USRE4679E - Improvement in back-chains for cart-saddles - Google Patents

Description

WILLIAM B. MCCLURE'.

Bck chains for Ncan saddles.,

No, 4,579, neissued 081519,1871..

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WILLIAM B. MCGLURE, OF ALEXANDRIA, VIRGINIA, ASSIGNOR OF TWO-THIRDS INTEREST TO JOHN C. GRAHAM AND H. O. OLAUGHTON.

IMPROVEMENT IN BACK-CHAINSFOR CART-SADDLES.

Specification forming part of Letters Patent No. 119,382, dated September 26, 1871 reissue No. 4,679, dated December To all whom it may concern:

Be it known that I, WILLIAM B. McGLURE, of Alexandria, in the county ot' Alexandria and State of Virginia, have invented a new and useful Improvement in Back-Chains for supporting the shafts of a cart or dray, the same being used in the groove of the cart-saddle 5' and I do hereby declare that the following is a full and exact description ofthe saine, reference being had to the accompanying drawing and to the .letters of reference marked thereon.

This invention consists in constructing a chain provided with friction-rollers in such manner that it is adapted for use as a back-chain for supporting the shafts of carts or drays, as will be fully described hereinafter.

In the drawing chains of different construction are represented, any of which may be adapted for use in the manner hereinafter described.

To enable others to put my invention into practhe use of carts, drays, or other two-wheeled vehicles a certain portion of the load necessarily rests directly upon the animals back, and as the position ofthe load relative to the animal varies constantly with the varying condition of the ground over which the cart is passing it is essential that means should be provided to permit the chain which supports the load to shift its position in harmony with the movements of the cart, in order that the animal may not be exposed to undue strain. For instance, Whenever the cart in moving passes over an elevation with one Wheel only, one shaft is correspondingly elevated but the other is entirelyT unaiiected. This result therefore follows, that unless the back chain slips in the groove the entire load resting upon the animals back is transferred to one side, and

it consequentlyT receives a violent wrench to one side or its back is exposed to a twisting strain.

By means of my invention this difficulty is entirely avoided. The back-chain freely slips in the groove of the saddle under all circumstances, and the load consequently always rests squarely upon the animals back. s

A, B, C, D, and E represent different forms of chains provided with rollers, any of which may be employed, as may be desired.

The form of chain is not absolutely essential, but some forms, ofcourse, are much preferred to others. y

One method of construction of my chain is as follows: Linksof ordinary construction, as shown in lFig. 2, are provided with friction-rollers, which are secured in place by means of a central pin, the links themselves being united by means of short links, as shown.

The other methods of construction are clearly represented in the drawing.

The style of chain represented in Figs. 2 and 5 are especially preferred because from their construction the links are permitted to swing laterally without injury to the chain-a result impossible with some ot' the forms shown.

. It is essential, however, that the chains should W. B. MGGLUEE.

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