US58178A - Improved shoe-shanking - Google Patents

Description

` TIMOTHY K. REED, OF EAST BRIDGEVVATER,MASSACHUSETTS.

IMPROVE@ SHOE-SHANKlNG.

Specification forming part of Letters Patent No. di' dated September 18,1866.

To all whom it may concern:

Be it known that I, TIMOTHY K. REED, of East Bridgewater, county of Plymouth, State of lllassachusetts, have invented an .lin provement in the lllanufacture of Shoe-Shanking; and I do hereby declare that the following, taken in connection with the drawings which accompany and form part of this specification, is a description of my invention sutlicient to enable those. skilled in the art to practice it.

This invention relates, principally, to the production of what is known to shoe 1nanufacturers as shoe-shanking, or strips of leather scarfed on the opposite edges, and generally of trapezoidal form, each piece having a wide and narrow end and one long side, the long side being upon opposite edges ofthe respective pieces for right and left boots or shoes.

A s usually made each `piece is cut oft from a strip of leather or leather-board and subsequently scarfed; and the object of my invention is to so out the stock that in forming the scarf for one piece the cut forms the adjacent scarf for the next piece, all the material `thus entering into the formation of the shanking, and enabling me to produce at least twenty per cent. more from the samematerial than by the usual process.

The invention consists in so arranging a knife or knives in reference to bed and gage pieces that, by turning the stock after each action ofthe knife, or by carrying it from one l knife to another, the successive cuts shall be in alternately angular directions across the lmaterial 5 also, in so arranging two bed-pieces with reference to a knife working in connection with each that the chaniferingor scarfin g cuts are alternately made by the two knives at opposite angles to the edge of thestock 5 also, in the details of arrangement of the mechanism by which the work is performed.

The drawings represent a mechanism einbodying my invention, A showinga side elevation, and B a plan of the cutters, gages, beds,

&c.

a denotes a table supporting twolong bedpieces, b 0,1:l1e bed b being horizontal and the bed o inclined, a-s seen at A. Each bed has a vertical side Wall, d. At a short distance from the front end of each of these walls is a vertical upright, e, placed at a distance laterally as respects the wall d equal to the thickness of the material to be cut up and made laterally adjustable to suit the thickness of different pieces of stock, the stock being run through between these walls or guides for the aciion of vertically-reciprocating knives.

j'fare two shafts slidin vertically through tubes or bearings g they being connected through a cross-piece, h, to a treadle or other suitable mechanism, by which they are recipro cated vertically. At their upper ends these shafts are connected by a cross-head, from which depend two pairs of cuttenstocks, t', each pair of which carries a knife, 7c, which plays vertically between the wall d and up; right e on the saine side of the machine, the knife being sct at a horizontal angle with 'respect to` the wall and upright, as seen at B. Each knife is made with a vertically-inclined cutting-edge, so that in its descent it shall operate with a drawing cut, and the edge is preferably ground from the outside of the plate toward the inner surface thereof. Beneath each knife and in line with each bed-piece b c is a 'block,`l, havin a saw kerf or slot, u, into which the knife descends, and on the outer side of each upright eis a stop or gage, m.

`The strip of stock is rst placed on the horizontalbed b, with one long edge on the bed, and one surface held against the wall d. It is then thrust through between the Wall and upright e until the end strikes the stop or gage m, the opposite surface bein gsu1 ported against the outer surface of the upright. The knife is then brought down and cuts through the stock at an angle corresponding with the angular position of the knife or the angle desired in the scarf, the cut being at a right angle to the edge supported on the bed. The stock is then carried across to the inclined bed, and the same edge and opposite surface supported by said bed `and its Wall, with the end thrust through between the wall and upright and against the stop m. tween this Wall andupright 4being then op` erated, the stock will be cut through at an angle with the ed ge supported on the bed, and with a chamfer running in an opposite direction to the one cut by the opposite knife. The stock is then shifted to the first knife, and the repetition of thescoperations cuts `the stock into the shankin g, as represented at (l, which shows a surface view and a section of the piece of The knife playing be' out the opposite scarts or chamfers.

stock cut, the red lines showing the direetion of cut.

To vary the amount of inclination of the inclined side with reference to the straight or right-angular side, the bed c is made adjust able by set-screws and slots, as seen at r, so that it may be set at any required inclination; and to vary the Width of scarf on each piece of shankin-g one stock in each pair of Cutterstocks is made capable of swinging and of being iXed in position by means of screws and slots o, so as to alter the angle of presentation of the knife.

To alter the width of the shankin g the stops m are made movable and adjustable by means of screws and slots 19, and .the uprights e are made movable and adjustable for stock of varying thickness by screws and slots, as seen at q.

It Will be obvious that when the opposite sides or searts are'to bev cut parallel one knife and bed only may be employed, the stock being turned edge for edge after eaeh cut; or two knives and beds may be employed, both beds being horizontal, or both may be inclined in opposite directions, the stock being shifted from one bed to the otherwithout turning to It will also be obvious that the arrangement of the knives and bed-pieces may be varied Without departing from the spirit of my invention,

which is in so combining aknii'e or knives with guides or bed-pieces for supporting the stock in position that all the material is utilized by entering into the formation ot' the shanking, substantially as set forth.

The Wall and upright upon each side may be placed at such distance apart as to admit of the entrance of two or more strips of stock lside by side, to be cut simultaneously, as will be readily understood.

I claim- 1. So combining andjarranging a knife or knives and bed and guide pieces that in scart'- ing one edge of each piece of the shanking the opposite scarf of the next piece is formed thereby, substantially as set forth.

2. Combining with a bed which holds the stock in position to be ent square or at one angle to its Vsupported edge a bed which supports the stock in position to be ont at an angle to thewoppositc side, substarnially as described.

3. Conjointly and specifically the provision i for cutting stock of various thicknesses and into various Widths, for scariing the material to a greater or less degree, and for inelining one ot' the scarfed edges more or less, all substan-` tiall y as specified.

T. K/REED Witnesses:

J. R. PERKINS, HENRY SoU'rnWoR-rn.

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