US2728381A - Spring mattress and cushion construction - Google Patents

Description

Dec. 27, 1955 G. J. CONRAD 2,728,331

SPRING MATTRESS AND CUSHION CONSTRUCTION Filed May 25, 1954 yr 2a 2\ L Xi I9 Q 3 j w-| a '8 2 2 2g 24 E J/ I9 24 I? r 1 2| f FIG.|

GEOR GE J. CONRAD INVENTOR.

United States Patent SPRING MATTRESS AND CUSHION CONSTRUCTION George J. Conrad, Baltimore, Md. Application May 25, 1954, Serial No. 432,273 1 Claim. (Cl. 155-179) This invention relates to spiral or helical springs and pertains to spring cushion-structures incorporating such springs in their construction.

In spring-cushions, such as bed springs, seat-cushions, spring mattresses and similar resilient bodies, it is desirable where the spiral springs are upright and arranged in rows, to have the tops of the springs substantially larger in size than has heretofore been customary in order to reduce the space or gaps between the tops of the springs, whereby to prevent the superposed cushion or padding from settling excessively between the springs. If such springs with enlarged fiat heads are made of wire round in cross-section, and of suitable gauge for the body of the spring, the extended plane head formed by one or more convolutions of the wire is usually too wabbly crosswise the spring, thereby giving the spring-cushion as a whole undesirable characteristics and properties. The advantages accruing from the employment of the enlarged spring heads may be availed of and the springstructure as a whole perform its functions quite satisfactorily, provided a new type of upright, spiral springs with a specially shaped enlarged head comprising a plurality of indentations as shown in the drawings are used to resiliently tie the enlarged heads together to more evenly distribute the load. It is therefore an object of this invention to provide a new and improved cushion of the type disclosed having springs with enlarged heads and projections extending therefrom to inter-lock with similar projections extending from the enlarged heads of adjacent springs to reduce side movement of the springs and to reduce the spaces or gaps between the tops of the springs to prevent the superimposed cushion or padding from settling excessively between the springs. It is an additional object of this invention to provide a new and improved cushion construction having springs of angular or tapered spiral form with enlarged heads having projections formed therein for attaching one spring to another to distribute a load over many springs forming the cushion or mattress instead of concentrating the load at one point as is now done in cushions or mattresses of conventional construction. It is a further object of this invention to provide a new and improved cushion or mattress construction formed with spiral conical springs flexibly mounted in a frame structure cross braced to distribute a load evenly over a greater area than presently possible with conventional constructions.

Other objects will become apparent as the invention is more fully set forth.

For a better understanding of the invention and its objects reference is made to the accompanying drawings, which in conjunction with the description outline a particular form of the invention by way of example, while the claim emphasizes the scope thereof.

In the drawings:

Figure 1 is a plan view of a spring cushionetructure embodying this invention; and

Figure 2 is a sectional view taken along line 2-2 of Figure 1.

. down through the groove Similar reference characters refer to similar parts throughout the drawings.

In the construction shown in the drawings a foundation frame 10 preferably formed of flat strip material is provided with cross bands 11 to stiffen the foundation and' form a means for anchoring and supporting the lower or smaller end 12 of the spiral springs 13, the lower end of the cross bands 11 are grooved at 14- to receive a lower wire bracing 15 that is anchored in holes 16 in each side of the foundation 10 and runs from the foundation over the lower or smaller end loop 12 of the spring, then 14 of cross bands 11, up and over the other side of the lower or smaller end loop 12 of the spring to each and every succeeding spring in that row in like manner, and the end of the lower wire bracing 15 is threaded through the hole 16 on the other side of the foundation and made secure thereto. The enlarged head 17 of the spring 13 is provided with indentations 18 and projecting portions 19 to enable the heads to be better braced against side sway and to more evenly distribute the load placed thereon. The heads with the indentations 18 are usually used around the outside edge of the cushion-structure and are also used as anchoring posts for small springs 20 and criss- cross bracing 21 and 22. The projecting portions 19 over-lap similar portions 19 on adjacent springs and are held together by the criss cross braces 21 and 22 and intermediate braces 23. The small springs 20 are fastened at one end to an upper frame member 24 and the other end to the indentations 18 as shown in the drawings. The cross bands 11 are attached to the foundation 10 by welding or by any other conventional means of fastening.

While but one general form of the invention is shown in the drawings and described in the specification, it is not desired to limit this application for patent to this par ticular form as it is appreciated that other forms of construction could be made that would use the same principles and come within the scope of the appended claim.

Having thus described the invention, what is claimed is:

Spring mattress and cushion construction comprising a foundation frame and an upper frame superposed to and spaced from said foundation frame, a series of spaced spiral springs between said frames-and formingparallel rows along two directions at right angles, means for connecting the smaller and lower ends of said coils to the foundation frame, the upper and enlarged ends of the springs within the peripheral border of the upper frame having indentations and projections, coil springs connecting the indentations to the upper frame, all the upper and enlarged ends of the coils comprised between the peripheral coils also having projections and all of the projections being in over-lapping relation, parallel cross-bracings lying over the upper and enlarged ends of the coils, said bracings having terminal hooks anchored in the aforesaid indentations of the peripheral coils and additional parallel cross-bracings at right angles to the first mentioned bracings and having terminal hooks anchored about the aforesaid overlapped extensions.

References Cited in the file of this patent UNITED STATES PATENTS 95,984 Bushnell Oct. 19, 1869 823,600. Houston June 19, 1906 1,765,434 Mangan June 24, 1930 1,834,920 Barnes Dec. 8, 1931 2,058,462 Karr Oct. 27, 1936 2,113,377 Krakauer Apr. 5, 1938 FOREIGN PATENTS 273,144 Great Britain June 30, 1927

Images