US1798885A - Spring cushion - Google Patents

Description

Much 31, 1931.- FgKA'RR 1,798,885

SPRING csmronI Filed. June 1, 1925 In wen'or: ,francis farm Patented Mar. 31, 1931 FRANCIS KARR, or HOLLAND, MICHIGAN SPRING- CUSHION Applcation filed .Tune 1,

This invention relates to a spring assembly for use in beds, mattresses, cushions and the like in which helical springs are employed.

One of. the objects of the invention is the provision of new and. improved means for connecting the adjacent portions of the coil springs constituting the spring assembly in such a manner that they will be held in proper spaced relation under all conditions of service.

Another object of the invention is the provision of new and improved means for connecting the terminal 'coils of adjacent rows of helical springs in a spring assembly in such a manner as to provide a double hinged connection between the rows and insure a .unitormty in freedom of lmovement of the spring units constituting the assembly.

A still further object of the invention is the provision of a new and improved spring assembly for beds, mattresses, cushions and the like that is cheap to manufacture, simple in construction, easily assembled, comfortable to the user, noiseless, and one that is not likely to become broken or get out of order.

Other and further objects and advantages of the invention will appear from'the following description taken in connection with the accompanying drawings, in which 0 ,Fig 1 is a plan view of a portion of a seat cushion assembly;

Fig. 2 is a side elevationthereof, with parts brokenaway;

Fig. 3 is a plan view of one of the helical springs ;V f

Fig. 4 is a plan view of a modified' form of cushion assembly, with parts broken away;

Fig. 5 is asimilar view showing a still iurther modified form of the device. i A

On the drawings, the reference character 10 designates a portio'n of a spring assembly i which is adapted tobe employed in a mattress, bed, cushion or the like, but which `for convenience will be termed a cushion assembly. The assembly- 10 comprises a group of coil springs 11 which are preferably arranged in rows, both longitudinally and transversely ofthe cushion. They .are held in assem- I 5 bled relationbysuitable means as the con- 1925. Serial No. $3,899.

necting helical coils 12 for forming a double hinge between adjacent rows of the springs.

The springs 11 may be arranged so that the connecting coils 12 Will extend either longitudinallyof or transversely to the cushion assembly, but for convenience of description `they will be considered as extending transversely thereto.

In the preferred form of the device, as shown in Figs. 1, 2 and 3, each coil spring l1 terminates at each end in an enlarged coil which is provided at opposite sides of the spring with shouldered or distorted portions which are adapted to be engaged by the' connecting helical coil 12 for preventing relative lateral androtativejmovement of the terminal coils. These shouldered portions are so arranged that when the springs 11 are assembled they lwill be lSubstantiall parallel, will lie in the same plane, and the s ouldered portions of one spring will be contiguous to the shouldered portions of adjacent y sprin These shouldered portions are adapted to lise engaged by the connecting coils 12 for holding the springs 11 from rotating or moving laterally relatively to each other. In the .form of the device selected to illustrate one embodiment of the invention the shouldered portions are formed by providing one or more oifsetsin each end and at an intermediate portion in the terminal coils 15 of each spring 11'. Preferably the ends and parts of the terminal coils opposite to the ends are formed into sinuous portions 13 and 14 that are substantially parallel, whereby when thesprings are assembled the corresponding sinuous portions of the springs inthe transverse row of the cushion assembly will lie alongside of and be contiguous to those in the adjoining rows for-'en aging the connecting coils 12. The inwardly extending` offset portions 16 and the outwardly extending offset portions 17 forming the sinuous portionsl of the terminal coils 15 form shoulders for engaging the coils of the spring 12 for preventing relative rotation orlateral movement of the helical springs 11, as clearly shown in Fig. 3 of the drawings.

The shouldered or sinuous portions 13 and 14 of each spring extend in the same general The substantialiy straight, as shown at the left in Fig. 1.`

means of this arrangement the spring assembly is substantially rectangular. In assembling the springs as shown in Fig'.

- 1, they are placed in rows transversely with the sinuous portion of the .springs of one row alongside those of the adjacent row, after which the connecting helical coils 12. `are threaded onto the sinuous portions by rotating said coils. The diameter of the connecting helical coils 12`is 'such as to extend about thecontiguous outwardly extending oisets. 17 and between the opposed inwardly extending oisets 16 of the adjacent rows ot springs whereby the adjacent rows are connected together by a double hinge that is, the. 0pposedsprings of adjacent rows are connected together by the helical .and arel each hinged thereto independently of the other, which permits a free hinge movement between the lrows and results in a remarkable flexibility of the spring assembly. The shoulders formed by the bends in thespring will prevent rotation and relative lateral movement of the helicalsprings 11 and will prevent accidental disengagementl of the interlocked arts.

