of the subject matter of our prior application Serial No. 336,025 filed Novemberfi, 1919.

I In the drawings, illustrating preferred embodiments of the invention:

Fig. 1 is a side view in elevation of a mine car provided with our improvement;

Fig. 2 is an end view of the same;

Fig. 3 is a perspective detail view showing the actuating connection between the leverand rock shaft;

Fig. 4 is a similar view showing'a modified arrangement utilizing, a side lever and an end lever at opposite end portions of the car.

Referring to the drawings, 2 is the body of the car of usual. design, mounted on wheels 3 and provided with a brake shoe 4 at each side, of well known form. Said shoes are mount-ed for vertical adjustment towards and from the wheels 3 by abolt 5 and a connected lever 6? of a rock shaft 7 The rock shaft is mounted in suitable bearings 8 along the sides of the car, and each rock shaft has at each end a lever arm 9 for operation together'by either one of two main leverslO and theinterposed mechanism shown. Car 2 is of the end dumping type, for which reason the levers 10 are located at the diagonally opposite sides of the car, one near each end and within reach of an operator standing on the end platform. Each lever 10 is connected to a cross rock shaft 15 extending, across under the car at each end, in bearings 16 and has a lever arm l3 'simila'r to arm 13*. Each arm is connected by chain 14 to arm 9 'of the rock shaft at each side ofthe car, so that operation of either lever 10 'will simultaneously exert tension on the chains and actuate both rock shafts 7 to depress the brake shoes to engage the wheels. Levers 10 are mounted in guards 12 and suitable ratchet or other type of holding mechanism may be employed therewith, if desired.

7 In the drawings, both the levers 1 0 are shown in released position. In order to set the brake, the operator has only to pull the 7 lever 10 nearest him toward the end of the car. This will rock cranks 1 3? and v13 downwardly, pulling down on the flexible connections on chains 14?, moving. cranks 9 onfshafts 7 a in a corresponding direction.

Such movement of cranks 9 rocks shafts 7 a in a direction to force .bolts 5 downward,

thereby causing shoes. P to engage .the wheels. Once a lever 10?, is so moved, it may be held in set position byteeth on members 12* until released. I l

By reason of the flexibleconnections 14 'm'ovement of'one'lever10?" will not effect ing Wheels, of a brake therefor including actuating mechanism movable in atransbrake shoes, operating mechanism for the Verse dlrectlon for actuating said brakes.

brake shoes, a lever near one end of the car In testimony whereof We hereunto aflix 10 connected with said operating mechanism our signatures. 5 movable in alongitudinal direction for actuating the brakes, and a Second lever at JOHN A. HEBB. the other end of the car connected With said WILLIAM J. MODADE.

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