Патент USA US2118297код для вставки
Patented May 24, 1938 2,118,297 UNITED STATES PAT» 2,118,297 FLEXIBLE MATTRESS SPRING STRUCTURE John A. Douglas, Trenton, N. J., assignor to Trenton Spring Products Company, Trenton, N. 1., a corporation Application July 11, 1936, Serial No. 90,111 2 Claims. This invention relates to a mattress structure and more especially the inner spring portion thereof. The chief object of the invention is to provide 5 in a mattress a spring structure which will hold the sides of the mattress straight and which will be relatively ?exible and yet include therein a considerable degree of rigidity, it being recog nized that normally these two features are op~ posed to each other. The chief feature of the invention consists in forming the spring structure, for inclusion in a mattress, of a plurality of springs of the tied or untied type and associating therewith border 15 Wire means whereby the sides of the mattress therebetween is a side border wire member also of U-shaped form for the purpose hereinafter set forth, and including the side border portion 23 and the two ends 24. The portions 2! of each unit preferably are of equal length and the two 5 extensions 2d- of the U-shaped members 23-24 extend towards each other in alignment and ter minate short of meeting engagement. The springs are arranged in longitudinal and transverse rows. Encircling the entire border 10 wire portions 2!], “22, 2! and 23 is a helical struc ture 30 and the same also encircles the end turn of the marginal coils in the two longitudinal out side rows as at 3! and encircles the end turns of each of the coils of the two transverse end are held straight, the border Wire means being rows of coils as at E2 and the corner coil com articulated thereby providing for ?exibility in the mattress structure, the rigidity of the spring mon to the marginal transverse and longitudinal structure being obtained by reason of the bor 20 der wire arrangement. The full nature of the invention will be under stood from the accompanying drawings and the following description and claims: In the drawings, Fig. l is a top plan view of 25 one embodiment of the invention. Fig. 2 is a side view thereof, the dotted lines therein indicating a ?exed portion of the struc ture. '30 (Cl. 5—249) ' Fig. 3 is a view similar to Fig. l. and of a more complicated form of the invention. Fig. 4 is a view similar to Fig. 2 and of the form of the invention shown in Fig. 3. Fig. 5 is an enlarged plan view of a connec tic-n between adjacent coils and an extension 35 of the border wire. Fig. 6 is a view similar to Fig. 5 and of a still further modi?ed form of the invention. In the drawings it! indicates a plurality of double cone, coil springs which have their oppo pO site ends‘ ll tied or knotted as at I2 to an ad jacent turn i3. In knotting these ends, the im mediate end I4 is turned down toward the in terior of the spring structure so that the barbed or sharp end of the spring wire would not ex 45 tend into the covering and other material that surrounds the spring structure included within the mattress. Herein the border wire arrangement includes an end portion 20 having two side extensions 2i connected by a radius portion 22. Each side of the mattress is similarly provided and each end of the mattress is similarly provided with the re sulting U-shaped border wire member 20, 2| , 22. The two aligned end portions 2| terminate 55 short of meeting engagement and interposed rows as at 33. The number of encircling en gagements between the helix 3t and the adja cent turn of the coils is determinable to a large 20 extent by the diameter of the coil. As a general rule two to four engagements are provided. By this arrangement, all of the marginal coils are tied to the marginal border wire arrangements. In view of the fact that the extensions 26 are 25 longitudinally positioned with reference to the transverse rows of coils, the adjacent coils in transverse rows have their upper turns connected together by the helices it which terminate short of the border wire or helix 3?] connection. These 30 connections are indicated by the numerals It! and the ends 42 in the present instance are not connected to the border wire or border wire en circling helix. The extensions 24 terminate as at 25 and these 35 are spaced apart, the center to center spacing, approximately between adjacent coils in a trans verse row in the present instance. The helix 45 terminates short of border wire or border wire helix engagement as at 46 and simultaneously 40 encircles as at d? by a plurality ‘of turns two ad jacent coils it and the extension 26. Each end 59 of border wire side portion 2! encircles the connection between extension 24 and border wire 23 and herein the same is illustrated 45 as of elongated character. The loop 59 thus formed is tied as at 5! to the main portion 2| of the border wire. An eye portion may be em ployed in place of the loop. However, an eye portion does not provide the accommodation in- 50 dicated by the dotted lines in Fig. 2 but necessi tates the inward bending of the frame and springs when one of the end sections is bent out of the plane of the middle section. It will be apparent from an inspection of Figs. 55 2 2,118,297 encircles the adjacent sinuous portions of the 1 and 2 that the