US133115A - Improvement in upholstery springs - Google Patents

Description

L. PATRIC.

1mprovement1n Upholstery Springs.

No. 133,115. Patented \N0v.19,1a72.

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UNITED STATES PATENT (DEELicE LEWIS PATRIC, OF SPRINGFIELD, OHIO.

IMPROVEMENT IN UPHOLSTERYASPRINGS.

Specification forming part ot' Letters Patent No. l33,15, dated November 19, 1872.

To all whom it may concer-n:

Be it known that I, LEWIS Parure, of Springtield, county of Clark, State of Ohio, have invented a new and useful Improvement in Upholstery Spring, of which the following is a full, clear, and exact description, reference being had to the accompanying dra-wing making part of this specication, in which- Figure 1 isa perspective view of a spring-bed composed of my improved springs, with a portion of the webbing or canvas broken away to show the spring Fig. 2 is a vertical longitudinal section; and Fig. 3 is a detached view of one of the springs, with the cap or block removed.

Similar letters `of reference denote corresponding parts in all the figures.

The object of the invention is to produce a spring equally well adapted for use in chairs, car-seats, lounges, and that class of work where a number of single springs, each with a single cap or block, are required, or for use in spring-beds with single caps, or with slats extending across the bed, either longitudinally or transversely, and also to make a spring which will permit a perfect freedom of movement in the cap or slat without any strain upon either portion of said spring or cap. To this end the iirst part of the invention consists in making the free end of the upper arm of coiled spring in the form of a hook, and then connecting said arm withv the cap, block, or slat by means of a staple inserted in the lower side of said cap, block, or slat in such manner that they may be tilted or rocked in either direction without bending the wire of which the spring is made. The second part of the invention consists in providing the free end of the lower arm of the spring with an angular pivot adapted to rest in a suitable seat cut for its reception in the spring support in such manner as to prevent the spring from swiveling, and thus retain it (the spring) always in a proper working position.

In the drawing', A A1 A2 represent the spring, in which A is the upper arm, A1 the coil, formed of any desired number of convolutions, and A2 the lower arm. The lower arm is provided with a right-angled shank, a al, adapted to rest in a gain or seat in the spring) in itsproper position. The end of the upper arm A is bent into a hook, a2, and by preference I arrange both shanks of the hook in a vertical plane at right angles to the vertical plane ofthe arm. B is the block or cap, usually made ot' wood, and provided centrally upon the under side with a staple, b, with which the hooka2 is made to engage when the parts are in proper working relation, as shown in Figs. l and 2.

In practice I usually cut a seat in the under side of the blocks to receive the head of the hook.

It will be observed in Fig. 2 that the horizontal portion al of the shank rests in the spring support, the vertical portion c being of such length as to keep the arm A2 entirely above said support, thus preventing any chat'- ing of parts.

, In the drawing I have shown my spring as.

applied to a spring-bed, the caps being held in their respective positions by mea-ns of a canvas; and it will be seen that they can be tilted in either direction without wrenching or twisting either the shank a a1 or the hook a2.

Slats may be substituted for the caps B, but the latter are regarded as being preferable, as they will yield in any direction, and will, therefore, conform more readily to the body of the person who occupies the bed.

I am aware that slots or seats have been cut in bed-slats for the reception of the upper arm of the springs, the end of said arm being formed into a hook and made to engage with the slat; but in all former constructions the slat was supported upon the lateral shank of the arm; hence the spring was not adapt-ed to be used in connection with caps which a-re required to tilt in all directions. But as my caps are supported upon the upper point or elbow of the 'hook they are entirely free to rock either way. I also regard the horizontal pivotshank ot the lower arm as being of great inlportance, as it effectually prevents the spring from being swung out of place, without interfering at all with its vertical vibrations, thus making each spring entirely independent ot' the others in this respect.

Having now described my invention,'what I claim as new, and desire to secure by Letters spring-support, and thus maintain it (the l Patent, is-

The hereindesoribed upholstery spring, con- Iu testimony whereof I have hereunto set sistingA of the arms A. A2, united by the conmy hand this 5th day of July, A. D. 1872. volutions A1, and. provided with the angular LEWIS PATRIC.

shank pivot al, in combination with the cap B, or a Slat supported upon the upper end of Witnesses:

the spring, substantially as and for the pur- A. P. LINN COCHRAN, pose set forth. T. J. PRINGLE.

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