US1838455A - Spring mattress - Google Patents

Description

Dec. 29, 1931.

E. SJOSTRAND ET AL SPRING MATTRESS Filed May 1, 1930 2 Sheets-Sheet 1 E 15 7 0.3 Fra 71c! L J'Seyfirour W (1W 2 Sheets-Sheet 2 gwuewtorj l \H l E 22570 776172! I L, J eymour s51, Wm M 'Dec. 29, 1931- E SJOSTRAND ET AL SPRING MATTRESS Filed May 1, 1950 Patented Dec. 2 9, 1931 UNITED STATES PATENT orrlcr ERICK SJ'OSTRAND AND LAWRENCE J. SEYMOUR, OF WASECA, MINN 1115012 3- SPRING. vmrtrnnss Application filed May 1,

This invention relates to spring mattresses and particularly to a spring mattress which includes a frame adapted to be mounted on or supported by the bed frame itself.

The present invention designs to provide a spring mattress which entirely does away with the use of coiled bedsprings, particularly the vertical bed springs wherein double coils are used, one inside of the other, which are unsanitary and prevent proper cleaning from lint and dust.

A further object is to provide a spring mattress which has all the resiliency of the presentcoil spring construction and atthe same time eliminates the use of these coiled springs. r

' A further object is to provide a spring mattress which includes double acting brack ets on each corner of the mattress which suspends'the mattress fabric and which is resiliently connected to an under frame, which in turn is supported upon the bed frame proper. r

A further object is to provide means whereby all side sway of the mattress is prevented without restricting its resiliency.

A further obj ect is to provide means whereby the upper fabric of the spring mattress may be tensioned from time to time.

Other objects will appear in the course of the following description. 1

Our invention is illustrated in the accompanying drawings, wherein V Figure 1 is a side elevation of a spring mattress constructed in accordance with our invention Figure 2 is an end elevation of-the same;

Figure 3 is a fragmentary detailedplan view of one corner of the under frame of the mattress; l

Figure 4 is a vertical sectional view of one of the supporting brackets and a portion of the connecting rod;

Figure 5 is an-under side elevation of the bracket shown in Figure 4:.

Our improved mattress includes in its construction, the end angle irons 10. These end angle irons are designed to be connected to the fabric 11, which is preferably of wire, by means of springs 12 having hooks at their 1930. Serial No. 449,034.

ends engaging respectively in the end angle iron and in the fabric. Attached to each angle iron 10 by the pins 14 are the brackets 15, these brackets as illustratedin Figure 5 being each formed with a middle circular socket 16 and two legs 17 and 18. V

The legs are open on their inside faces and the legs are cut away at 19 so as to reduce the weight of metal as much as possible. The leg 18, it will be seen, is angulariy disposed with reference to the leg 17 of the bracket. The leg 1? at its upper end isconnected by pins 14 as previously described to the angle iron 10. There are preferably two of these brackets for each angle iron 16, the brackets beinglocated adjacent the ends of the iron 10. There are two of these brackets, therefore, at each end of the mattress and these brackets are connected bytwo longitudinally extend ing tubular rails 26 formed of metal pipe, the rails being inserted within the sockets 16 and being screw-threaded at their ends for engagement with the lock nuts 21 which bear againstthe ends of the sockets 16. By turning these lock nuts in one direction or the other, it is possible to force the brackets away f om each other or permit the brackets to move inward toward each other,

Disposed on a level below the tubular rails is an under frame, rectangular in plan view and formed of angle irons, the angle irons being designated 22. This frame is less in area than the area ofthe frame defined by the end angle irons and the fabric and the corners of the under frame are braced by the corner braces 23 riveted to the angle irons.

The lower ends of the brackets are formed to provide inwardly projecting flanges or webs 24: and are perforated for engagement by the hooked ends of a plurality of coiled contractile springs 25 shown as three in numher. the opposite ends of the springs being hooked and engaged with perforations 26 in the end angle irons 22 of the under frame. These angle irons 22 are provided with angular'hangers 27 which are adapted toenover the angle iron bed ra is of a metal bed frame.

