US728654A - Safety attachment for car-breakes. - Google Patents

Description

ATENTEB MAY 19, 1903.

I L. s. BABBEB. SAFETY ATTACHMENT FOR cAB BRAKES.

APPLICATION FILED FEB. 5, 1903.

H0 MODEL.

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- UNITED STATES Patented May 19, 1903.

j PATENT j OFFICE.

LENVIS S. BARBER, OF GREENSBORO, NORTH CAROLINA, ASSIGNOR OF ONE- HALF TO JOHN P. JOHNSON, OF GREENSBORO, NORTH CAROLINA.

SAFETY ATTACHMENT FOR CAR-BRAKES.

I SPEGIFICATIONjforming part of Letters Patent No. 728,654, dated May 19, 1903.

Application filed February 5, 1903. Serial No. 142.048. (No model.)

To all whom, it may concern:

Be it known that I, LEWIS S. BARBER, a citizen of the United States,'residing at Greensboro, in the county of Guilford and State of North Carolina, have invented a new and useful Safety Attachment for Car-Brakes, of which the following is a specification.

My invention relates to automatic means for applying the air-brakes of railroad-cars upon the car-wheels leaving the track, and it consists in the various feat-ureshereinafter described and claimed.

In the accompanying drawings, Figure 1 is a vertical transverse section of a car-truck to which is applied one embodiment of my invention. Fig. 2 is a vertical longitudinal section therethrough, and Fig. 3 is an enlarged sectional detail of the lever.

Similar characters indicate like parts throughout the several figures of the drawlugs.

Some usual form of car-truck is designated by the letter T, it having the bolster b, axles a a, and pairs of wheels w w. Just inside each pair of wheels is a horizontal stay 10, curved at its ends 11 to partly encircle the axle and having depending projections 12 from said ends. It is supported at its center from the bolster by pairs of loops or hangers 13 13, through'which it passes. The hangers may be secured together to hold the stay fast by bolts 14, passing through openings 'at or near the bottom of each', and the curved ends of the stay are shown as braced by inclined bars 15, bolted to them.

Pivoted by a bolt 16 upon each stay projection 12 is a lever 17 of suitable form, with its lower end in proximity with the wheel and a less distance from the top of the rail than said top is from the cross-ties. This lever at its upper extremity carries a disk 18, preferably of rubber or like elastic material, which coacts with and closes an opening in an elastic ring or gasket 19, mounted upon the end of a transverse pipe 20, which constitutes an extension from and is joined to the train-pipe 20 of the air-brake system by a preferably It will be seen that should the car ortruck leave the rail one of the'levers upon the side at which the Wheel takes the outer side will at once contact with the railor other relatively fixed object, this, as a result of the location ot the lever, occuring before the wheel strikes the road-bed. By this contact it will be swung rearwardly about its pivot to the position shown in dotted lines in Fig. 2, carrying its upper end off the end of the pipe 20, admitting airto the system, and by the consequent destroying of the vacuum in the trainpipe applying the brakes of the entire train. This will bring it to a stop and will prevent the leaving of the road-bed proper and the occurrence of such accidents as the cars going over embankments. 7

Having thus described my invention, I claim- 1. The combination with a car-truck and the train-pipe of an air-brake system having an opening to the external air, of a lever movable by contact with a relatively fixed object when the wheel leaves the track, and an elastic member carried by the lever and normally closing the opening in the air-brake system.

2. The combination with a car-truck and the'train-pipe of an air-brake system, of a support carried by the truck, an extension from the train-pipe mounted on the support,

and a lever pivoted to swing upon the sup- I truck at each side, extending in proximity to In testimony that I claim the foregoing as the axles and provided with a projection bemy own I have hereto affixed my signature in low the axle and near each wheel, a transthe presence of two witnesses.

verse extension from the train-pipe carried LEWIS BARBER. 5 by the stays, and a lever pivoted to each sup- Witnesses:

port and coacting with the train-pipe exten- JOHN W. BRADY,

JOHN M. STONE.

sion.

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