USRE6828E - Improvement in machines fofi making wooden shanks for boots and shoes - Google Patents

Description

, ,W. N! SPRAGUE. MACHINE FOR MAKING WD'QDEN SHARKS FOR BOOTS AND SHOES.

'Re issued Dec. 28, 1875.

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ASSIGNMENTS, TO HfiddELF AND W'M. W. POTTERgfDF BOSTON, MASS.

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Specification forming part of Letters Patent No. 157,424, dated December 1, 1874 reissue No. 6,838., dated.

December 28, 1875; application filed November 16, 1875.

' To all whom it mag concern:-

Be it known that I, WATSON N. SPRAGUE, late of Keene, of the State of new Hampshire, but now of South Framingh'am, of the State of Massachusetts, have invented certain new and useful Improvements in Machines for Making Wooden Shanks for Boots or Shoes; and do hereby declare the same to be described in the following specification and represented in the accompanying drawings.

The invention is intended to impart to a shank-- piece, while being manufactured, the requisite curvature and bevel of its two opposite longer edges, such invention'consisting inthe combination of a=vibratory shank-holder with a cutting-blade, (having its cuttingedge'curved in two directions, as hereinafter specified) and with a bed slanting or inclined to the plane of motion of the said blade, all being essentially as shown and described also, in the combination of a bed, eubstantially as represented, with a knife curved in two directions on its cutting-edge, as described, my provided with mechanism to cause it to cut through the hlank, down to and at an inclination to the blank-supporting snrface'cf the bed without going through such bed, all

being substantially as set forth.

In the drawings, Figure 1 is a. perspective view of so much of a shank-cutting machine as, with the other figures, may be required to illustrate my invention. Fig. 2 is a inngitndinaland central'eeetion of the parts shown-in.

said Fig. 1. Fig. 3 is a horizontal and transverse section of the cutting-blade and its stock, such section being taken through a line from x to y of Fig. 2. Fig. 4 is a top view of a shank-piece shaped on its longer edges by. of its two;

means of the machine, the bevels ends being otherwise efl'ected.

- The bed for supporting the shank-blank as arranged between and against two parallel guides, '11 b, whose inner. edges arejuclined to the frame 0. Hinged or pivoted tot-he stock B is a rod, e, which is also pivoted to and extended from a crank-pim e' projecting from a wheel, 0, fixed on a shathdn: the said shaft, when in revolution, canses,'through the instrumentality oi the-connecting-rod, a inciprocating rectilinear movement to be imparted to the stock B, which is provided with a cutter or blade, D, which, nearE -its ends, is fixed to the stock. The cutting-blade, between its supports, and with reference-to the'stock, is bowed or arched, as shown in Fig. 3, and its lower edge-isear'vilinear and concave, to fit to the surface a of the inclined bed A, or to impart to the edge of ashank-hlank the proper curve and bevel.

Were the cnttingedgc of the blade to be cnrvedin one direction only-that is, as shown in Fig. 3--the ddie only of such edge would come in contact with the slanting bed on depression of the blade against such; but by properly arching the cutting-edge vertically, aezwell as horizontally, it will be caused to fit throughout to the inclined surface of the bed, when in contact therewith.

- To sustain the blank preparatory to and while being cut, I provide for it a holder and a gage or support piece, the said gage being represented at F and the holder at E. The latter consists of a frame or yoke, pivoted near its ends upon a rod, f, and provided at its middle with elastic jaws g g, to extend across and embrace the gage F, which, at its middle, is fastened to such jaws. They projectbeyond it in manner as shown, and are designed to receive between them, against the inner edges of the gage, the shank-blank, and hold it preparatory to and while being cut on the surface a by the blade. This shanbgage has ahheel or part, h, standing at a' right angle to t e rest.

After a shank-blank may have been duly applied to the holder and gage, which, during the application, have occupied positions as represented in Fig. 3., the holder should be swung or moved ibrwariso as to carry projecting part of the blaiik 'over-and the surface a. This'having cuttingblade D should be forced down against and so as to cut through the blank, whereby such blank will be curved and beveled along one edge of it. After such may have been ac complished, the holder should be retracted, and the blank should be turned about in it,

so as to enable its opposite longer edge to'be reduced on the holder next being moved forward,

- so as to carry the blank upon thesurface a, and

the blade being depressed on and through the blank, as before described. *In this manner the blank becomes curved and beveled on both of its. opposite longer edges, as represented in Fig. 4. v

Difl'erent gages may be provided for different sizes and styles of shanks, and the-curva tures of the edge of the cutting-blade may be varied according to the peculiar curve and bevel required to be imparted to the shankedge. H l

The beveling and trimming of the ends of the shank-blank may be efl'ected by means of a'straight blade or cutter, or by other suita-,

.ble means.

- Having described my invention, what I claim, and desire to secure by Letters Patent is 1: The combination of the vibratory shankholder with the cutting-blade, (having its out-- ting-edge curved in two directions, as specified,) and with the bed slanting or inclined to the plane of motion of the said blade, all being constructed andto operate substantially as shown and explained.

2. For supporting a shank-stifl'ener blank,

and cutting it from its upper to its lower surface, concave and beveling along its edge, the combination of a bed, substantially as represented, with a knife curved in two directions on its cutting-edge, as described, and provided with mechanism to cause it to cut through the blank, down to and at aninclination to the blankesupporting surface of the bed without going through suchbed, all being essentially as explained.

- WATSON N. SPRAGUE.

Witnesses B. H. EDDY, J. R. Snow.

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