' After the parts are assembled, the ends of the connecting helical coils 12 are properly bent asfat 22 to prevent accidental removal of the coils. A

By providing each of the coil springs with bent 4or distorted portions at opposite sides of the terminal coil at Aeach 'end of the spring, 'the springs 11 may 'be assembled without regard to rights or lefts, top' or bottoni. In

. other words, the springs are interchangeable and reversible. This is 'any important feature of;` thev invention since -itIacilitatestas-l semblyA and simpliiies replacement.

In practice, the springassembly is preferably composed of springs having right and left turns in order to prevent warping er objectionable distortion of the assembly as is usual in suchl construction, but this is immaterial so far as the act' of assembling thel springs is concerned.

In the modified form of the device shown .in Fig. 4 the offsetportions at the intermediate part of the terminal coil are much more extended than in the formpreviously described. As shown in Figr4, the intermeldiate portion 23 Qi the terminal coil 24 ofthe spring 25 isprovided with an inwardly extending otlset 26 and with alined outwardly extending offsets 27 at each side of the oiset 26. Each tree end 28 of the terminal coil 24 extends substantially parallel with the portion 26 and is shown as being of substantially the same length although this is not necessary. The end 28 is provided with an inwardly extending offset 29. A portion 31 of the terminal coil between the'oset's 26 and 29 is substantially strai ht or slightly curved for forming a marginstraight edge when the springs areassembled. Y)

In assembling the springs, the portions con.- taining the offsets 26 and 29 are placed alongside each other and the connecting helical coils 12 threaded thereon as.v in the device I `lonly a single coil, the oii'sets 26 and 27 are large enough to accommodate several coils."

When the parts are assembled, the connecting coils 12 will engage the shoulders formed by the oiisets 26, 27 and 29 and by the bends at 33, 34 and 35, and prevent undesirablelateral movement of one coil relatively to another, but at the same time permitting a hin e movement between the adjacentprows of co1 s along the spring '12.

The formfof the device shown 'in Fig. 5 differs from that shown in Fig. 3 in that the end 40 of the terminal coil 41 is provided with a singleoset portion 42 and the intermediate portion of the coil opposite the oli'- set portion 42 is provided with a comparatively short straight portion 43. The portions 42 ,and 43 are substantially parallel l and the side.44 of the terminal coil is substantially straight whereby the marginal edge of a cushion assembly will be substantially straight.7

In assembling this type of spring the offsets 42 of adjacent springs are placed opposite each other and the connecting coil 12 'is threaded about the straight portionsl 46 and 47 and extends -across the space between the offsets 42.. The straight portions 43 of one transverse row will necessarilylie contigu'ous togthe straight portions 43 of the ltions previously described.

n In all forms of the device, a double hinge between transverse rows is formed and the shoulders or bends in the .spring engage the coils of the connecting coil 12 and prevent unnecessary movementof the springs 11.

This arrangement results in a spring assembly that has flexibilityr of movement, is noiseless, and that is capable of "forming a.

cushion, mattress and the like which is substantially rectangular in form.

llhile the connecting coils 12 are shown as extending transversely to the spring assembly, it is understood they may extend otherwise. It being such an obvious departure from the construction shown it is not thought necessary to illustrate and describe the saine. l

It is thought from the foregoing taken in connection with the accompanying drawings that the construction and operation of my device will be apparent to those skilled in the art, and that various changes `in size, shape, proportion and details of construction may beinade without departing from the spirit and scope of the appended claims.

I claim as my invention:

l. In a spring assembly, a plurality of rows of coil springs, each spring being provided with a terminal coil having a single inwardly extending offset, the offsets of one row of coils being arranged opposite the oifsets of an adjacent row of springs, and a connecting coil extending parallel with said rows and threaded on said terminal coil at each side of said offsets to form a double hinge, said connecting coil extending across the space formed by said o'sets and between the same, said connecting coil connecting a plurality of springs of one row with a plurality of springs of an adjacent row.

