US2395402A - Spring construction - Google Patents

Description

Feb. 26, 1946. r L c, SHER 2,395,402

SPRING CONSTRUCTION Filed June 16, 1941 I 2 Sheets-Sheet 1 INVENTOR 19174;? C Hair:-

, ATTORN 5.

Feb. 26, 1946. c. FISHER SPRING CONSTRUCTION 2 Sheets-Sheet 2 Filed June 16, 1941 INVENTOR fylrfay C? 725Zerr ATTORN 5 Patented Feb. 26, 1946,

UNITED STATES PATENT OFFICE SPRING CONSTRUCTION Lyman C. Fisher, Detroit, Mich., assignor to The Murray Corporation of America, Detroit, Mich., a corporation of Delaware Application June 16, 1941, Serial No. 398,177

9 Claims.

rings which are clamped about the springs and v the border wire when in abutting relation or which are secured by safety pin types of clips when the springs are disposed in spaced relation.

In practicing my present invention, I elimihate the use of the hog rings and pins by forming a wire strip into zig-zag formation and dispose the convolutions of the strip over the wire forming the spring and in some instances over the border wire. It may be advisable in most instances to secure the marginalsprings to the border wire by the hog rings to more securely anchor the border springs to the wire and to interconnect the intermediate springs relative to each other by the sinuous spring strip. The strip not only retains the springs in position, but provides a continuous top surface while retaining the resiliency of the spring, which may assume a predetermined desirable contour when loaded.

The convolutions are preferably crimped closer together at the open edges so as to snap over the wire of the springs and the frame and to be locked in position. The strips may bedisposed parallel to the edges of the frame or at an angle thereto and interlocked relative to' each other at the points of intersection and may be sinuously disposed between the rows of springs.

The strips may be continuous so as to extend from one to the other side of the frame or may be cut into small lengths and the lengths employed to span the space between the adjacent springs. The strip may also be employed between rows of springs which are disposed in pockets made of fabric material such as burlap, cotton cloth and the like and may be hog ringed to the adjacent pocketed springs for maintaining the springs in lateral position relative to each other. The open convolutions of the strip may be partially or entirely closed and may be made of round or flat stock. While I have mentioned the strip as being employed on springs, such as coil springs and those of the zig-zag type, it is to be understood that the strip is useful for resiliently spacing other elements relative to each other.

Accordingly, the' main objects of my invention are: to provide a sinuous strip made of wire bent in zig-zag form and employed as a spacing means for elements; to space a plurality of springs relative to a frame by using a strip formed of wire bent in zig-zag formation, the convolutions of which are forced over the wire of the springs and/or frame; to form a strip, for spacing springs and objects relative to each other, from wire bent in zig-zag formation with the normally open convolution partially or wholly closed to provide resistance against removal; to form a strip of sinuous shape from wire which may be round or rectangular in cross section for the purpose of spacing elements relative to each other; and, in general, to provide a sinuous spring strip which retains elements relative to each other, which is simple in construction and economical of manufacture.

Other objects and features of novelty of my invention will be either specifically pointed out or will become apparent when referring, for a better understanding of my invention, to the following description taken in conjunction wit the accompanying drawings, wherein:

Figure 1 is a broken plan view of a spring cushion employing a pair of spaced sinuous strips embodying features of my invention;

Fig. 2 is an enlarged broken view of a spring construction showing one method of use of my spacing strip;

Fig. 3 is a view of structure, similar to that illustrated in Fig. 2, showing a further manner in which the spacing strip may be employed;

Fig. 4 is a view of structure, similar to that illustrated in Fig. 2, showing a still further manner in which the spacing strip may be utilized;

Fig. 5 is a viewof structure, similar to that illustrated in Fig. 4. with the spacing strips shown as individual elements;

Fig. 6 is a view of structure, similar to that illustrated in Fig. 2, showing a still further use of my spacing strip;

Fig. '7 is an enlarged sectional view of the structure illustrated in Fig. 1, taken on the line thereof;

Fig. 8 is a viewof structure, similar to that illustrated in Fig. '7, showing a modified form of my invention; and e Fig. 9 is a view of structure, similar to that illustrated in Fig. 8, showing a still further form which my invention may assume.

In Fig. 1, I have illustrated a seat cushion I0 having a frame I I of conventional form across which sinuous spring strips l2 are bridged. The sinuous spring strips are similar to-those of the Karl Kaden Reissue Patent No. 21 ,263, issued November 12, 1939, under which the present assignee tions.

I 5,the open space between which is partially closed to lock the strip IS in position. The strip may be so formed as to have the spaces between the convolutions entirely closed as illustrated on the strip l6 of Fig. 8. In Fig. 9 I have illustrated a strip I! which is made of fiat stock being rectangular in cross section and providing a greater resistance against the opening of the abutted convolu- The employment of the strip eliminates the necessity of hog ringing the individual springs together when abutted, or when spaced, securing the springs by the safety pin type of clip. It is only necessary to snap the spacing strip l3 over the spring strips l2 to complete the assembly of springs. The strips not only maintain the spring elements spaced relative to each other, but permit them to be freely deflected when loaded.

