USRE8057E - Improvement in locomotive-springs - Google Patents

Description

J. JENKINS. Locomotive-Spring.

No 8,057. v Reissued Jan. 29,1878.

WITNESSES IN VENTOR UNITED STATES PATENT OFFICE.

JAMES JENKINS, OF EVANSTON, WYOMING TERRITORY.

IMPROVEMENT IN LOCOMOTlVE-SPRINGS.

Specification forming part of Letters Patent No. 185,542, dated December 19, 1876; Reissue No. 8,057, dated January 29, 1878; application filed November 17,1877.

To all whom it may concern:

Be it known that I, Jams JENKINS, of Evanstou,-county of Uinta, Wyoming Territory, have invented a new andlmproved Locomotive-Spring, of which the following is a specification In the accompanying drawing, Figure 1 is a side elevation. Fig. 2 is a vertical section taken on line a: w in Fig. 1.

The invention relates to a spring composed of two independent parts, one being curved and the other nearly fiat or straight, and so placed and secured together that their ends, which lie in contact, have free movement on each other lengthwise but not laterally.

The invention further relates to inter-posing a supplementary spring between said parts, the same forming the median connection of the parts, as hereinafter described.

In the drawing, A indicates the upper part, and B the lower part, of the spring, the ends of the former, A, contacting with and resting upon the ends of the latter, 13, within the vertical slot of the hangers 0, whose function is to sustain the load and allow free independent movement of one part of the spring upon the other in the direction of the length of the "sprin g. The lower part Bis of semi-elliptical form, and composed of several leaves, which are held together and their lateral displacement prevented by the median clips D and side clips E, the latter being formed on the lower leaf of the spring. The'upper part A of the spring is nearly straight, and is shownin the drawing as composed of several leaves secured together by clips D E. A cylindrical or spiral spring, F, is placed between the two parts of the spring, the ends of the same bean ing against the median clips D. By this construction I produce a spring which has great elasticity, strength, and durability.

What I claim is 1. A locomotive drive-spring whose upper and lower parts have their ends in contact as shown, and freely and independently movable in guides or hangers, and provided with a median connection, substantially as shown and described.

2. A spring composed of the curved multiple-leaf portion B and the nearly-straight part A,'having their contacting ends extended in horizontal, or nearly horizontal, planes, so

JAMES JENKINS.

Witnesses:

WM.I-I. FRANCORN, ALF. G. LEE."

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