Патент USA US2105115код для вставки
:Jam. 11, 1938. w. w. GLEASON ' UPHOLSTERY SPRING ASSEMBLY Filed July 20, 1-936 . 2,105,115 Patented Jan. 11, 1938 25105415 ~ 'UNITEJD‘LSTATES PATENT OFFICE‘ 27,105,115 l UPHOLSTERY SPRING ASSEMBLY William W. Gleason, Chicago,‘ Ill., assignor to Nachman Spring-Filled Corporation, Chicago, 1,111., a corporation of Illinois ‘ , Application July 20, 1936, Serial No. 91,462, r 1 Claim. One object of the present invention is to pro vide a spring assembly .of theall-metal type used for upholstery purposes andparticularly for the manufacture of seat cushions of all typesand for' "5 mattresses, wherein the corner portions of the structure are re-inforced for the purposes of rendering the whole unit less liable to buckle under the lateral pressures exerted upon the same in forcing them into place in the cover struc (c1. 5-260) portionsto the terminal coils of said cornersprings satisfactorily-to prevent relative movement of the latter and said border wires which causes noise. The high degree of, resiliency of said wires also causes them to break at the corners. of the struc- 5 ture and project through the cover fabrics. Such breakages have caused injuries to- occupants of seat cushions and, in many instances, the break ages have occurred in the handling and shipment 10 10 tures therefor after said structures ,have been of the spring assemblies. surrounded by suitable padding material of a 1 It is also well known that all metal spring fullness which necessitates crowding of the same assemblies have a tendency to buckle and become and said padding into said cover structures, distorted in forcing them, when covered with Another essential object of the invention is to padding, into cushion and mattress covers and 15 provide a reinforced structure of the type speci?ed .that in the use and handling of mattresses and 15 which will resist distortionand breakage iniuse, cushions equipped with such spring assemblies, such distortion and breakage in use being common the corner portions su?er most'from breakage to structures of this type as ordinarily manu and distortion. The highly resilient border wires 2 will not factured. , _. 20 Another object of ‘the invention is to provide bend like softer wire under the in?uende of 20 a, reinforced structure of the type speci?ed which stresses to which they are subjected in the tying can be rolled up or folded and at, the same time operations and because of their smooth surfaces andv tendency to straighten themselves, they slip Another importantobject of the invention is along the ties under stresses of use, handling and 25 to provide a spring assembly of the type speci?ed, shipment, and thus in time, if ‘not shortly after 25 wherein the chance of breakage of highly resilient completion of the spring, assembly, present loose border;wires atthe corners of the assembly and .ends that soon project through the cover fabrics. consequent danger of injury to occupants and Such wires are advantageous, however, because of their high degree of resiliency whereby, when users of seat cushions and mattresses, is elimi secured to the springs I, they exert a constant 30 ‘ compressed to occupy minimum ‘space in shipping. Suitable embodiments of the invention are 11 lustrated in the accompanying drawing, wherein Fig. 1 is a fragmentary plan view of a spring assembly constructed in accordance with the 35 invention. ‘ Figs. 2 and 3 are fragmentary detail sectional views of the same taken on the lines 72-2 and 3—3, respectively of Fig. 1. Fig. 4 is a fragmentary perspective view show 4,, ing a corner portion of another form of embodi ment of the invention. ' The upholstery springs I shown are coupled with each other in any suitable manner as,’ for example in accordance with the teachings of the 45 Re-Issue Patent No. 19,347 to Oliver Hetherington, as illustrated inthe accompanying drawing.v Preferably, the outermost portions of the mar ginal springs are secured by means of suitable ties of the said Hetherington patent type, or any other 50 suitable type, to border wires 2 composed of sever al strands of piano wire or other wire of a highly resilient nature. ‘ In practice it has been found difficult to bow said wires around the outermost portions of the 55 corner springs l and secure said bowed or arcuate tension on the whole structure which tends to expand the same laterally and longitudinally to increase the aforesaid resistance to buckling and aid in self-restoration of the structure after such buckling has occurred. This effect is produced 35 particularly along the rows of marginal springs and is very desirable. ' Hence, a suitable means for retaining the ad vantages incident to the bowing of the border wires 2 about the corners of the spring assembly 40 while eliminating the dangers incident to the breakages or escapes from the ties of these corner portions of