US668334A - Spring seat or bottom. - Google Patents

Description

Patented Feb. I9, I91. 0. S. MARSHALL & F. E. DAVIS.

SPRING SEAT OB BOTTOM.

(Application filed Oct. 12 1900.) (No Model.)

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NrrED STATES ATENT FFlCE.

CLINTON S. MARSHALL AND FRANK E. DAVIS, OF WORCESTER, MASSACHU- SETTS; SAID MARSHALL ASSIGNOR TO THE AMERICAN STEEL AND \VIRE COMPANY OF NEW JERSEY, OF NEW JERSEY.

SPRING SEAT OR BOTTOM.

SPECIFICATION forming part of Letters Patent N 0. 668,334, dated February 19, 1901.

Application filed October 12, 1900. Serial No. 32,862. (No model-l To all whom, it may concern.-

Be it known that we, CLINTON S. MARSHALL and FRANK E. DAVIS, citizens of the United States, and residents of Worcester, county of Worcester, and State of Massachusetts, have invented certain new and useful Improvements in Spring Seats or Bottoms; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to that type of springbottoms for beds, sofas, seats, and the like which comprises a series of helically-wound springs that are secured to a supportingframework consisting of wires stretched across between the side pieces of the main structure. In this class of bottoms the springs are set with their large ends uppermost, and

the coils or convolutions at their smaller ends are utilized to secure the springs to the supportingwires. This is often a difficult matter, owing to the fact that the lower-endcoils are of very small diameter compared with the height of the springs and the size of the coils at their upper ends, on which the mattress or stuffing rests; and the particular object of the present invention is to secure these springs on their supporting-wires, so that they shall 0 be locked firmly thereto and held erect and prevented from tipping overor being deflected laterally when the weight of the person is thrown upon them.

The invention is illustrated in the accompanying drawings, wherein- Figure l is a plan view of a chair-seat frame; and Fig. 2, a cross-section, the springs being shown in elevation.

Referring to the views, a denotes the frame of the seat. It may be of any preferred size and shape and be made of any suitable material. Extending across the center of this frame are the wires b,which form the supports for the springs 0. These wires are secured at 4.5 their opposite ends to the side pieces of the seat frame in any preferred manner. As herein shown, their outer ends are bent downwardly and driven into the side pieces; but the invention is not limited to this or any particular means of fastening them.

The springs c are of the usual helical type and are arranged with their large ends uppermost, so as to aiford the greatest amount of supporting-surface.

The supporting-wires b are preferably depressed below the uppersurface of the frame sides a, as best shown in Fig. 2,though we do not regard this as at all essential. At those points along their length where the springs are to be located these wires are formed with pairs of upwardly-extending loops (1 d, and between the loops of each pair the wires are bent downwardly again preferably, though not necessarily, to a point below the level of the main length of the wire, as indicated at e in Fig. 2. The number of these pairs of loops will of course depend on the number of springs on each wire, and the size of the loops or the distance apart of the individuals composing each pair will be determined by the size of the wire employed and the diameter of the end coils of the springs. The height to which the loops extend upwardly is a matter of no particular consequence, provided they project sufliciently to pass through the lower convolutions or coils of the springs and permit of the flaring of their upper ends, which latter is one of the important features of the improvement.

As illustrated in Fig. 2, the springs are set down over the loops with their small ends lowermost. The distance apart of the individual loops composing the pairs is accurately proportioned to the size of the springs, so that they shall be closely encircled by the lowermost coils. The springs are thus supported by that portion of the wires outside the loops, and the depressed bend 6, between the loops, extends sufficiently below the lower end of the spring to permit a cross-wire fto 0 be passed at right angles to the supportingwires and threaded through the opening be-' tween lowermost coil and the upper surface of the wires.

It will be noted from Fig. 2 that the crosswires f are thus located on a level with the main length of the supporting-wires I). They therefore afford additional points of support for the springs at diametrically opposite points on the circle described by the lowermost coils. It is not intended, however, that the wires f should perform any office in holding the springs down on the supportingwi res, this result being obtained in the present arrangement by the flaring of the loops d d, as will be apparent on inspectiou of Fig. 2.

The construction being as thus described, it will be noted that there are four points of support for each springtwo on the supporting-wires b and two others on the cross-Wires f. This arrangement gives the broadest possible base to the springs and serves to prevent them from tipping. The springs are also braced and steadied against lateral deflection by the flaring loops that fit snugly in the bottom coils and also serve to prevent the springs from being lifted off the supporting-wires. I

Having thus described our invention, what we claim is- 1. In a spring-seat, the combination of a helical spring, asupporting-wire passed transversely across the lower end of the spring and formed into a pair of loops projecting upwardly through and closely encircled by the lower convolution to brace and steady the spring, and a cross-wire passing between the loops of the supportingnvire and below the lower convolution of the spring.

2. In a spring-seat, the combination of a helical spring, a supporting-wire passed transversely across the lower end' of the spring and formed into a pair of flaring loops projecting upwardly into the spring and closely encircled by the lower convolution thereof to brace and steady the spring; and a cross-wire passed at rightangles to the supporting-wire between its loops and between its upper surface and the lower convolution of the spring.

In testimony whereof we affix our signatures in presence of two witnesses.

CLINTON S. MARSHALL; FRANK E. DAVIS.

Witnesses: v

GHAs. B. SANFORD, J. NELsoN CHAMPLIN.

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