USRE10289E - Car-truck - Google Patents

Description

E. B. M EATYARD.

GAR TRUCK.

No. 10,289; Reissued Feb. 20, 1883.

Fly. 2

UNITED STATES PATENT OFFICE.

EDWARD B. MEATYARD, on GENEVA, Wisconsin.

CAR-TRuc K.

SPECIFICATION forming part of Reissued Letters Patent No. 10,289, dated February 20, 1883.

Original No. 251,618, dated December 27, 1881. Application for reissue filed February 28, 188-2.

.10 alt whom it may concern Beit known that I, EDWARD B. MEATYARD, of Geneva. in the county of \Valworth and State of Wisconsin, have invented a new and described and claimed.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in both the figures.

Figure 1 is a sideelevation ot' the improved "truck. Fig. 2 shows a modification.

A A are the wheels; B B, the axle-boxes;

O, the bolster; D, the arched bar or upper chord. E is the inverted arched bar or lower chord of the truss, and F is the tie-bar. These parts are constructed as usual, except in the particulars hereinafter set forth.

In Fig. 1 the axle-boxes B are sloped or beveled on their upper sides to the angles of the arched bars, thereby forming a double slope one-ach axle-box, the apex being over the vertical center line of the axle, so that the bars D E meet on such line and directly above the cen ter oftheaxle; In Fig.2 the top of the axle-box is of the usual flat torm. With each form of axlebox the arched bar or-upper chord of the side beam'is aifixed to the box near its outer edge, while the lower chord is aifixed. at the inner edge. It will be seen that by this construction the weight on thetruss is transmitted to 'the vertical centerline of the axle, and isthus I equally distributed on the box, instead of the strain being localized at the inner edge of the box, where it tends to twist the box. This construction remedies a great defect in the ordinary iron truck-that is to say, the tendency to sag down. by the pressure, which the tie-bar is not snflicient to resist.

It is evident that a. beveled bearing-block on the axle-box will answer the purpose of givslopes being formed on the box proper, and, further, that the slopes may be dispensed with, as shown in Fig. 2. In either case the side bars are inflexible and solid.

Having thus fully described my invention, I c aim as new and desire to secure by Letters Patent- 1. In a. car-truck, a side beam composed of air-upper chord extending in a straightline from the bolster to the point of first attachtnent to the axle-box, said point being on the top of the box at the farther side, and a lower chord extending in a straight line from the bolster to the point of first attachment to the axle-box, said point being on the top of the axle-box at the nearer side, substantially as described, for-the purpose of balancing the tensile and compressive strains at a point verticall y above the axis of revolution.

2. In car-trucks,,side beams formed by trussbars united at their ends upon the axle-boxes at or near the center line of the boxes, sub sta'ntially as and for the purposes set forth.

3. The combination, in car-trucks, of arched side bars, I) E, and axle-boxesB, formed with their top portions sloped to the angles of the side bars, substantially as shown and described.

- 4. The double sloped or beveled axle-boxes B, combined with trussed side bars, D E, that unite at the apex of the slopes, substantially as shown and described. i

EDWARD B. MEAT-YARD. \Nitnesses:

Jno. G. MAcGREGoR, M. B. GAGE.

mg support to the truss end, in place. of the y

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