US148695A - Improvement in car-springs - Google Patents

Description

W. Pf HAN SELL.

CarfSprings.

Patented March 17,1874.

No.l48,695.

a Z. mW

Vmaintain the bearing-points always in their f Ulvrrnn STATES Arnnr @Prion WALTER P. HANSELL, OF PITTSBURG, PENNSYLVANIA.

IMPROVEMENT IN CAR-SPRINGS.

Specification ft rming part of Letfes Patent No. 148,695, dated March 17, 1874; applicaticn filed February 24, 1874.

To all whom it may concern:

Beit known that I, WALTER l?. HANsELL, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvement in Springs, of which the following is a specification:

My invention relates to springs adapted for railway-cars and other vehicles; and my said invention consists, iirst, of a leaf or elliptical spring, with four or more bearing-points, in pairs, of cross-plates, in which two of such bearing-points are employed to sustain the weight of the car and very light loads, while the other two cross-points of the same leaves are of less pitch in curve, and are held in reserve for action under medium loads,thereby making a double spring of each leaf fand iu'- creasing the capacity and strength of each leaf twofold while diminishing its length, second, in the combination of compound elliptical springs having four or more bearing-points to eachleaf, and each pair of bearin gs brought into action separately, with intermediate smaller elliptical springs, to sustain the weight of the load when the four bearing-points are brought into action under het vy burden, and preserve the elasticity of the cross-leaves upon their four bearing-points, third, in the combination of a compound elliptic or cross-spring with a central holding-rod formed with ns, to prevent the leaves from slipping' round and to proper relation for contact while allowing free vertical play to the springs; fourth, in providin g the top and bottom bolster-plates with hollow bosses, in combination with the central holding-rod for the springs, whereby the said rod is allowed vertical play within the bosses at both ends while being secured therein by rivet-heads.

In the accompanying drawings, Figure l represents an elevation ot' a spring embracing my invention, and as applied to the bolsters of a car; Fig. 2, a vertical section of the same; Fig. 3, a horizontal section, and Fig. 4, a view in perspective of one of the compound or crosselliptical springs.

The top and bottom plates A and B are secured to the bolsters G of the car in the usual manner, and between these plates the springs are arranged upon a central holding-rod, I).

These springs are composed of separate semielliptical plates,havin g each four or more leaves,

E, which, in the example shown, are at right angles to each other, andconstitute bearingpoints (t, .for action upon each other. These bearing-plates E are not of the saine pitch ot' curve, but two, a', of each separate leaf, are of less deflection or curve than the other two, c, in order that they may be brought into action under greaterl weight, thereby making each single leaf a double spring in itself, its four bearings being integral with the single leaf. The curves of these leaves will be such as to give them broad bearing-points, and they are secured so that such points will be in position for action upon each other whenthe spring is compressed. By this construction "the spring is mademuch shorter than the ordinary elliptic spring, while being much stronger, more durable, and' more elastic under weight. These four plates also hold the spring more firm, and prevent its displacement under sudden ooncussions. Interp osed between these springs are small elliptical springs, F, designed to be brought into action under heavy burdens, and to allow the four bearing-points to preserve much of their elasticity. The central rod D passes into hollow bosses Gr, Jformed upon the top and bottom plates A B of the bolsters, and the ends of the rod are rivetheaded, so as to hold it within these bosses and allow it free end play therein under the compression of the springs. It has iins or projections II, over which the springs tit to hold them from turning and to keep their acting points (a c always opposite and to match each other, the openings b in the springs correspondingfto the cross-section of said holding-rod.

Any suitable number of these springs may be used, and they may be composed of two or more thicknesses of leaves riveted together. Two of the bearing-points, a, of each leaf, meet and sustain the car and light loads, and under increase of weight the two others, a', are brought into action, and with heavy burden the four points meet upon the small interior springs F, and these still give spring to the car.

One of the chief advantages of my improved spring consists in constructing it of a series of bearing-points from a single short plate, and these points brought successively into action under different degrees of Weight, and occupying about halt the space of the ordinary elliptic spring. These springs are also made separate, and do not require to be secured together at the points, thus avoiding much expense usual in such springs.

I claim- 1. An elliptical 0r bow spring having four or more bearing-points, in pairs, with the two opposite bearing-points, a', of less pitch or curve than the others, a, substantiallyv as and for the purpose described.

2. In combination with elliptical or ,bow sprin gs having four or more bearing-points to be brought into action separately, theintemediate springs F, substantially as and'for the purpose described.

3. The combination of the springs, having four or more bearing-points, matching in pairs, with the central holding-rod D, constructed With ns H, to maintain the saidbearin g-points in proper position for action.

4. The hollow bosses G, in combination with the central holdingrod D, to give free play to said rod at both ends, as described.

WALTER P. HANSELL.

Witnesses XVM. J. LOGAN, BIDDLE R. HANsnLL.

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