said‘wires has been sought for some time. The present invention, as embodied in the struc- 45 tures illustrated herein, remedies the foregoing di?lculties and disadvantages by omitting the corner portions of the wires 2 which, as shown in Fig. 1, terminate at points spaced from the corner springs 3 and just beyond the outermost portions 50 of the next adjacent springs, said wires being se cured by the ties shown or others commonly used in the art to all springs except the corner springs 3 and the next adjacent marginal springs. Strips 4 of sheet metal of light gauge and 55 2 2,105,115 which are folded to U-shape in cross section are bent between their ends to the curvature coin ciding with that of the terminal coils of the corner springs and receive the outermost portions of the latter while the arms of said strips re ceive the terminal end portions of the border wires 2 and the adjacent portions of the springs l lying next to the said springs 3 and to which the wires 2 are practically tangential. ‘ The 10 ?anges of the said channeled strip 4 are con tracted to ?rmly engage the corner springs '3 and the adjacent springs l, the mouth portions of the strips 4 being closed or practically closed at the portions 5 and 8, respectively, as shown in Figs. 2 and 3, to clamp the terminal end por tions of the wires 2 against movement relatively to the springs l and said strips 4. In effecting such closure by means such’ as a punch-press equipped with the requisite dies, the several wires embraced by said strips 4 may be slightly ?at tened but such ?attening is not necessary. The engagement of the strips 4 with the sev eral wires 2 and springs l and 3 is such as to obviate movement of said strip and said wires 2 relatively to each other longitudinally of said wires. Said strips 4 are also anchored to the springs l and 3 and cooperate with the wires to prevent the marginal springs l and said springs 3 from being crowded toward each other in direc 530 tions parallel with said wires 2 and thus render the marginal portion of the spring assembly ex tremely resistant to the lateral pressures with out reducing the resiliency of the whole struc ture responsively toloads‘ on the springs. 35 Said members ‘I are contracted similarly to the‘ strips 4 to anchor the same to the springs l and 3 and to engage border wire members 8 which, in this instance, are made up of elongated ter minal portions of the vertical marginal zig-zag wire springs 9, said terminal end portions 8 of each spring 9 being looped about a next suc ceeding portion 8 of the adjacent spring 9 by means of loops ID. The said members ‘I will ?ex to enable spring assemblies equipped therewith to be rolled up into small diameter rolls for cylindrical baling purposes and will con?ne several ends of wire portions 8 against projecting appreciably out wardly from points of breakage so that such pro jecting ends may not penetrate the cover fabrics. The structure of Figs. 1 to 3 inclusive con stitutes the preferred form of embodiment of the invention, it being obvious that the springs 9 may be incorporated into said structure if de sired. I claim as my invention: A spring assembly for upholstery comprising a group of interconnected springs disposed in rela tive positions to form a rectangular structure, 25 channeled L-shaped sheet metal corner members, each secured to and embracing the outermost portion of the terminal coil of a corner spring and the outermost portions of the terminal coils of the two marginal springs next adjacent the 30 respective corner springs, resilient wires pro jecting at their ends into the arms of said corner members and in tangential relation to the ter minal coils of the last-named marginal springs The characteristics imparted to the marginal portions of the structure necessarily affects all of the remaining springs l to render the whole and secured to the latter by said corner members, " said border wires being secured to the outermost portions of the terminal coils of the remaining structure far more resistant to buckling than marginal springs and rendering yielding the edge portions of the assembly disposed between the portions embraced by said corner members by flexing of said last-named portions of said bor der wires and said corner members being sub stantially in?exible and causing load disposed it would be otherwise. ‘ Substantially the same result as is obtained by the'structure of Figs. 1, 2 and 3 may be ob tained by the structure of Fig. 4 wherein the corner reinforcing member 1 composed’ of re silient zig-zag wire strips folded along its middle portion to provide skeleton channel structures may be ?exed to substantially L-shaped contour shown, instead of being bent to such contour. upon any one or several springs embraced there by to be transmitted to all of the said springs i : to which said members are secured. WILLIAM W. GLEASON.