US75266A - Edward heaton - Google Patents

Description

l E. 'HEATON SHANK SPRING.

1\Io.'75,266.` Patented Mau.l l0, 1868.

@uitrit tsrtzs @sind @Hirn EDWARD HEATON, OI"l NEW HAVEN, CONNECTICUT` Letters Patent No. 75,266, dated March 10, 1868,.

v IMPROVEMENT IN SHANK-SPRIN GS.

T0 ALL WHOM IT MAY CONCERN: l

Be it known that I, EDWARD HEATO'N, ofNew Haven, in the county of New Haven, und State of Connec# tient, have invented n new Improvenient in Shank-Springs for boots and shoes and I do hereby declare the following, when token in connection with the accompanying drawings and the letters ofreference marked thereon, to be a. full, clear, and exact description of the same, and which said drawings constitute part o f this specifica tion, and represent, in- I Figure I, a single shank,

Figure 2 the manner of cutting, and 1n v Figure 3 a diagram, illustrating the position of the spring in the shank of the boot or shoe.

This invention relates to an `improvement'. in steel springs, such as are inserted in boots and shoes, and-the invention consists in the manner ot' cutting the Shanks from sheet met-al, so that no portonof the metal is wasted.

'.lo enable others to construct -my improvement, I will proceed -to describe the same as illustrated lin the accompanying drawing/ss i It is necessary to give to the springs a curve, correspondingl to the shape of the foot, and consequently the reverse for right 'or left boots or shoes, as seen in fig. 3, the spring A being for a right boot, and B for a left, the point a being the same in bot-h right Vand left. Heretoforc this curve has beengiven by'cuttng thel spring of different widths at dilerent points inthe spring, which necessitntes no inconsidera-hle waste of metal. To avoid this waste, and yet obtain the curve required, I form the spring as seen in iig. 1, the one edge being of reverse form precisely as the other, so that one edge of one spring corresponds exactly to the opposite edge of another spring; that is to say, from a sheet of metal the springs are cut, as seen in g. 2, and this may be done by a shear, having its edge to correspond-to the edge of the springs, and the metal fed into the shears. The springs are successively cut from the sheet without any waste of metal, which saves a. large-expense in the cost ofthe dies, as cach dil'erent-sizedl spring, as heretofore formed, required a dieof precisely that size and form.

Having thus fully described my invention, what I claim as newnnduseful, and desire to secure by Letters Patent, is-

The construction of shank-springs, when eut or stamped out of the. sheet without scrap or waste, substantially as s'pecied. i

EDWARD HEATON.

Witnesses:

A. J.'T1BBITs, J. H. SHUMWAY,

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