US35410A - Improvement in car-trucks - Google Patents

Description

A. BRIDGES.

Car Truck.

` No. 35,410. Patented May 27,- 1862-.`

N.PETE8, FHDTWUTMOGRAPHER. WASHINGTON. D. C.

"UNITED` STATES YPATENT EEICE.

ALFRED BRIDGES, OE NEWTON, MASSACHUSETTS, ASSIGNOR TO HIMSELF AND ALBERT BRIDGES, OF NEW YORK, N. Y.

IMPROVEMENT IN CAR-TRUCKS.

Specification forming part of Letters Patent No. 35AM), dated May 27, ISG?.

.'Z'oaZZ whom i? may concern:

Be it known that I, ALFRED BRIDGES, of Newton, in the county of Middlesex and State of Massachusetts, have invented certain Improvements in Suspending the Bolster-Beam of Railroad-Car Trucks, of which the following is a full, clear, and exact description, refer# usually constructed theV bolster of the carbody rests on a heavy beam, called the bolsterbeam,77 through which the body bolt7 or king-bolt passes. This beam has been suspended to the cross-sills by swinging bars, so that the frequent oscillations of the truck between the rails may not be communicated so directly to the car-body.

My present invention consists in applying to this swinging bolster-beam springs so arranged that while they still permit the necessary swing of the beam laterally in the truck will relieve the` concussion given to the carbody by suddenly arresting the movement of the truck along the rails, as when applying the brakes, or when the truck-wheels meet with any obstruction.A

Thatothers skilled in the art may understand and use my invention, I will proceed to describe the manner in which I have carried it out.

In the said,drawings,'A is thetruck-frame,

`which rests on lthe axle-boxes in` the usual manner. Two heavy cross-sills,lB B,extend from one side of the truck to the other between the wheels, and between' these crosssills is suspended the swinging bolsterbeam G in the following manner: From the top of each crosssill B B rises a short stud or bearing, a,

` through each pair of which passes a rod or cross'shaft,` b. Four heavy hanging bars, D, are pivoted one to each end of the rods b. The opposite ends ofthe bars D are pivoted in pairs to rods c, on which restsa plank, E, which is thus permitted to oscillate transversely of the truck. On this plank or beam are placed two heavy springs, G, (india-rubber or other,) on which the bolster-beam C rests, one spring being placed near each end of the beam, the springs being attached to the beam C and plank E. The bolster of the carbody vrests on the bolster-beam C or on a block, d, attached thereto, and the king-bolt passes through the hole e. Side bearings (either roils or friction-plates) receive the bearing of the car-body on each end of the bolsterbeam C to arrest therocking of the car-body.

Thus far the arrangement of the parts is similar to what has already been used; but it i is found in practice that where the bolsterbeam C hassufficient play between the crosssills B B to permit the beam to oscillate freely, as is necessary, there is an unpleasant jar between the beam and the sills, which is communicated to the car-body whenever the truck is arrested in its movement along the rails by therapplication of the brakes, or by meeting obstructions on the rails. This I have arrested in the following manner: From the under side of the beam G, toward each end, projects a plate or dat standard, f, on either side of which a rubber spring, H, is-placed. A rod,g,passes through the spring. One end of this rod is inserted in the plate f and the other end, on which a screw is cut, passes through a hole or slot in a bracket, h, attached to the crosssill B or B', the hole in the bracket being larger than the rod g to permit asufcient play. A nut, t', on the rod g is turned up against the inner face of the bracket h to apply the required amount of pressure to the spring H, acap, m, on the rod bearing against the springs. The play of the rod g in the bracket h permits the desired oscillation of the beam C across the truck, while the springsH arrest and relieve the concussion of the beam against the vcrosssills, and by giving more space between the square ends of the springs H, bearing fagainst the flat standards f, also tend to cheek a too free swing of the bolster-beam laterally and The application ofsprings H, or their equivalents, on each side of the bolster-beam C, sub stantially in the manner and for the purpose ALFRED BRIDGES. Witnesses:

THos. R. ROAGH, P. E. TESCHEMACHER.

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