US517688A

US517688A - Island

Info

Publication number: US517688A
Authority: US
Publication date: 1894-04-03
Anticipated expiration: 1911-04-03

Description

(No Model.)

B. G. GIBSON;

GAR TRUCK.

Patented Apr. 3, 1894.

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Ni'rn "STATES PATENT Erica.

EVERETT G. GIBSON, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR OF ONE- HALF TOEDGAR G. DURFEE, SAME PLACE.

- CAR-TRUCK.

SPECIFICATION forming part of Letters Patent No. 517,688, dated April 3, 189d.

Application filed November 20, 1893. Serial No. 491,446. (No model.) i

To all whom it may concern.-

. Be it known that I, EVERETT G. GIBSON, of Providence,in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Oar-Trucks; and I hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification.

This invention has reference to improvements in car-trucks in which springs are used to support the car-body.

One oject of the invention is to reduce the wear on the spring.

Another object is to so construct the bearings, which are supported by the spring, that while the ends of the spring are free to move I thereon the grating of sliding parts is avoided and the wear on the bearings reduced.

The invention consists in the combination furnished with bearing-bolts surrounded with sleeves adapted to be received in the concavities of the spring and to rotate on. the bolts as the spring bends.

The invention also consists in such other peculiar features of construction and combination of parts as may hereinafter be more fully described and pointed out in the claims.

Figure 1 represents a side view of portions ofa car-body and its truck showing the improved spring and bearing, parts of the same being broken away. Fig. 2 represents a vertical sectional View of the same taken through the bearing-sleeve and one end of the spring.

Similar numbers of' reference designate corresponding parts throughout.

Bearings for the ends of springs in cartrucks have heretofore been formed by bolts movable in longitudinal-slots in brackets depending from the car-body, the ends of the springs being secured to the bolts the movementof which, in the slots, allowed sufficient play for the operation of the spring,-the constant movement of the bolts in the slots pro- In carrying my invention into practice my aim has been to dispense with sliding bearings for the ends of the spring to increase the surface of contact between the spring and the bearing and at the same time to allow the ends of the spring free play for the action of the spring.

In the drawings 5 indicates the upper sideframe of a car-truck, and 6 is a spring secured to the upper surface of the side-frame by the box 7. The spring is formed from a series'of leaves of graduated lengths, the two upper leaves 6'-6 being longer than the lower leaves and having transverse concavities in their upper surfaces formed by bending the near the ends of the bearing-plate, and se-- cured through perforations'in each pair of bracket-plates is a transverse-bolt 11 carrying a rotatable sleeve 12 adapted to be received in the concave portion .at the end of the leaves 6' of the spring.

The diameter of the sleeve 12 being considerably greater than that of the bolt, or pin, in the old method presents a much better bearing to the end of the spring, considerably reducing the wear on the same, while the rotation of the sleeve on the bolt allows free play to the action of the'spring.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. In a car-truck, the combination with the side-frame, and a curved spring secured thereto and having transverse concavities in its upper end-portions, of a bearing-plate having depending bracket-plates, a shaft fixed in said bracket-plates, sleeves rotatably mounted onsaid shaft between said bracket-plates and the sleeves l2-12 loosely mounted on 10 said bolts, as and for the purpose described.

In witness whereof I have hereunto set my hand.

EVERETT G. GIBSON.

Witnesses:

JOSEPH A. MILLER, J r., a M. F. BLIGH.