US506546A - Vehicle spbim - Google Patents

Description

UNITED STATES PATENT OFFICE.

MALCOLM E. ROBB, OF KNOWLTON, CANADA.

VEHICLE-SPRING.

SPECIFICATION forming part of Letters Patent No. 506,546, dated October 10,1893.

Application filed April 1, 1893. Serial No. 46 8,713. (No model.)

To all whom it may concern:

Be it known that I, MALCOLM ELWIN RoEB, a subject of the Queen of Great Britain, residing at Knowlton, in the county of Brome, Province of Quebec, Canada, have invented certain new and useful Improvements in Vehicle-Springs; of which the following is a specification, reference being had therein to the accompanying drawings, in which- Figure l is a vertical longitudinal section of the front rocker and axle and the connecting spring of a vehicle; Fig. 2 afront view of the rear axle; Fig. 3 adetail view of one of the bearing boxes for the oscillating arms; Fig. 4 a detail perspective of one of the oscillating arms; and Figs. 5 and 6 detail views of the coupling at the forward ends of the Y springs.

The object of this invention is essentially to provide improved means for attaching the ends of the side-springs ot' a vehicle to the rocker and rear axle in such a manner that the cramping or buckling strain to which the ordinarily constructed springs are subjected to will be entirely obviated as more fully hereinafter set forth. Y

In the drawings, @designates the rocker, a the rear axle and b one of the side-springs connecting the rocker and axle. The ends of the springs have attached to them bearing plates b', each of these plates being pivotally supported, by a horizontal bolt, between the upwardly-extending arms of a couplingbracket, c, which is clamped down securely on the rocker by an ordinary clip c', which also passes between said arms. These brackets c have each a sharpened rib c on its under- Side which extends longitudinally of the rocker and enters the wooden part thereof. The object of .this connection is to provide means for securing the front ends of the spring to the rocker more rigidly than the devices now in use.

It will be observed that the rib c extends nearly the full length of the coupling-bracket and is in substantially the form of a segment, whereby the rib not only greatly strengthens the bracket-coupling but also prevents its slipping or twisting on the rocker.

The blocks b on the rear ends of the springs are each`pivotally secured, by a horizontal bolt, between the upper ends of a pair of vertical side-bars d composing the curved supporting arms d, these arms being pivotally clamped to the underside of the rear axle and curved upwardly andslightly backwardly so` as to terminate directly over the axle, as shown. Each of the two oscillating arms or brackets d is composed of the vertical side-bars d and the connecting cross-bars d, the lower cross-bar being rounded to serve as the pivotal-bar. The pivotal bars are supported in bearing-grooves formed in the upper sides of the hanged bearing-blocks e, which are clamped to the underside of the axle by clips c of the ordinary construction, the curved arms being thereby securely connected to the axle.

In use, it will be observed that the curved arms will freely oscillate or swing in unison with the endwise movements of the springs and thereby relieve the same of all crushing or buckling strain.

If it is desired that the two arms oscillate in unison, they may be connected together by a rod f, as shown in Fig. 2, which connection will partly equalize the strain should one of the springs be depressed more than the other. The pivotal bar f connecting the vertical curved arms may be extended on each side of the arms, and clamped there by two bearing blocks, instead of by one between the arms-the same flanged bearing block being used-as shown in dotted lines in Fig. 2.

I am aware of the Throop and Doyle patent of June l2, 1877, No. 192,033, and I do not claim anything therein shown and described. In this patent the two side-springs are each supported on the upper ends of a single curved arm, said arms being formed by bending up the ends of arock-shaft mounted under the axle and extending nearly the full length thereof, said arms coming outside the bearings supporting the rock-shaft. This construction necessarily brings the weight of the load outside the bearings and thereby unevenly wears the same and causes side motion; this construction also renders it necessary that the two curved arms be connected by an unnecessarily heavy rockshaft,whereas IOO my invention involves the use of two independent supports, each of which is cast of a pair of rigidly-connected curved-arms, the two supports being connected bya light rookshaft or rod or not as desired. The eXtreme lower ends of the arms of each support are integrally connected by a rounded bearingbar, which serves as the pivot, and about midway their length they are connected by another integral bar, the whole forming a light rigidframe and broad bearing, which will throw the weight of theload directly and evenly on the bearing-clip and prevent uneven Wearing and side motion. The construction covered by Throop and Doyle necessitates the employment of 'a rook-shaft, and this shaft must be, in order to properly snpport the load, too large to admit of being attached to the bottom of the light axles now employed in light vehicles.

Having thus fully described my invention, what I claim iss-- The combination of an axle, two supports d carried by the axle, one near each end, each 0f said supports consisting of a pair of curved side bars d d', curving from below the axle up above the same and rigidly connected at a point about midway between their ends by a bar CZ", means for connecting and pivoting the lower ends of the supports to the axle, and springs having their ends pivotally secured between the upper ends of the side bars d' d', substantially as described.

In testimony whereof IafflX my signature in presence of two witnesses.

MALCOLM E. RoBB.

Witnesses:

D. M. RAY, J. P. SHUFELT.

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