US2851087A

US2851087A - Auxiliary furniture spring

Info

Publication number: US2851087A
Authority: US
Publication date: 1958-09-09
Anticipated expiration: 1975-09-09

Description

Sept. 9,1958 E. G. KRAKAUER 2,851,037

AUXILIARY FURNITURE SPRING Filed May 31, 1956 IN VEN TOR.

23 I Edwin 6'. Krakauer BY 1Q a TTORNEY v 2,851,081 Patented Sept. 9, 1958 2,851,087 AUXILIARY FURNITURE SPRING Edwin G. Krakauer, Roslyn Heights, N. Y., assignor to Kay Manufacturing Corporation, Brooklyn, N. Y., a corporation of New York Application May 31, 1956, Serial No. 588,358

4 Claims. (Cl. 155-179) This invention relates to spring constructions in upholstered furniture and particularly to the auxiliary springs used to improve the spring action at the end portions of the main springs in cases where such main springs are of sinuous form and extend across the frame for the spring structure.

The invention contemplates the provision of an auxiliary spring of generally rectangular or O-shaped outline and made of a single length of wire, provided with bends at the rear end portion thereof whereby the auxiliary spring may readily be hooked as an individual unit about the sinuous spring independently of the other springs, the auxiliary spring being provided with a pair of attaching elements at the front end portion thereof whereby it may be attached to any point of a border wire, the spring also having an opening between its sides for the passage of a clip to secure it to the side portion of a border wire and thereby to adapt the same spring for use at the corner of the spring structure and obviating the need for special auxiliary springs at the corners.

The invention further contemplates the provision of O-shaped or generally rectangular outline.

spring unit being secured to the side portion 14 of the border wire by a suitable clip as 15. The unit 17 may be readily disali-gned with its sinuous spring 10 to bring the front part thereof close to the border wire 14 as shown in Fig. 1.

As shown, the auxiliary spring unit is made of wire in The

side edge portions

20, 21 are preferably straight and parallel but may diverge forwardly should it be desired to employ a clip wider than the sheet metal clip 22 shown to secure the front edge portions of the unit to the border wire 12. At the rear end of the unit, the

side edge portions

20, 21 are integrally joined by the cross bar 23 which closes said rear end and stiifens the unit and permits it to be made of a single length of wire. At the front end thereof, a pair of similar attaching

elements

24, 25 are provided on the unit, said elements closing the front end portion of. and

also stiffening the unit. A substantially right angle bond 26 joins the element 24 to the side portion 20 While a similar bend 27 joins the other element 25 to the other side portion 21. Each element terminates in a short substantially straight free end portion as 28 for the

element

24 and 29 for the element 25, said

end portions

28 and 29 being joined to the remainder of the element by a substantially right angle bend as 30 and 31 respectively.

The elements extend from the respective side edge portions an auxiliary spring for use in connection with sinuous springs and a border wire, the auxiliary spring being formed with elements permitting the attachment thereof to the front portion of the border wire or to the side portion of said Wire or to both front and side portions of said wire independently of similar adjacent auxiliary and sinuous springs.

The various objects of the invention will be clear from the following description and from the drawings, in which Fig. 1 is a fragmentary top plan view of the corner part of a spring seat or back showing one auxiliary spring at the corner and another adjacent thereto.

Fig. 2 is a side elevational view thereof partly in vertical section.

Fig. 3 is a rear elevational view thereof.

Fig. 4 is a perspective view of the auxiliary spring.

In general, the auxiliary spring as is customary, supplements the various bowed and spaced apart sinuous springs as 10, 11 and the like stretching from front to back across the usual frame, not shown, for the seat or back of a piece of upholstered furniture. The usual border wire 12 is arranged above the front end of the sinuous springs and passes around tothe side of the spring structure. An individual auxiliary spring unit is provided for each sinuous spring and is independent of the other sinuous springs, but is connected at the front to the same border wire as the other auxiliary springs. The rear end of each auxiliary spring is provided with spaced apart bends which are alternately concave and convex and thereby adapted to hold said rear end to its sinuous spring, especially when the front end of the spring is pre-stressed by depressing and tying the border wire down closer to th frame than it would normally be. 1

By the use of an individual unit for each sinous spring, the special corner structure heretofore necessary is avoided, and the same type of auxiliary spring is employed both at the corners and elsewhere in the spring construction, the

of the unit transversely toward each other and preferably do not extend outside of the rectangular outline or outside of the

sides

20, 21.

One element as 24 is arranged preferably vertically above the other with the border wire 12 on top and above the element 25. The clip 22 holds the parts in the positions described and is long enough to extend as closely as possible at both ends thereof to the

bends

30 and 31. The

free end portions

28, 29 and the

bends

30, 31 cooperate to prevent material rotation of the auxiliary spring unit on the border wire, being in the path thereof or interfering with each other should such turning as would cause objectionable noises, tend to occur under the stresses of normal use. The

portions

28 and 29 also serve to prevent the

sides

20, 21 from spreading apart under stress and ultimately being drawn out of the clip 22.