Fig. 2 illustrates the strips I3 (I6 or IT) when applied to the top coils of a coil spring unit. The strips l3 are disposed parallel to the edges of the frame and cross each other on the axis of the coils so as to be firmly locked on the coils l8 and to each other. The ends of the strips extend over a border wire 2| and provide the locking means for securing the border wire to the top coil of the springs.

In Fig. 3, I have illustrated the border coil springs It as being secured to the border wire 2! by hog rings 22 in the conventional manner with the springs I8 spaced apart and secured in resilient relation to each other by the sinuous strips l3 (16 or H) which are serpentinely disposed across alternately disposed springs and which cross each other on a medial line between the rows of springs.

In Fig. 4, I have illustrated the strips l3 (I6 or H) as being diagonally disposed relative to the border wire 2| to which the spaced border coil springs [8 are secured by hog rings 22. The diagonally disposed strips intersect each other in the center of the springs and also on lines disposed between the rows of springs. A greater number of the strips l3 are employed in this construction than in that shown in Fig. 2 which closes the gaps between the springs and provides increased support for the trim padding.

In Fig. 5, I have illustrated a spring assembly similar to that of Fig. 4 with the exception that short pieces of the strip l3, such as that in Fig. 8, are used for joining the springs together. The strips have the end convolution anchored to the coil springs I 8 and are joined to each other at the point of intersection between four of the springs. Material saving in the amount of the strip employed, results from the use of theshort pieces over that when long lengths 9f, the strip are utilized. I

, In Fig. 6, I have illustrated an assembly of coil springs l8. disposed in rows of pockets 23 which are extended across the seat structure. The border wire 2| is secured to the top convolution of the marginal coil spring by the hog rings 22. Between the longitudinally extending rows of coil springs the strips I3 (l6 and l1) are disposed and are secured to the adjacent springs l8 and I to the pocket material by hog rings 22. The strips l3 in this manner act as resilient spacers for positioning the coils of the rows relative to each other while maintainingfiexibility.

What I claim is:

1. In upholstery spring construction, a support comprising a plurality of longitudinally elastic springs formed of strip material having zig-zag shape, a continuous tie member intersecting and spacing said springs and fixedly secured at each such intersection thereto, said tie member comprising a wire stri having successive oppositely opening loops, all of which are substantially in the same plane, the plane of said tie being substantially, normal to' the plane of said springs, said springs being received within said loops at said intersections between said springs and said tie, said loops in said tie which receive said springs opening in one direction.

2. In upholstery spring construction, a support comprising a plurality of longitudinally elastic springs formed of strip material having zig-zag shape, a continuous tie member linearly intersecting said spring and fixedly secured thereto at each such intersection, said tie member comprising a wire strip having successive oppositely opening loops which are substantially in the same plane, said loops being so spaced that a number of said loops lie between successive points of intersection of said tie with said springs, at which points said springs are received within loops adjacent thereto, the plane of said tie being substantially normal to the plane of said springs, and said loops receiving said springs opening in one direction. I

3. In a spring construction, a plurality of coil springs, means on which said springs are supported, a plurality of strips formed of wire bent in zigzag formation, said strips being disposed in a plane parallel to the axes of the coil springs and disposed over the top coils of said springs, said coils extending into the open convolutions of the strips for spacing the springs relative to each other.

4. In a spring construction, a plurality of coil springs, means on which said springs are supported, a plurality of strips formed of wire bent in zigzag formation, said strips being disposed in a plane parallel to the axes of the coil springs and disposed over the top coils of said springs, said coils extending into the open convolutions oi the strips for spacing the springs relative to each other, and a border wire extending around the marginal springs and retained in position relative thereto by the endmost convolutions of the strips.

5. In a spring assembly, a plurality of coil springs, means on which said springs are supported, sinuous spring strips made of wire bent ported, strips of wire bent in zigzag formation to provide convolutions disposed parallel tothe axes of said coil springs and certain of the; spaces between the convolutions of the strips receiving the top coils of the springs to resiliently space them relative to eachother, said spaces b illfiof-less of coil I springs, means on which said springs are supwidth than the diameter of the wire of said top coil.

7. In a spring construction, a plurality of springs, means on which said springs are supported, short strips or wire bent in zigzag formation having the open convolutions oi less width than the wire of the springs, said strips having certain of their open convolutlons snapped over the wire of the springs and said strips spacing the springs relative to each other, the strips being disposed in crossed relation to provide a resilient support between the springs.

8. In a spring construction, a. plurality of spring elements made 01 wire, means for supporting said elements, a strip of wire bent in zigzag formation to provide spaced convolutions having restricted elements, means on which said elements are supported, strips of wire bent in zig-zag formation having the open convolutions of less width than the wire of the spring elements, said strips being disposed in a plane parallel to the axes of said springs and snapped downwardly over the spring elements for positioning the spring elements relative to each other.

LYMAN C. FISHER.

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