If a mattress is intended-to be supported upon a bed frame of Wood having slats 29, then this under frame rests upon these slats.

It will be seen that with this construction the under frame supports the mattress by engagement with the bed frame, that the brackets are supported from the under frame by the highly tempered tension springs and that the end angle irons and the brackets C3,). not move inward toward each other because they are held apart by the tubular side rails 20. Thus the mattress is suspended by the springs 25. Inasmuch as there are three of these springs at each corner, the mattress is held from any swaying movement as any latteral movement will be resisted by the angularly disposed springs 25 while all three of the springs 25 will yieldingly resist the downward movement of the mattress. The fabric 11 is supported at intervals by the springs 12. By turning up on the nuts 21, the brackets and, of course, the end angle irons 10 may be forced away from the brackets and angle iron at the opposite end of the bed and thus the mattress may be tensioned to any desired amount.

The desirability of this mattress lies wholly in the suspension of the top element of the mattress (the fabric 11 and the springs 12) from the under frame, this construction giving the same resiliency as the present coiled springs give but eliminating a great number of coils and noise-making wearing parts. This mattress can be used equally as well on a wooden bed as on an iron bed. T he brackets are preferably made of cast aluminum alloy in order to secure lightness of the spring over cast iron brackets.

Obviously the tubular side rails 20 may h ave threaded engagement with the socket l6 and thus by rotating the tubular rails 20, the brackets may be forced further apart from each other or allowed to come toward each other, but we prefer the construction illustrated in Figure l \i 'her e' the sockct 16 is unscrew-threaded as regards its interior face. lVe do not wish to be limited, however, tothe use of a screw-threaded rail 20, though. this provides for adjustment from time to time. It is necessary that the lower leg 18 of the bracket 15 be angularly disposed with relation to the upper portion in order to prevent the lower end bracket coming in contact with any portion of the bed as may possibly happen with a bow end bed or a straight wooden bed. Obviously, however, we do not wish to be limited to this particular formof bracket.

We claim 1. A spring mattress including a plurality of normally upright supporting brackets at each end of the mattress, upper end members connected to the upper ends of the brackets, a fabric web resiliently engaged at intervals with the upper end members, a rigid under frame adapted to rest upon a bed frame,

springs yieldingly connecting the lower ends of the brackets to the under frame, and longitudinally extending rails disposed in a plane between the under frame and the fabric web extending between the brackets at opposite ends of the mattress and holding said brackets from inward movement, each bracket having a socket intermediate its ends and loosely receiving the extremity of the rail, each ex termity of the rail being screw-threaded and nuts engaging the screw-threads and bearing against the corresponding brackets whereby the brackets may be forced further from each other or permitted to move toward each other to thus tension both the upper and lower springs.

2. A mattress of the character described, comprising end angle irons, a plurality of brackets attached to each angle iron and extending dovnward therefrom, each bracket being formed with a. medially disposed socket, longitudinally extending rails loosely engaged in the sockets of opposite brackets, and screw-threaded nuts engaging said threads and bearing against the brackets, a rigid rectangular under framc less in length than the distance between the end angle irons and brackets and having means whereby it may be engaged with the bed frame and supported thereon, coiled contractile springs connecting said under frame to the lower ends of said brackets, a fabric web, and coiled contractile springs connecting said fabric web with the first named angle irons.

3. A mattress of the character described. comprising end angle irons, a plurality of brackets attached to each angle iron and extending downward therefrom, each bracket being formed with a medially disposed socket, longitudinally extending rails loosely ongaged in the sockets of opposite brackets. and screw-threaded nuts engaging said threads and bearing against the brackets, a rigid rectangular under frame less in length. than the distance between the end angle irons and brackets and having means whereby it may be engaged with the bed frame and supported thereon, a plurality of horizontally disposed coiled contractile springs connecting the lower end of each bracket to the adjacent end of the under frame, certain of the springs being disposed in divergent relation to each other to thereby counter-act lateral sway, a fabric web, and coiled contractile springs connecting said fabric web with the first named angle irons. V

In testimony whereof we hereunto aflix our signatures.

ERICK SJOSTRAND. LAWRENCE J. SEYiLlOUR.

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