US1722584A - Resilient bottom for couches, chairs, etc. - Google Patents

Description

H5330? w29 v.I .KRONHElm/i 17225` RESILIENT BOTTOM COUCHES, CHAIRS', ETC

A Filed June 9, 1928 z sheets-sheet 1 gnou/dorf Y, Iuly.30, 1929. J. KRONHEIM RESILIENT BOTTOM FOR coUoHEs, CHAIRS, E Tc y2 Sheetsf-Sheetfama /fnaNHE/M Parenteel .any so, ieee.

.JACOB KRONHEIM, F CLEVELAND, OHIO.

RnsILrEN'r BOTTOM Fon coUcHiss, CHAIRS, Ere.

Application filed June 9,1192'8. Serial No."284,`029.

My invention relates to resilient .bottoms for couches,.chairs, box springs, and likear- 4ticles of manufacture. In general my o bject is to provideA a durable bottomof exceptional resiliencyV and low cost, which will greatly simplify the steps usually taken in manufac; turing and upholstering articles such as herein mentioned. In that connection -reference may 1,664,934, dated April 3, 1928, for a chair or couch, thepres'ent invention being an rm-` provement in part thereover, all as hereinafter shown and described and more con cisely set forth in the claims. 1

Referring first to the accompanying drawings, Fig. l is a top view, on a reduced scale, of a resilient bottom-constructed according to' my invention. Fig. 2 is a vertical section, on a slightly larger scale, of the bottom attaehed to a Wooden frame, Such as a couch or chair frame. Fig. 3 is a bottom View of the bottom, partly broken away in places, stretched Within a rectangular frame. Fig. 4 is'a perspective view of one corner of the bottom, and Fig. 5 a sectional View thereof, showing the mode and manner of connecting and seating the main springs.

In constructing a chair,'davenport couch, or box spring, the general practice is to build a suitable frame iirst, then install a spring bottom in the frame, and finally covcr'or enease the assembledparts with textile fabries. In order to simplify operations of that kind, I provide a bottom AM which is constructed and assembled as a separate unit in the shop, and which may be manufactured and sold as a separate article, and readily installed by any manufacturer of furniture in frames of standard sizes.

This bottoni -A- is a composite structure built as follows: l

A sheet of strong canvas, duck, or other closely Woven material 2 is hemmed to enclose a wire frame 3 of somewhat smaller size than the opening in the frame B within which it is to be installed. Separate strips 4 of clo'th of lighter weight than the canvas are sewed to the bottom face of Sheet 2 parallel with three sides thereof and contiguous to hem containing Wire 3. These border strips provide loose flaps which are tacked to the Wood.- enA frame B eventually. A large piece ,6 of loosely-Woven cloth, such as heavy burlap is sewed to Vthe top of canvas piece 2, and

behad to my Letters Patent No.'

these pieces are stretchedv tightly in iacial l contact within wire frame 3. A series `of coiledv Wire springs 7 of hour glass shape, or any other form, are seated upright in spaced relation in rows between the sides of Wire frame 3, with the circular bottom loop 8 of each spring seated partly upon canvas piece 2 and partly upon the burlap covering piece'.

6. Thus each bottom loop 8 is in the form of a coil with the extremity 9 of the wire detachedor free-from the body of the coil so that this extremitymay be caused to penetrate and pass through the loosely Woven body or meshes of the top burlap piece 6 when the spring is seated thereon'and rotated by hand during the assemblying or 'building operations of the bottom. In that proceeding the sharp end 9 of the Wire is threaded in and out of the burlap several times so that the bottom loop or coil 8 is interfretted and interloclied with the burlap at -several places radially of the spring, thereby .anchoring and fastening the spring in a very simple and quick Way to the fabric base.

