US1819281A - Spring - Google Patents

Description

Aug. 18, 1931. B. R. DEXTER 1,819,281'

SPRING Filed Nov. 9, 1925 Patented Aug. 18, 193 r UNITED STATES BENJAMIN It. LDEIX'ILIEEZR, F OAKLAND, CALIFORNIA SPRING Application filed November likely to get out of order, and is well adapted to perform the services required of it. While my improved spring may be formed in any suitable manner and of any suitable material, yet it is preferable to form the same of light but strong sheet metal resilient material, on account of the cheapness of the leather.

Other objects and advantages of the invention, not at this time more particularly enumerated, will become readily apparent as the following detailed description is pursued.

A preferred embodiment of the invention and a slightly modified form of the same is shown in the accompanying drawings in which Figure 1 is a diagrammatic view showing how the preferred form of my invention is constructed;

Figure 2 is a view similar to Figure 1 showing the spring in the second step employed in manufacturing the same;

Figure 3 is a diagrammatic view showing the first step in manufacturing a modified form of my invention;

Figure 4 is a diagrammatic view showing the second step used in manufacturing this modified form of invention;

Figure 5 is a side view of the preferred form of my invention; and

Figure 6 is a sectional view taken thru a spring constructed in accordance with the modification shown in Figures 3 and 1.

In the above mentioned drawings, like reference characters designate like parts thruout, and referring particularly to Figures 1, 2, and 5, the spring may be made 9, 1925. Serial No. 67,716.

of a single strand or strip of metal 10, folded as at 11 to provide arms 12 and 13 respectively. Each arm 12 and 13 is folded laterally over each other alternately. As

shown in Figure'2, the arm 12 has been folded over the arm 13. The next step will be to fold the arm 13 laterally over the arm 12 until a built up springconstruction is formed. It will be seen that the arm 12 is folded from back to front and front to back, while the arm 13 is folded from side to side in between the folding of the arm 12. The completed spring is shown inFigure 5.

In. the modified form of" the invention, shown in Figures 3, 4, and 6, a pair of sheet metal strips 17 and 18 are placed upon each other as shown in Figure 3. The strip 18 is bent upon itself as-at 18, and the strip 17 is folded over the strip 18 to perform the first step in manufacturing the spring,

as shown in Fig, 4. The strip 18 is then folded over the strip 17 from front to rear, and the strip 17 is then folded over the strip 18 from side to side. This operation is continued alternately until a built up spring construction is formed. The completed spring construction is clearly shown in Figure 6 which is a sectional view.

The above mentioned parts are believed to adequately define my invention. The spring thus formed and shown in Figures 5 and 6 in assembled position is easily made and possesses a considerable inherent degree of resiliency. The springs may be constructed with sharp edges as shown in Figure 5 or with rounded edges as shown in Figure 6, these details in manufacture being unimportant. Other like changes may be resorted to without departing from the spirit of the invention, and thus only inso-' far as I have particularly pointed out my invention in the following claims do I desire to be limited. The springs formed in carrying out my invention are adapted for a number of uses. They are particular ly valuable for a cushion spring for automobiles and under small jolts, the spring functions by the resiliency of the metal for it is highly compressed. The cross-woven strips contact and bring frictional resistance;

into play, thereby limiting the amount of compression. Also, on the rebound, the spring would extend beyond its normal position, bringing the metal strips again into close frictional contact, and thus limiting the amount of rebound. It will be then seen that this type of spring relies on the resiliency of the metal for small amounts of movement within limits and on higher compression or extensions, the frictional resistance of the contacting strips is brought into play. .c

Having described my invention, what I claim is i lhA spring comprising a continuous strip of resilient metal, said strip being bent diagonally intermediate its length,ithe extending lengths of said strip being transversely interwoven one relative to the other. 2. A spring comprising a continuous strip of resilient material, a diagonal bend intermediate its length providing a reenforcing and tie member at one end of the spring, the angnlarly projecting lengths of said strip being transversely interwoven one relative to the other.

3. A spring comprising a continuous i stripof resilient metal provided with a full diagonal. bend adjacent the longitudinal center providing a tie and reenforcing means, the extending lengths being transversely interwoven one relative to the other and in spaced relation. H

In testimony whereof I afiix my signature'.

BENJAMIN n. DEXTER.

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