US2248023A - Bedspring - Google Patents

Description

y 1941- E. s. GOLDBERG 2,248,023

BEDSPRING Fi led Dec. I 14, 19:58

fiweraion EDWARD S. GOLDBERG Patented July 1, 1941 BEDSPRING Edward S. Goldberg, Philadelphia, Pa., assignor to Bunting Glider Company, Philadelphia, Pa., a corporation of Pennsylvania Application December 14, 1938, Serial No. 245,574

1 Claim.

This invention relates to an improved coil spring structure for use in bed springs, glider springs and the like, one of the principal objects being to provide novel means for maintaining the individual coil spring in proper relation to each other at all times.

It is a further object of the invention to provide in superimposed relation to the upper ends of the coil spring a series of coil spring positioning strips relation whereby to provide an auxiliary supporting face for the mattress, the said intersecting bands being interconnected by plates or discs respectively located centrally within the upper convolutions of each coil springin such manner that said plates or discs prevent spot bulging of the mattress downwardly into the coil spring, thereby increasing the life and wear of the mattress.

It is a further object of this invention to maintain the transverse and longitudinal coil positioning bands or strips at right angles to each other at each coil by the use of the plates or discs aforesaid, while permitting motion of each strip in the direction of its own length, thereby preventing interference with the normal action of the spring as a whole.

It will be understood that the invention consists substantially in the combination, construction, location and relative arrangement of parts, all as described more fully hereinafter, as shown in the accompanying drawing, and as finally pointed out in the appended claims.

In the accompanying drawing which illustrates a preferred embodiment of the invention:

Figure l is a plan view of a coil bed spring constructed in accordance with and embodying the principles of my invention;

Figure 2 is a plan view of a section of the coil spring of Figure 1, showing the construction in greater detail;

Figure 3 is a cross-sectional view taken on the line 3-3 of Figure 2;

Figure 4 is a perspective view showing the strip holding device in detail; and

Figure 5 is a section on line 5-5 of Figure 4.

Referring to the drawing, [0 represents a substantially heavy rectangular bottom frame and II represents transverse equally spaced apart parallel bars fastened to and extending between two parallel sides of the rectangular frame member l0. W'ires l2, which are likewise equally spaced apart in parallel relation are fastened to and extend between the other two parallel sides of the frame member Ill. Thus, the sets of or bands arranged in intersecting.

parallel bars H and wires [2 cross each other,

it being observed that the wires l2 are bent at intermediate points, as at I3, to receive the bars ll. At each of the intersections vertical coil springs l2 are supported in the usual manner and arranged in rows that extend transversely and longitudinally of the supporting frame; The upper convolutions l5 of the springs l4 may be connected together by small diagonal helical springs IE or in any other suitable way. The

upper heavy rectangular frame is shown at H and the outside rows of coil springs l4 adjacent thereto are fastened to the frame IT in the usual manner by wire clips It .or in any other way.

Also provided above the coil springs l4 are a plurality of longitudinally extending thin metal bands or strips l9 and extending transversely with respect to these strips or bands are a plurality of similar strips or bands 20. It will be noted that the groups of strips l9 and 20 are each arranged in parallel sets, crossing each other at points respectively above the coil springs Hi, the strips 20 being below the strips l9, but this relation may be reversed if desired. The strips l9 each pass above the uppermost convolution l5 of the coil springs l4, while the strips 20 pass beneath the same uppermost convolution. The ends of the strips l9 and 20 are joined to the outermost rows of coil springs M by means of light helical springs 2| or in any other suitable manner. In the normal use of the entire spring structure, the coil springs l4 flex vertically and in doing so cause the strips l9 and 20 to move, to a certain extent, each in the direction of its own length, in consequence of which the set of strips [9 move back and forth at right angles to the set of strips 20 as the coil springs l4 vibrate.

Means are provided by virtue of this invention whereby the several bands or strips l9 and 20 are positively maintained in their right angular relation, while still permitting the movement of the intersecting bands or strips relatively to each other, in the direction of the length of each strip. This prevents the turning or skewing of the strips toward each other at each intersection of strips and thus maintains the coil springs M in positive position, making for a much stronger spring structure.

The member 22 forming the means last mentioned is of thin sheet metal, or of fibre, or any other suitable material, and is preferably of substantially circular shape, as shown, its diameter being slightly smaller than that of the upperstructure as clearly shown in Figs. 4 and 5, the members 23 acting to supply some friction to the strips. It will be noted that the members 22 cannot move lengthwise along the strips [9 because the strips 20 being fastened at their ends do'n'ot permit this, and likewise the strips l9 prevent movement of the members 22 along strips 20. Yet the strips l9 and 20 are each free to move at right angles to each other, and only so,'at each member 22. Thus, it will be seen that the invention provides means for stifiening the spring structure against diagonal. and lateral stresses, while affording ample resiliency axially of the coil springs. V V

While the members 22 have been shown as being circular in outline-and of a size somewhat smaller than the uppermost coil of the springs, it is obvious that the member l2 may haveany other outline desired, so long as its functions remain. Likewise, as to the particular size of the member, and the offset portions, instead of being are shaped, they may be substantially straight. In fact the member and the offset portions may be varied in size and shape so long as they permit the strips to be threaded there through in a straight non-bent condition.

What is claimed as new and useful is:

A spring structure comprising a pair of vertically spaced frames, a plurality of coiled springs supported between said frames and arranged in transversely and longitudinally extending spaced parallel rows with the axes of said springs in substantial parallelism, a flat straight metal strap extending along each transverse row of springs, a fiat straight metal strap extending along each longitudinal row of springs, all of said straps being yieldingly fastened at their extremities to the uppermost one of said vertically spaced frames, the transversely extending straps intersecting the longitudinally extending straps at points substantially coincident with the axes of said'coiled springs, and a metal disc disposed c0- axially with respect to and centrally within the uppermost convolution of each coiled spring, each of said discs having a substantially flat imperforate central portion disposed substantially in the plane of the uppermost convolution of each coiled spring and integrally formed circumferentially spaced portions offset below the plane of said fiat central portion providing two sets of laterally spaced parallelslots, the slots of one set being disposed substantially at right angles to the slots of the other set, the straps extending in one direction being respectively threaded beneath the uppermost convolutions of said coiled springs and through corresponding sets of slots in said discs andthe straps extending in the other direction being respectively threaded above said uppermost convolutions and through the remaining sets of slots in said discs, the arrangement being such that said discs substantially close the normally open upper ends of said springs and together with, said intersecting straps restrain said upper ends of the springs against lateral displacement.

I EDWARD S. GOLDBERG.

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