Each spring is thereby prevented from shifting horizontally from itsA selected posi'- tion or seat upon the canvas, and the spring is also held down 1n place upon the canvas and cannot be easily disconnected or displaced when raised or lifted. The assemblying of the springs inA spaced relation and in a group is greatly expedited by usinT :prings with free ends coiled and interlocked With the. burlap as described, and the use of lan open mesh fabric upon the top of a closely-Woven material promotes easy attachmentand a firm seating for the springs.

Having the required Vnumberof springs attached to the flexible base as described, the

upper ends of the springs are connected to gether, in any suitable Way. For example,

the springs may be connected together by twine and each spring placed under a certain degree of compression by attaching the twine to Wire frame 3. The tied spring structure may now be readily installed Within an open Wooden or metal frame B by connecting the wire frame 3 and the border edges of the fabric to the four sides thereof. Preferably three sides of the Wire frame are connected by closely coiled tension springs 10 to three metal strips 11 which may be vscrewed or nailed to three sides of the main frame B,

While the fourth side or front border edge r'of wire frame 3 is connected to the front rail 12 offrame B by short and relatively stili edges of the side. members of'main frame B,

thereby closing the space at three sides of the resilient bottom. Tension springs 10 and 14k are of sullicientV number and strength to stretch the :flexible bottom A tightly within frame. B, and they cooperate with the compression springs`7 in yieldingly supporting theload. The movement or' bottom A downwardly under the load is greatest where the load is applied locally but nevertheless the load is in part distributed to all of the supporting springs, and the border flaps'ir are free toflex without strain where fastened to the respective frames when bottom A is under load.

In completing the installationV a suitable covering encases or is stretched over the springs carried by bottom A and in a couch or chair it is also customary to place a seat or cushion thereon, as indicated in dotted lines in Fig. 2. However, bottom A with its complement of seating and supporting springs, may be vmanufactured and sold as a complete unit to manufacturers of furniture and similar household goods, and installed by them in frames of any suits able character or kind, and the appended,

claims therefore .are not to be construed as limiting the use of the invention solely to the articles specifically enumerated herein.'

Vhat I claim, is: l .1. A resilient bottom for couches, chairs,

etc., comprising a flexible base member and a fabric covering for said member and in\ facial contact therewith, together with coiled springs, seated upon said base member and having seating portions interlocked with said covering.

2. A resilient bottom for couches, chairs, etc., comprising superposed layers of woven materials, and a series of coiledwire springs seated upon said layers and interfretted with the upper layers of said woven materials.

3. A resilient bottom for couches, chairs,

etc., comprising a base member of woven fabric, and a wire frame therefor, a covering of woven 'fabric aliixed to the top of said base member in facial contact therewith, and coiled wire springs seated upon said base member and interloclked with said covering. v

4. In couches, chairs, etc., including a frame structure, a resilient bottom unit comprising a wire frame, a base sheet of closely woven fabric stretched within said frame, flaps at the sides ofthe said frame adapted to be attached to the bottom rail of said frame structure, springs seated upon said sheet of fabric, covering means for said base sheet, securing` the seating portions of said springs to said sheet, and helical springs connected to the border edges of said base sheet and to said -wire frame for connection of said resilient bottom unit to said frame structure.

5. A resilient bottom unit for couches, chairs, etc., comprising a flexible base sheet,

, reinforcing means at the border edges of said sheet, a series of coiled springs seated'upon said sheet, and means extending over the top of said sheet and in facial Contact therewith for holding the seating portions of said springs in situ.

'6. A resilient bottom unit for couches, chairs, etc., comprising a rectangular flexible base member, coiled'wire springs seated upon and fastened to said basemember, a series of helical wireisprings connected to the rear and end edges of said base member, anda series of short stiffer springs connected to the-front side of said member. Y

7. A resilient bottom for couches, chairs, etc., comprising a flexible base member having a top covering of loosely woven material in facial Contact atlixed thereto, coiled springs having base loops terminating in free ends interlocked with said loosely woven material while seated upon said base member, and means at all border edges of said base member for suspending said assembly of parts yieldi-ngly within an open frame.

JACOB KRONHRTM

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