2. In a spring assembly, a plurality of rows tion at opposite sides thereof, the sinuous portion of one coil being arranged opposite that of the adjacent coil of an adjacent row and a connecting coil extending parallel with said rows and threaded on the sinuous portions of adjacent coils to form a doubleV hinge, said connecting coil extending across the space formed by the sinuous portions and between the samesaid connecting coil connecting a plurality of springs ofone row with a plurality of springs of an adjacent row.

3. A cushion spring assembly comprising a plurality of rows of coil springs, the terminal coil of each springbeing provided with distorted portions, the distorted portions of the springs of one row bein arranged opposite the distorted portions of adjacent springs of an adjacent row, and means engaging about and between said distorted portions for forming a double hinge between adjacent rows of said springs and for preventing rotation of said coil springs.

4.. In a spring assembly,aplurality of rows of coil springs, the springs of adjacent rows having portions provided' with shoulders,

said portions of adjacent rows being arranged opposite eachl other, and a helical arranged parallel with said rows and connecting a plu. rality of springs in each of said rows, extending about andcbetween the portions of adjacent springs of adjacent rows for connecting said rows of springs together and for preventing rotation pf the individual springs.

5. In a spring assembly, rows of coiled springs, each spring being provided with a terminal coil having distorted portions at opposite sides thereof, each of said distorted :portions comprising an offset extending inwardly, and a plurality of offsets extending outwardly,relative to said coil, the adjacent distorted portions ofthe coils of'adjaeent rowsof said springs being arranged in pairs and spaced apart transversely of said rows, and helicals each extending parallel with saidirows and extending about the outwardly extending oflsets of adjacent rows and between the inwardly extending offsets of each pair of distorted `portions-of two adjacent rows of springs for hingedly connecting the `springs of each pair together.

l 6.( In al spring assembly, a plurality of rows of coil springs, each spring being provided with a terminal coil having a plurality of offset portions at opposite sides of said coil, said offset portions extending inwardly and outwardly relative to said coil, the offset portions of adjacent springs of adjacent rows being spaced transversely of said rows, and helicals for connecting the adjacent springs of adjacent rows together, each of said helicals extending about the voutwardly extendi' ing offset portions of adjacent springs of adjacent rows and between the inwardly extending offset portions thereof for hingedly connectingsaid last-named springs together. 7 In a spring assembly, a plurality of rows of spiral springs, the springs at the ends of the rows being arranged in rows transversely to said first-named rows, and each spring having its terminal coil at one side thereof providedwith a plurality of distorted portions, the distorted portions of the springs in said` second-named rows being arranged in pairs, the adjacent distorted portions in each pairy being arranged alongside each other, and helicals parallel with said first-named rows, each extending about and between a plurality of distorted portions of 4 a pair of distorted portions of said secondnamed rows.

A8. In a spring assembly, a plurality of rows of spiral springsthe springs at the ends of said rows being arranged in rows extending transversely to said first-named rows, the. terminal coils of the second-named rows of spirals being provided with distorted portio'ns forming shoulders spaced apart, said distorted portions being arranged-in pairs, each pair comprising adjacent distorted portions of adjacent springs in l`said secondnamed rows, arid helicals extending parallel with said first-named rows and extending about and between the distorted portions of said pairs and engaging said shoulders, the portion of each helical between the shoulders lll lati! o each spring. being at least substantiallya s complete turn of the corresponding helical. 9. In a spring assembly, rows of coiled springs having offset portions, certain of said 54 olset portions'being 'arranged in pairs alongside each otheri and a helica-l parallel with said rows extending about. the members of each pair of said offset portions for connecting them together, each of saidl oli'set por- A Y tions having shoulders in engagement with said helical, one of theturns of' said helical between the shoulders of the 'offset portion-fof one spring being interposed between the adjacent springs for holding the same Separated. A

10./In` a` spring assembly, spiral springs c arranged in rows, certain of said springs being arranged oposite each ther in pairs, one spring of each pair having a distorted porl I 2,0 tion provided with shoulders, a helical extending longitudinally of said rows and about said distorted ortion and the terminal coil of theother sprmg for connecting the springs of one pair together, said helical adapted toQ engage said shoulders for preventing rota tion of the corresponding spring, a turn of said helical between 'said shoulders being in-l terposed between said springs for holding them apart. w

In testimony whereof-Ialix my signature.

' FRANCIS KARR.

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