US117860A - Improvement in devices for forming spiral bed-springs - Google Patents

Description

UNITED STATES PATENT QEEICE.

EDWIN L BUSHNELL, 0F POUGHKEEPSIE, NEW YORK.

IMPROVEMENT IN DEVICES FOR FORMING SPIRAL BED-SPRINGS.

To all whom Iit may concern:

Be it known that I, EDWIN L. BUSHNELL, of Poughkeepsie, in the county of Dutchess and State of New York, have invented certain Improvements in Devices for Forming Spiral Bed- Springs, of which the following is a specilication, reference being had to the accompanying draw- 111g.

My invention relates to devices to be used for forming the spiral springs for mattresses, cushions, sofas, Ste., for which Letters Patent were 'granted to me October 19, 1869, No. 95,984, and

reissued August 22, 1870, No. 4,103; and the devices consist, first, in a machine for -formin g the eyes or loops on the ends of the spring; and, second, in a clamp for holding the spring while the end of the wire is being fastened, so as to bring all the loops at the same distance apart.

Figure 1 is a top-plan view of the machine for forming the loops.. Fig. 2 is avertical section through the same on the line w a' of Fig. 1. Fig. 3 is a vertical section of the same on the line y y. Fig. 4 is a view of one end of a wire, with the four eyes formed therein, before it is coiled into shape, Fig. 5, a top view of the spring completed; Figs. and 7, respectively, a side and a top-plan view of the clamp for holding the spring while securing the end; and Fig. 8, a view of another device for forming open loops in the springs instead of the closed eyes, Fig. 9, an end view of the clamp for holding the springs.

The springs constructed on my plan are provided on each end with four eyes or loops to receive the cords or clasps for holding them in position, the loops being formed by bending the last or end coil at the proper points. The purpose of my first device is to form these loops of a uniform size and shape and at the proper distances apart.

In constructing the machine I first provide a flat bed or table, A, and mount it upon legs and secure to its top near one end an upright stud, a, ofthe form of the inside of the desired eye or loop. Under the table I pivot an elbow lever, B, having one end turned up through a slot in the table by the side of stud a., as shown in Figs. 1 and 2. I also pivot in hangers d, secured to the under side of the table, an upright lever, G, the lower end of which is provided with an arm or stirrup, c, so that it can be operated by the foot. The upper end of the lever C passes up through a slot in lever B and another in the table, and it is provided with a transverse pin, c, which bears against inclined notches j' cut in the under side of the horizontal arm of lever B, as shown in Fig. 2. Vhen the lower end of lever C is shoved back the pin e, working under the inclines j', raises the back end of the lever B and forces its upright arm against the stud c so as to hold the wire firmly in pla-ce when inserted between them. On the table I mount upon the same pivot g two swinging jaws or dogs, E, each connected, by a link, t, with the upper end of lever C, as shown in Figs. l and 2, so as to be operated thereby. When the lower end of lever C is drawn forward, as shown in Fig. 2, the forward ends of the jaws are opened so as to be back of the stud a and the end of arm B is back from the stud. As the lower end of the lever O is forced back the arm B has its end f'orced against the stud and the jaws E have their front ends carried around on opposite sides of the stud, which is thus encircled by the jaws. On the table, in front of the stud a., I secure a curved plate, G, provided with shoulders or notches to support the wire and hold it in position while having the loops bent in it. I also secure to the table by a screw a slotted plate or gauge, L, having an upright pin or stud, l. When the loops are to be formed in the wire, previous to coiling it, it is laid across the ends of plate G between the stud a and the upright end of arm B, and then the lower end of lever G pushed back with the foot. lhen this is done the arm B clamps the wire against the stud a and the ends of the jaws bend tightly around the stud. Upon drawing forward the lever and removing the Wire the latter will be found to have a'perfeet loop or eye formed in it. After forming the first eye the wire is drawn forward and the eye hooked onto the pin of gauge L, and then the lever forced back so as to form a second loop, and so on repeatedly until all four loops are formed. In this manner the eyes or loops are formed at equal distances apart, the distance being regulated by adjusting the gauge L nearer to or further from the stud a. It is obvious that the wire may be coiled int-o a spring and the loops formed afterward, but it is not considered desirable so to do. Each end of the wire of which the spring is formed I secure by bending or twisting it tightly around the end of the next or second coil, as shown in Fig. 5,

this being the common manner of fastening them in all this class of springs. If the end is not ,secured at exactly the proper point the first and the last of the four loops will not be at the proper distance apart. I therefore provide a device for holding said eyes in position While the end of the wire is being fastened. The contrivance, as illustrated in Figs. '6, 7, and 9, lconsists of a vise or clamp, O, one of the jaws of which is provided with a bar, s, extending above and below the i jaw, as shown, the two ends of the bar being bent forward, and being at the same distance apart as that required between the loops or eyes.

In using the device the first of the four eyes is slipped onto one end ofthe bar and the last eye onto the other end, and then the vise is closed so as to hold the end and the second coil of the wire, as shown in Fig. 9. In this manner the two eyes are held at the proper distance apart, and the end and the second coil held together, so that, by the use of a suitableinstrument, thew end may be wound fast. When open instead of close loops' are to be formed in the wire, a device such as shown in Fig. 8 may be used instead of the machine previously described. rlhis last device consists of a lever, T, pivoted so as to close down between two side blocks or cheeks, U, the wire being' laid across the two blocks and then the lever turned down so as to bend the wire down between the blocks. The lever is provided on top with a plate, w, to prevent the wire from bending or curling up.

If desired, this device may be mounted in an upright position on a table, the lever T being extended down through the same, so that it can be operated by the foot.

Having thus described my invention, what I claim isl. The combination of the stud c, clamp B, and jaws E, with the mechanism to operate said clamp and jaws, constructed and arranged to operate substantially as described.

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