US2096767A - Bedspring - Google Patents

Description

Oct. 26, 1937. H. B. sKLAR 2,096,767

BEDSPRING Filed Feb. 14, 1934 2 sheets-sheet i Hfs. sKLAR Oct. 26, 1937.

BEDSPRING Filed Feb. 14, 1934 ZSheets-Sheet 2 ywwm Patented Oct. 26, 1937 1E STATES PATENT* 4 Claims.

My invention is a continuation in part :as a division of my patent application `Serial No. 675,896, led June 15, 1933, for a Crimping ma chine for bed springs, or the like.

An object of my invention is to kform a bed spring or the likewith a border wire having a continuous groove and to secure the upper wire of coiled springs adjacent the border wire to such border wire by fitting the upper turn of the coiled spring Vin the groove of the border wire and then crimping the border wire to close the outer portion of the wire around the wire of the spring, thus retaining the wire of the spring in the groove of the border wire.

One of the objects of my invention is to assemble the coiled springs and a border wire with a horizontal groove by inserting a portion of the upper loop of the coiled springs in the horizontal groove and then crimping the lips of the border wire at the groove to firmly attach the springs and the border wire. This crimping may be effectively done by a machine such as disclosed in my patent application Serial No. 675,896 in which the crimping dies have a rectilinear motion in opposite directions Vand the portion engaging the lips of the border wire on opposite sides of the groove are beveled. Thus in the action of crimping, the lips ci the border wire are subjected to a cold forging and upsetting operation. This bends theL lips inwardly toward each other and the displacement of the metal of the border wire forces the inserted part of the loop to have a snug t against the base of the groove and thus toward the axial center of the border wire. The procedure of upsetting and crimping the lips forms iiattened surfaces on the outside of the border wire, these surfaces therefore forming planes, which planes are at an angle to a plane through the center of the border wire and the axial center of the inserted portion of the loop.

Another object and feature oi my invention is to form the border with a vertical grooverwhich is preferably continuous and extends upwardly from the lower side of the border Wire. In this construction, the upper coil of the coiled spring has an upwardly bent section or hump which fits in the vertical groove of `the border wire adjacent the groove then being crimped or bent over the upwardly bent section of the spring. vThis crimping is prefere. ly of such a manner as to firmly secure the border wire and the coiled spring, as with this construction, there is less danger oi the'crystallizing of the spring. The upwardly bent section of the spring may be formed on an'upward curve, or it may have an offset section with substantially short vertical arms.

The hump in the loop of the coiled spring may be effectively made by the apparatus disclosed in my pending application, Serial No. 5,226, for Automatic groove cutter and crimper for bed spring assembly; filed February 6,' 1935. However, other types of machines or procedures may be used to form upwardly projecting humps in the upper loop of the springs, such humps either having a gradualcurve or substantially vertical ends with a connecting section between such ends. The crimping of the lips of the border wire on opposite sides of the vertical groove may be done by crimping dies, such as disclosed in my patent application, Serial No. 675,896 above mentioned, the dies being positioned to operate, however, in a horizontal line instead of a vertical line, as shown in such patent application.

Another feature relates to forming the vertical offset portion of the spring in a straight line, that is, occupying a verticalplane in order to properly fit in the straight portions of the continuous groove, but where the coiled spring engages a curved corner of the border wire, the vertical offset portion of the spring must be made on a curve toi conform to the curved corner ofthe border wire.

I prefer to crimp the lips on opposite sides of the vertical groove of the border wire by combined upsetting and cold forging operation such as disclosed in my patent application Serial. No. 675,896 above mentioned, in which the inward pressing of the lips of the border wiregives a displacement of the lips of the border and such displacement engaging the hump of the loop forces the humpV snugly into the base of the vertical groove toward the axial center of the border wire. The outside surface of the lips is preferably ilattened, each flattened surface forming a plane and these planes being at an angle to the vertical plane through the lasis of the groove and the axis of the inserted portion of the hump o-f the loop.V

My invention is illustrated in connection with the accompanying drawings in which Fig. l is a plan taken in the direction of the arrow l of Fig. 2 of a portion of a bed spring, the lower angle iron being omitted.

Fig. 2 may be considered a Vertical section on the line 2 2 of Fig. l in the direction of the arrows, the coil springs being illustrated in elevation.

Fig. 3 is an enlarged perspective view of a section Qi' the border wire.

Y Fig. 4 is a view similar to Fig. 3 with the hump on the Vcoil inserted in the vertical groove of the border wire.Y

Fig. 5 is a view similar to Fig. 4 showing the border wire crimped to secure the coil sprin Yand the border wire.

Fig. 6 is a partial perspective View of the upper turn of a coil springshowing a.- curved type of hump for inserting in the vertical'groove of the VborderY wire.

Fig. 7 is a view similar to 8 showing another type of oiIset hump on the coil spring.

Fig. 8 is a plan taken in theY direction of the` arrow 8-of Fig. 9 of another form of attaching Fig. 10 is a perspective View of a section-of the borderwire showing the groove in alhorizontal" plane. K. A Y

Fig. 11 is a View similar to Fig. V10 illustrating a portion of the upper turn of the coil springfitted in a continuous longitudinal groove.

