US90861A - Improvement in wagon-springs - Google Patents

Description

E. P. MCCARTHY.

Wagon and Car Spring.

Patented June I, 1869.

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EDMOND P. MCCARTHY, OF sAN FRANCISCO, CALIFORNIA, ASSIGNOR To HIMSELF AND JOHN GRANT.

Letters 'Patent No. 90,861, dated June 1,1869.

IMPROVEMENT IN WAGON-SPRINGS.

The Schedule referred to in these Letters Patent and. making part of the same.

To all whom it may concern Be it known that I, EDMOND P. MCCARTHY, of San Francisco, in the county of San Francisco, and State. of California, have invented certain new and useful Improvements in Wagon and Railroad-Gar Springs; and I do hereby declare that the following is a full and exact description of the same, reference being bad to the accompanying drawings, and to the letters of reference marked thereon.

with an elastic cushion and cups. struction will be fully described hereinafter.

In the centre of the lower cup is placed a cushion,

of India rubber, in the form of an ellipse, which is held by a bolt that passes through the cup-plates and spring, the head being countersunk in the cushion.

The upper cup is attached to the spring in the same manner, and both the ends of the cup-plates.

are clipped to the spring, so that the leaves are firmly bound together.

Referring to the drawings- Figure 1 is a sectional elevation of my device, showing the manner of attachment to the spring, the spring being shown in red.

Figure 2 is an elevation.

A and B are the upper and lower cups, which are made of metal, (I prefer to use brass, because it will not oxidize, yet any other metal might answer,) and provided with base-plates, D D. v

- An India-rubber, or elastic cushion is placed in the lower cup, where it is held firmly by a bolt, E, with a thread, which passes through the cushion, bottom of the cup, and'base-plate, and also through the spring, where it is held by a nut, so that by turning the cushion it can be tightened or loosened, and the end he made to fit the cup more closely.

The cushion, F, is in the form of an ellipse. I prefer this form to that of a sphere, principally on account of the distance that the spring has to descend before itis supportedat all by the cushion. It is true the two-thirds of the distance,-more or less, by the action of the screw in'the baseof the cup, after which the hole above may be filled up, to prevent the accumulation of dust.

The shape of the bolt-head, H, is such that it forms a double countersink above and below it in the cushion, and holds it in position in the cup when pressed down with weight, as well as when entirely relieved from'it. By this means, also, the cushion will be prevented from turning to either side of the spring, or doubling over when it receives the weight of the load, and the upper cup bears down upon the top of 'it.

Both ends of the upper and lower cup-plates-are clipped to the spring, firmly binding the-leaves together, and largely relieving the inner. leaves from vibration, so incident to elliptic springs, more especially in passing over rough places.

In attaching my device to cars, the same general formof cushion is employed, yet it would be necessary to use a much larger-sized spring, or cushion; and either the bolt and head already mentioned, or the plunger, or rod described in my former specification, will be required to keep the cushion in place.

Having thus described my invention,

, What I claim, and desire to secure byLetters Patent, is'

The bolt E, constructed with the head H, as described, so as to form a countersink above and below ifit iu the cushion, or spring, substantially as specied. In witness whereof, I have hereunto set my hand and seal.

EDMOND P. MCCARTHY. [L. s] Witnesses:

O. W. M. SMITH,

F. J. THIBAULT.

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