As shown, the bends in the rear portion of the auxiliary spring unit 17 are three in number for each of the

side portions

20 and 21. The cross bar 23 is arranged transversely across and rigidly joins the

side portions

20 and 21 through the intermediary of the

bends

36, 32a and 45, the straight portion 33a integrally joining the

bends

32a and 45 and being coplanar therewith. The bend 36 is coplanar with the bar 23 and lies in a plane substantially perpendicular to the plane of the bends 32a and cause of the large angle subtended by the bend 45, the por-

' tions

23, 32a and 33a are brought below the side edge portions of the unit 17. The unit 17 is consequently engaged with or hooked to the sinuous spring by arranging the cross bar 38 of the latter at the bend 45 and further arranging the bend 32a at and above the cross bar 39.

While certain specific forms of the invention have herein been shown and described, various obvious changes may be made therein without departing from the spirit of the invention defined in the appended claims.

I claim:

1. In a spring construction, a frame, a border Wire in spaced relation to the frame, a sinuous spring bridging the frame, an auxiliary spring of generally O-shaped outline for and confined to the sinuous spring, the auxiliary spring having a continuous bent rear end portion. adapted to be hooked to and thereby rigidly connected.

solely by said end portion to the sinuous spring, said auxiliary spring being of a single shaped length of wire having a pair of transversely spaced apart sides and a pair of similar front end elements each integrally joined by a bend to one of the sides and each extending toward the other element and a free rearwardly extending portion at the end of each element similar, parallel to and of substantially the same length as the tree portion of the other element, the overall width of both elements being substantially that of the auxiliary spring, the auxiliary spring being clipless and jointless and having an integral cross bar at the rear end thereof and a plurality of bends between the cross bar and the sides, said elements overlapping to form a closed frontend on the auxiliary spring and a rigid connection between the elements and the border wire comprising a clip passed thereabout between the bends of the elements to secure the elements to and against rotation on the border wire.

2. In a spring construction, a series of transversely spaced apart sinuous springs, a border wire, and an individual clipless and jointless one piece wire auxiliary spring between the border wire and each sinuous spring, each auxiliary spring being independent of the other auxiliary and other sinuous springs, said auxiliary spring being generally O-shaped and having a front end portion, a rear end portion and straight sides integrally joining said portions, the front end portion comprising a pair of L-sha-ped members each extending transversely and integrally from one side toward the other side of the auxiliary spring, the transverse leg of each Lshaped member being in overlapping ccntact with the corresponding leg of the other member and being substantially perpendicular to said sides, the other leg of each member being free and constituting one of the ends of said one piece spring and being directed rearwardly and substantially parallel to said other side of the auxiliary spring, a clip between the free legs of the members and passing around both of the first mentioned legs and the border wire and securing said legs to said wire and thereby preventing relative rotary movement of the members and the border wire, the free legs being arranged adjacent the respective ends of the clips and preventing relative transverse movement of the sides and the clip, the rear end portion of the auxiliary spring comprising a first bend at the rear end of each of the sides and concave forwardly and subtending an angle somewhat less than 180 and coplanar with the side from which said first bend extends, a straight portion extending forwardly from said first bend substantially parallel to the side, a

second bend concave downwardly and coplanar with the first bend and the side and subtending an angle of approximately 90 and at the forward end of said straight portion, a third bend subtending approximately 90 extending transversely of the second bend and arranged in a plane substantially perpendicular to the plane of the first and second bends, and a transverse cross bar integrally connecting corresponding third bends at the rear ends of the respective sides.

3 An auxiliary spring for the front end portion of a single sinuous furniture spring, and constituting a single shaped length of wire, and being a unit independent, when installed in a spring structure, of similar units and independent of. .the springs of said structure other than the aforesaid single spring, said unit having a pair of transversely spaced apart similar sides, a front end portion on each side comprising an L-shaped member having a leg extending integrally from the front end of one side toward the other side and having a second leg parallel to and adjacent said other side, a rear end portion on each side comprising a first bend concave forwardly and subtending an angle slightly less than 180, a straight portion extending forwardly from and integral at one end with the first bend, a second bend concave downwardly and extending from the other end of the straight portion and coplanar with the first bend and the straight portion, a third bend extending toward the other side and in a plane substantially perpendicular to the plane of the first and second bends, and a transverse bar integrally and rigidly connecting the third bends of the respective sides, the first and second bends constituting the sole means for connecting the auxiliary spring tosaid single spring.

4. The auxiliary spring of claim 3, the second bend subtending approximately 90 and the L-shaped front members being maintained by the cross bar and said sides in permanent overlapping relation and being prevented from rotating within a clip when clipped to a border wire of said spring structure, to form a rigid connection thereto.

References Cited in the file of this patent UNITED STATES PATENTS 1,295,287 Falls Feb. 25, 1919 2,392,254 Mayer Jan. 1, 1946 2,439,789 Bank Apr. 20, 1948 2,657,740 Daniels Nov. 3, 1953 FOREIGN PATENTS 1,103,311 France May 18, 1955