border wires 2 will bend slightly same coil. at their midportions so that the mattress may be partly folded so the housewife can readily handle the same. Also, the mattress may be folded in a transverse direction and to a greater extent than in the longitudinal direction by rea son of the jointed. connections of the end sec tions to the mid-section. The sectionalized bor and when the extension 2213 is associated there with, this also is provided with a sinuous portion making four or ?ve inter?tting sinuous portions encircled by the helix. In this form of the in vention, similar numerals of the two hundred series indicate similar or like parts, the addi tional sinuous portion in the second turn being indicated by numeral 269 and registering with der wire arrangement permits of this articula tion and also insures that the sides of the mat tress are held straight and the edges are rela tively rigid, yet by reason of the construction employed, there is not only provided ?exibility generally regarding various portions of the mat the serpentine end. mattress will accommodate itself to the person’s body thereon. In Figs. 3, ‘i and 5 is illustrated a modi?ed form of the invention, wherein certain adjacent said is to be considered as illustrative and not restrictive in character. a better interlocking arrangement without de set out as follows: a In this form of the invention, the coils H are of untied character and the ends i M. are pro; vided with a sinuous arrangement H2. The ad~ 39 jacent coil approximately diametrically opposite 3.5 its end 9M, is provided with a similar serpen tine type portion i 52a and the two portions inter t and are encircled by the helix Hill as at Ml and by a plurality of turns of said helix. In this form of the invention also-see Fig. 5-—the ex tension !‘24 of the U-shaped border wire H3 is provided with a sinuous portion l2lia and this is included between the two sinuous portions I I2 and 5 Hat and the helix encircles the three inter portions. 4.0 ?tting The longitudinal marginal coils MD are pro vided with a third and intermediate sinuous por tion H21) and the border wire portions l2! and :23 at Nita and 523a, respectively, are provided with these sinuous portions that inter?t with the adjacent sinuous or serpentine portion of the adjacent coil and the helix i3! encircles the same. Similarly, the border wire portion 52!] includes the sinuous portions lZiia. and the coils i adjacent thereto are provided with the sinu 50 ous portions Ha and the helix E32 encircles same when inter?ttingly associated together. It will be apparent in this form of the invention, the coils are of untied character. In Fig. 6 there is illustrated a further and 56 more complicated form of the invention wherein each coil Eli.‘- has a sinuous or serpentine portion in the turn immediately adjacent the end turn and end of the coil and the helix simultaneously Various modi?cations have been thus disclosed as well as suggested 20 portions are arranged in a sinuous manner for 2.5 ' While the invention has been described in great detail in the foregoing speci?cation, and 15 similarly illustrated in the drawings, the afore 15 tress but localized flexibility as Well so that the struction or reduction of the hinging character embodied in that type of connection. Similar numerals of the one hundred series indicate like or similar parts. The differences will be brie?y In this form of the invention, there are two adjacent serpentine portions per coil, making three, or four to the two adjacent coils > hereinbefore and these, together with others 20 which will readily suggest themselves to persons skilled in this art, are all considered to be with in the scope of this invention, reference being had to the appended'claims. The invention claimed is:-— . 1. A unitary articulated spring structure for incorporation in a mattress, having substantially semi-rigid parallel top and bottom frames and a plurality of parallel coil springs constituting the sole spacing means therebetween, the coils 30 being arranged in rows, each frame being iden- ' tical to and in substantial registration with the other, each frame including two U-shaped semi rigid border wire members forming end borders and the arm portions thereof forming side border portions, the arms of each end member being .35 directed toward the arms of the other member, and two intermediate U-shaped semi-rigid border wire members having similar relationship there between and with the midportions completing 40 the frame sides and in alignment with the aligned ' " arm portions of the end members, a loose hinge type connection between the ends of the aligned arm portions of the end members and the inter mediate member substantially at the ends of the .45 midportion thereof, the arms of said intermediate members being directed towards each other and aligned and terminating adjacent each other and remote from the midportions of said intermediate members, flexible helix means connecting all mar 50 ginal coils to the immediate adjacent border forming portions of the wire frames, and flexible helix means connecting the end turns of adja cent coils in adjacent rows. 2. A device as de?ned by claim 1, character 55 ized by the loose pivotal connections each being of elongated loop character. 7 JOHN A. DOUGLAS.