Spring unit for spring cushions

May 28, 1940.

M. FREUND 2,201,997

SPRING UNIT FOR SPRING CUSHIONS Original Filed June 4, 1936 2 Sheets-Sheet 1

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May 28, 1940

M. FREUND

2,201,997

SPRING UNIT FOR SPRING CUSHIONS

Original Filed June 4, 1936 2 Sheets-Sheet 2

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Patented May 28, 1940

2,201,997

UNITED STATES PATENT OFFICE

2,201,997

SPRING UNIT FOR SPRING CUSHIONS

Morris Freund, Cleveland, Ohio, assignor, by direct and mesne assignments, of one-half to Jacob Kronheim, Shaker Heights, Ohio, and one-half to John C. Lincoln, Scottsdale, Aris.

REISSUED

Application June 4, 1936, Serial No. 83,547 Renewed July 12, 1939

JUN 131944

Claims. (C1..155—179)

This invention relates in general to soft spring cushions for davenports, arm-chairs, etc., and more particularly to spring units for such cushions. At present spring units for soft spring 5 cushions consist of a plurality of rows of soft coiled springs arranged side by side. In these rows each of the springs is individually pocketed, to prohibit contact of coils of different springs ^{Wlth each other and} individually sewed to the 10 top and bottom portion of its respective pocket. The springs of such a unit act individually, no co-operation of the springs with each other being present and therefore a thus built soft spring unit can easily be fully compressed by heavier io loads. To overcome this deficiency the spring unit must be heavily padded so as to retain its desired softness when fully compressed. However, a heavy padding of the spring units is expensive in material and labor, makes the fin20 ished cushion heavy and stiff and causes the cushion to lose its softness as padding material particularly when continuously under compression easily packs.

The general object of the present invention 25 is to overcome the above described deficiencies in soft spring cushions by the provision of a spring unit embodying a plurality of elongated co-operating flat spring-structure arranged side by side, connected with each other and indi30 vidually pocketed with respect to each other in order to avoid contact of the flat spring-structures with each other.

Another object of the present invention is the provision of a spring unit embodying a plurality 35 of individually pocketed, elongated, co-operating flat spring-structures arranged side by side, each of the spring-structures embodying yielding topand bottom-portions yieldingly connected with each other at the ends of said portions.

A further object of the present invention is the provision of a spring unit embodying a plurality of individually pocketed, elongated, flat spring-structures arranged side by side, each of the spring-structures embodying yielding top45 and bottom-portions yieldingly connected with each other at the ends of said portions and all the spring-structures being interconnected with each other at their top- and bottom-portions so as to form a single spring unit.

in addition the invention has certain other marked superiorities, which radically distinguish it from presently known structures. These improvements or superior characteristics embodying certain novel features of construction are clearly 35 set forth in the appended claims and a preferred form of embodiment of the invention is hereinafter shown with reference to the accompanying drawings forming part of the specification.

In the drawings:

Figure 1 is a perspective view of a soft spring 5 cushion partly broken away to disclose the spring unit of the cushion, which unit is built in accordance with the invention.

Figure 2 is a cross-sectional view through the spring unit shown in Fig. 1, the section being 10 taken on line 2—2 of Fig. 1.

Figure 3 is a longitudinal sectional view through one of the pockets of the spring unit shown in Fig. 1, disclosing the elongated flat spring structure according to the invention, the 15 section being taken on line 3—3 of Fig. 1.

Figure 4 is a perspective view of the elongated fiAt spring-structure before its assembly and pocketing and

Figure 5 is an enlarged fragmentary sectional 20 view showing the attachment of one of the ends of a flat spring-structure to an edge-wire, interconnecting all the tops of the flat spring-structures of a spring unit.

Figure 6 is a longitudinal sectional view through 25 one of the pockets of a somewhat modified form of a spring unit for a soft spring cushion and

Figure 7 is a perspective view of the modified fiat spring-structure used in the spring unit shown in Fig. 6. ₃₀ i’teuro 8 is a longitudinal sectional view through one of the pockets of another modified form of a spring unit for a soft spring cushion and

Figure 9 is a perspective view of the modified 35 flat spring-structure used in the spring unit shown in Fig. 8.

Referring more particularly to the drawings, reference numeral 2 represents a soft spring cushion embodying a soft spring unit 3, padded 40 with padding material 4 and enclosed in a covering 5. The spring unit 3 consists of a plurality of elongated flat spring structures 6, pocketed in elongated pockets 7 of a burlap covering 7' and interconnected with each other by means of 45 edge-wires 8 and 9 as will be later described. Each of the elongated flat spring-structures 6, preferably made of relatively thin steel wire bent to sinuous shape, so that the loops 10 of the structure extend substantially parallel to each 50 other, embodies two parallel# arranged seatingand base-portions 1 f and 12 respectively, adapted to be longitudinally extended and/or compressed.

These portions, the upper one ί I being the seating portion and the lower one 12 being the gg βο

3,901,097 end of the soft spring cushion (the curved end) partly extended under the back of the seat.

In the modified form of a spring unit 3” such as shown in Figs. 8 and 9, the top and base portions 31 and 32 of the spring structure 33 are curved to insure an absolute straight seating and base surface of the finished spring unit 3 when the levers 34 and 35 are rigidly secured to each other by means of a clamp 36 and forcibly drawn toward each other by a tension-wire 37. Ulis construction of the spring unit avoids the necessity of connecting the top and base portions 31 and 32 by twine, facilitates slipping of the assembled spring structure 33 into the pockets 7 of the burlap covering 7' and in addition produces a more pliable and softer surface of the assembled spring unit 3.