US570473A - Car-truck - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

J. H. GRAHAM. GAR TRUCK.

No. 570,473. Patehted Nov. 3,1896.

(No Model.) 2 Sheets-Sheet 2.

J.H.'GRAH AM. CAR TRUCK.

No. 570,473. Patented Nov. 3, 1896.

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' UNITED STATES PATENT FFICE,

JOHN H. GRAHAM, OF BOSTON, MASSACHUSETTS.

CAR-TRUCK.

SPECIFICATION forming part of Letters Patent No. 570,473, dated November 3, 1896.

Application filed November 22, 1895.

To all whom it may concern:

3e it known that I, J OHN I-I. GRAHAM, of Boston, in the county of Suffolk, State of Massachusetts, have invented certain new and useful Improvements in Gar-Trucks, of which the following is a description sufficiently full, clear, and exact to enable anyperson skilled in the art or science to which said invention appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a top plan View of the truckframe; Fig. 2, a side elevation of the same; Fig. 3, a vertical transverse section taken on line 00 a: in Fig. 2; Fig. 4, a like view taken 011 line y 3 in Fig. 2, and Fig. 5 a longitudie nal section through the axle-box.

Like letters and figures of reference indicate corresponding parts in the different figures of the drawings.

My invention relates especially to improvements in the construction of car-trucks for use with electrically-propelled street-cars; and it consists in certain novel features hereinafter fully set forth and claimed, the object being to produce a simple, cheap, and effective device of this character.

Thenature and operation of the improvement will be readily understood by all conversant with such matters from the following explanation In the drawings, A represents the frame of the truck considered as a whole. This comprises two metallic I-beams B, connected adj acent its ends by metallic tubing (1, through which a rod f passes, said rods being held by nuts g, turned thereon outside the beams. Centrally the beams are connected by a metallic rod h, on which is secured a plate 1 (See Fig. 1.) Between this plate and the beams tubes j are mounted on the rod 7L. Brace-rods 7c, bolted to the plate i, radiate therefrom and have their outer ends secured by bolts m to the beams. The pedestals G are bolted to the I-beams, one of the bolts on serving for this purpose. The axle-boxes D slide vertically between the pedestal-arms in. the usual way.

To the outer ends of the Ibean1s, clips l l are secured by bolts 9. These clips have a horizontally-inclined. eye (1 in their lower ends,

Serial No. 569,794. (No model.)

estals, one of which is broken away at the left of Fig. 2 to show said spring.

At either side of the pedestal a clip K is secured to the I-beani and is pendent therefrom. These clips have an opening 2, into which the ends of the semielliptical springs respectively project. Abolt 15, (seeFig. 3,) having an enlarged head 16, is dropped through the ends of the spring and bottom of the clip. On the lower ends of said bolts a base-plate 17 is held, between which and the clip bottom a coiled spring P is interposed, the strength of each sets of springs being less than that of the semielliptical spring. Two or three nested springs may be substituted for the single coiled spring.

The axle-box D (shown in Fig. 5) has a groove 25 on its top to receive the semielliptical spring, and in general construction is of the ordinary form. Around the axle E, however, I dispose a collar 26, flanged at 27 and convex at 28. On the box' I form an annular flange 29, and between said flange and the collar 28, I interpose a washer 30 of fibrous or other suitable material. This flange, when the parts are set up, throws against the corn vex face of the collar and is bent into the groove formed by the flange 27, serving as a dust-guard.

I11 the use of my improvement, the weight of the truck-fra1ne is received by the semielliptical springs w through the coiled springs p, which are hung, as described, from the ends in the manner described, also greatly strength IOO ens the frame Without adding materially to B, connected by tubes, at, and rods, f, 7!,(1116 its Weight. plate, 1', and the radiating braces, 71", eonneet- 15 The clips II K, supporting, respectively, ing said plate and beams. the tie-rods or arch-bars and pedestal-springs, 3. In a ear-truck the axle, in combination 5 afford aeheap, quick method of attaching the with the axle-box, D, having a flange, 29; same to the beams. collar, 26, provided with the convex portion,

Having thus explained my invention, What 28, and the flexible Washer, 30, in engagement 20 I claim is with said flange, substantially as described.

1. In a ear-truek, the I-beam, side bar in 10 combination with the tubular arch-bar and JOHN II. GRAHAM.

the clips, 11, bolted to said side bar and in Witnesses: which said arch-bar is secured. K. DURFEE,

2. The frame, A, comprising the I-beam.s, O. M. SHA\V.

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