US655738A - Car-spring. - Google Patents

Description

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' W. RGBMSON.

CAR SPRING. [Application filed Dec. $1, 10965 (mu model.)

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WllZLlAh/l ROBINSON, OF BQSTON, MASSACHUSETTS.

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$lPEt'iIFIdATION forming part of Letters Tat-lent lto, 655,738, dated A" gust 1d, 1900.

Application filed December 31, 1896. Serial No. 617.555 (No model.)

.Zo ctZZ whom it may concern:

Be it known that l, WILLIAM Roomson, a citizen or" the United States, residing at 1305- tor, in the county of Sudoll; and State oflilas sachusetts, have invented a new and Im-' proved Cantipring, of which the following is a specification.

The nature of my invention will be clearly understood from the description which follows, reference being had to the accompanying drawings, which form a partof his speci iication, in which-- Figure 1 is aside elevation, partly in vertical section, of a portion of a car-truck illustrating my invention partly developed. Fig. 2 is a detached isometric view of the intermediate springsupporting cup. Fig. 3 is a top View, partly in section, of my improvedspring so far as illustrated in Fig. 1. Fig. 4 shows the spring fully developed, and Fig. 5 shows Elie i1 ullydevelopedsprin g as applied to a carrue r.

A represents a portion of a car-truck consisting, mainly, of the frame 13; the wheel 0, with its journal-box D, adjustably secured to the frame B; the pedestal E,.keeping the box D in proper alinement with reference to the frame B, and my improved springs F.

The journal-box D is provided with the spring-supporting wings a, and these wings are provided with the spring cups or receptacles b. The exterior spring 0 rests upon the bottom I) of the cup Z1 and is supported thereby. The intermediate spring-cup G has its top provided with the annular flange e, extending outwardly, and its bottom with the annular flange f, extending inwardly. The saidcup G is dropped down inside of the spring c, extending approximately to the bottom of said spring, the flange e of said cup resting on topof said spring a, as shown. The spring (Z, of less diameter thanthe spring a, is placed within the intermediate cup G and rests on the bottom flange f thereof, while the truck-frame B rests on top of the spring (Z, as shown. One of said springs 0 cl is preferably stiffer and offers more resistance to compression than the other, the outer spring usually being the st'ifier of the two.

The operation is as follows: The load (represented by the frame B) rests directly on the lighter springs d, compressing these springs materially and giving an easy resilient support to a light load, the heavier springs c, which directlysnpport the springs d and their load, being somewhat compressed. As the load is increased com mensurately with the repression of the spring (Z under a given load will be just twice as great as the compression of the spring 0. To illustrate, if we assume that the distance between the spring-bearing g of the frame B and the top of the flange e of the cup G is one inch then a load compress ing the spring (1 one inch will at the same time compress the spring 0 half an inch, from which it is evident that the'frame B will have to travel downward one and one-half inches before striking the top of the flange e of the intermediate cup G'. 7

It is evident that evenif the inner and outer springs be made of the same relative resistance, yettho aggregate length of the two springs together will give inuchgreater resiliency and ease of riding than a spring the length of onlyone of them could possi bly give.

In Fig. 4 the spring dis provided with the spring cap or bearing g and the spring 0, with the base-cap or inverted cup 71, which forms a bearing for the outer spring a and the check-spring k, as shown. The springpost 2', having its head a" countersunk in the cap g, passes centrally through all the springs. The spring-post'i is provided at its lower end with the washer Z, supporting the spring k, and with the adjusting-nuts m below said washer. Thus it will be seen that by means of the adjusting-nuts 172 any desired initial compression-may be imparted to the springs c d and also to the check-spring k. Further-v more, in practice the checkspring 7r prevents the sudden and extreme rebound of the.

springs o and d and allows only an easy and limited rebound of said springs, thus. provonting in a great measure the teetering or a stance trnding through the orifice n in the bottom of the spring-cups b of the box. 7

The arrangementof springs shown in Fig. 5 is precisely the same as that shown in Fig. 4, except that the upper end of the springpost i is secured to the frame B and the upper end of the check-spring k abuts directly against the bottom I) of the spring-cup b of the journal-box.

in many car-trucks, especially for electric cars, it is often very'diflicnlt to find room for a satisfactory arrangement of springs to insure easy riding under varying conditions of load. It will be observed, therefore, that one important advantage of my springs is the little space which they occupy while securing all the varying ad vantages of light and heavy springs combined.

I have shown my springs as supported directly by the journal-boxes; but it is evident that they may be used in any position in which car-springs are usually placed or wherever these springs may be found useful or suitable without departing from the spirit of my invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a cal-spring, the combination, substantially as described, of an outer spring, a second spring extending within said outer spring, a spring-cup extending between said springs, said spring-cup having oneend super ported by one of said'springs and its opposite end, in turn, supporting the other spring,

caps or bearings on the respective'free ends of saidsprings, a tension or checl: spring on the opposite side of one of said caps or bearings, an adj usting 'od passing through all of said springs and means'for adjusting the tension of said springs.

2. In combination,- substantially as detending within said spring a, the intermediscribed, the outer spring 0, the spring cl ex-". 1

ate spring-cup G located within the spring 0 and outside of the spring d, said spring-cup resting on one of said springs and supporting the other, each of said springs supporting the load imposed on the free or extreme end of either,caps or bearings g, h on the. free ends of said springs the tension or check e adjusting-rod i passing through all of spring 7.: on the opposite side of the bearing the springs, and the adj usting-nut m on the endof the rod iand adapted to impart 'initial- 7 tension to said springs.

3. In combination with the trnck-frame and the axle-gear, an outer spring supported by the axle-gear, an intermediate spring-cup supported by said spring and extending down inside of the same, an inner spring passing down within said spring-cup and supported on the bottom thereof, the truck-frame resting on top of said inner spring, a post or red connected to said truck-frame and passing down through said springs and axle-gear, a tension or check spring surrounding the lower end of said rod and abutting against a plate or bearing of said axle-gear, and a not or device on the lower end of said rod adapted to adj nst the tension of said springs, substantially as described.

WILLIAM BINSON.

\Vitnesses:

H. '1. Convert, C. F. A. SMITH.

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