US987781A - Bed and seat spring. - Google Patents

Description

A. J. WELLMAN.

BED AND SEAT SPRING. APPLICATION FILED AUG.11, 1910.

987,781, Patented Mar. 28, 1 911.

WITNESSES INVENTOR.

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ALEXANDER J. WELLMAN, 0F CINCINNATI, OHIO, ASSIGNGR TO THE M. A. HUNT COMPANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIO.

BED AND SEAT SPRING.

To all whom it may concern:

Be it known that I, ALEXANDER J. ELL- MAN, a subject of the King of Great Britain, and a resident of Cincinnati, in the county of Hamilton and State of Ohio, have invented a certain new and useful Improvement in Bed and Seat Springs, of which the following is a specification.

This invention relates to coil-springs used more particularly in connection with bedbottoms and seat cushions, and it has for its object the better knotting or anchoring of the extreme end of the wire that forms the lower end coil of the sprin such better knotting or anchoring resulting in the circular contour of said end coil and preventing the slipping of the end of the wire on the coil or the spreading or the contraction of said end coil in use.

Another object of the invention herein is to provide a helical spring with an end coil that is practically or approximately fiat so that it properly contacts with the surfaceupon which it rests and there is no appreci' able rocking ofthe spring on said surface, such rocking of the spring as heretofore made resulting in the creeping movement of the spring from place to cause the bed or seat structure to become disarranged and defective when in use.

The novel features of the invention will be fully hereinafter described and particularly pointed out in the claim.

In the accompanying sheet of drawings, Figure 1 is a fragmentary perspective view of the lower portion of a helical bed spring or coil embodying my invention herein; Fig. 2, an elevation of the lower portion of a coil or bed-spring showing my invention herein as it appears on the surface of a supportingframe or the like; Fig. 3, aplan view of the spring seen in Fig. 2, showing the lower coil thereof only and the mode of attachment to an adjacent lower coil, together with the intervening coupling or fasteningclip; Fig. 4, an elevation similar to Fig. 2, but with the knot or anchoring end of the coil shown open ready for being interlocked or closed; Fig. 5, a detail plan view showing the form of clip used in connecting adjacent springs, such clip being ready for use but not folded over as it appears in position for coupling; and Fig. 6, a perspective view of the said clip in folded condition, as it ap- Specification of Letters Patent.

Application filed August 11, 1910.

Patented Mar. 28, 1911.

Serial No. 576,757.

pears when in use but not shown in connection with the springs.

1 indicates the lower coil of a spiral used for bed or seat purposes.

2 indicates the extended upper portion of the coil, shown in Figs. 2 and 4 of helix form.

3 indicates the extreme end of the wire forming the spring and located in the lower coil 1. This end 3 is bent inwardly at a right-angle to the coil 1 and is crimped so that it has an upward arch or bend l, then a downward bend 5, and then a final upward bend 6, the latter forming the extreme tip of the part 3. At the opposite end of the lower coil 1, adjacent or approaching the inwardly-bent end 3, the wire is bent inwardly and crimped so as to form two curved bends 7 and 8 therein and then the wire continues in coils of reduced diameters to form the helix.

In anchoring or looking the inwardly-bent end 3 the part .t of said end 3 engages the curved portion 7 of the second coil ligament and the portion 5 of said inwardly-bent end engages the next curve 8 of said second coil ligament, with the extreme end 6 engaging the said second coil at its beginning. Thus such a lock is formed that the lower coil 1 cannot spread either circularly or radially at such locked point and the latter is brought down close to the surface a upon which the spring is supported, as best seen in Fig. 2, so that said lower coil 1 practically or approxi mately lies in a horizontal plane and in almost full contact with said supporting surface, whereby all rocking of the spring on said lower coil is obviated. The manner of forming said bends or crimps in the lower coil and its ligament with the second coil is such as to preserve the said lower coil in a true circle and the lower end coils of all the springs in a structure are of uniform diameter for the better assembling thereof. The second coil is thus arranged at a suitable distance from the lower coil whereby no contact can take place between said lower coil and said second coil or any of the succeeding upper coils on the compression of the spring, and no sliding of the lower end of the wire can possibly take place on the second coil of the spring such as has heretofore been present in springs of this class and has caused considerable trouble in the use of such springs and their rcady breaking down on account of slipping from place, and the constant wear of such slipping or sliding causing such springs to soon break.

The interlocking of the inwardly-bent end of the lower coil is readily effected by bringing the arched portion J: to bear upon the upper side of the curve 8 and then letting the resiliency of the wire seat the extreme end 6 and the bends of the interlocking parts into place. The release of the locked end of the spring is just as readily effected by drawing or pressing on the second coil until its lower end escapes the end 6 of the inwardly-bent end of the lower coil.

The lower coils of adjacent springs in a bed or seat structure are preferably coupled together by means of a clip 9 that has ends 10 adapted to fold over as seen in Fig. 3, the body portion of the clip being adapted to fold over too, as best seen in Fig. 6. Any other form of coupling can be used but the spaced arms 10 are preferred as they permit the presence of the interlocked parts of the lower coil of one of the springs.

I. clai1n:

In a bed 01' seat spring, a lower coil of approximately circular outline having an inwardly-bent extreme end and an inwardlybent ligament at its opposite end the latterleading to the second coil, such inwardlybent extreme end having upper and lower bends in succession therein and said ligament having a pair of successive curves in opposite directions therein and said bends in said extreme end and in said ligament being adapted to engage each other for preserving the circularity of said lower coil, spacing the lower end of the second coil from said lower coil and bringing the said lower coil into close horizontal contact with the supporting surface.

ALEXANDER J. XVELLMAN. lVitnesses JOHN ELIAS Jones, LAURA E. SHIELDS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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