Fig. 12 is a. view similar to Fig. 11 showingfhVA border wire crimped and forminga hinged atv ltachment ofthe borderY wire and the coil of the spring. ,Y

Referring rst Vto the construction of Figs. 8 through 12',A a section of a bed spring isindicated by the numeral II, and the border wire bythe numeral I2. A lower angle iron'I3 holds the supporting bars I4 from wlu'ch there'are upwardly extending coil springs I5, which -springs are usually a combination of spiral and helical coils.

In my invention, the border Wire has a longitudinal groove I6 extending therfull length of the wire. This has an inner cylindrical section I'I suflicient to accommodate the curvature of the upper turn I8 of the springs located adjacent the border wire. The upper turn I8 is substan-- tially circular, and only av small section of the arc extends into the groove I6. The grooveis illustrated as being in a horizontal plane. In assembling, the upper turn of the coil spring ts intofthe continuous groove'as shown-in Figs. 8V

and 11,and portions Voffthe border -wire are crimped as `indicated atVV I9 to 'attach the coil spring to the border wire. Crimping may be doneV by the machine illustrated in my patent'4 application Serial No. 675,896 above'mentioned,

or any other suitable type of crimping, or pressing the crimped ends 20 of sections 0i the Yborder Y wire suiciently close together to hold the upper turn of the Vspring in the groove I6. .Y When in forming the 'construction of'Figs. 8 through l2 I employ a. crimpingmechanismsuch as disclosed in my application Serial No.'675,896

surfaces on the borderwire at each ofthe lips,

I6, that is; toward the axial center ofthe borderY Wire, so that the portion of the loop of the spring occupies a central position, as indicated at '.23 in,`

Fig; 512. This type of crimping forms Vflattened these ilattened surfaces being in planes whichV form an angle Vrelative oneV to the other and 1130 '--in order to iltV in the groove. ris then crimped asindicated `at 36, the points or fingers of v,the crimp Y31 may be pressed either 'close together or in close contact with the Awire of the hump to attach the coil'spring in a rigid'V the plane through the axis of the border Wire and the inserted section of the loop.

VIn the construction of Figs. 1 through 7, theV general form of the spring is thesame as above described. However,v in this arrangement, the border wire 30 has a continuous longitudinal groove 3| extending vertically upwardly from the lower side of the wire. 'I'his groove preferably has a rounded upper end 32 formed-to theV curvature of the wire 33 of the upper loop of a.

coiled spring 34. In one formillustrated in Fig. 6, .a hump 35 is made in this upper turn, this hump `extending upwardly,` and where` it engages in the longitudinal groove, the wire on the hump portion and adjacent thereto is in a vertical plane relationY to the border wire.

In the construction of Fig. '7, the hump 38: is formed with Vertical end pieces 39and a connecting strip 40. These all being in a vertical plane to fit in a straight groove, the border Wire being crimped'as shown'in Fig. 5, with a tight crimp to form a rigid connection. Itis manifest that both Y The border wire the constructions of Figs. 6 and '7 may .be made l p eating dies should operate inja. horizontal line.

The groove of the border wire may be in depth substantially equal to the height the humpv is upset above Vthe plane of the upper loop of the spring. The-action of crimping the lips of the border Wire causes a type of upsetting action, the metal of the lips being displaced toward each other and operating to force the upper point Vof a hump,

such as 35 of Fig. 6 or the connecting strip 40 of Fig. '7, snugly against .the upper rounded end 3,2 of the groove 3l. In cases wherevthe offset of the hump from the plane of the loop ofthe spring is substantially equal to the depth of the groove in the border wire the hump isrsubstantially disposed within the .groove as shown in Fig. 5. The type of preferred crimp has attened surfaces,

these being at an angle to each other and meeting in ai line substantiallyrin Va vertical plane through the axis of the border wire and the sec- Ytion of the loop enclosed in the groove.

' 1. In a bed spring'construction, a. rod formed*Y with a downwardly opening groove, a spiral spring formed with an offset portion in the top convolution thereof disposed substantially entirely within the groove and jsecured by crimping of theV material of the rod adjacent the groove about the offset portion.V

2. In a bed spring construction, a metalrod formed with a downwardly opening groove, a spring having a top convolution with an upwardly offset portion forming a hump, the hump having opposite end portions making `an abrupt angle with the remainder of the top convolution and a connecting portion substantially parallel to the base of the groove, the offset hump being substantially entirely disposed Within the groove and secured by crimping of the material of the rod adjacent the groove inwardly, the end portions of the hump being at opposite ends of the crimp.

3. In a bed spring construction, a rod formed with a downwardly opening .groove and a spiral spring formed with an offset portion in the top convolution thereof, secured within the groove wherein the offset portion is substantially equal in height to the depth of the groove, whereby portions of the rod rest upon the top convolution of the spring adjacent the offset portion thereof.

4. In a bed spring construction, a rod formed with a downwardly opening groove and a spiral spring formed with an oiset portion in the top convolution thereof, disposed within the groove and secured by crimping of the material of the rod adjacent the groove about the offset portion wherein the oset portion is substantially equal in height to the depth of the groove, whereby portions of the rod rest upon portions of the spring adjacent the offset portion. Y

HARRY B. SKLA

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