USRE4724E - Improvement in heel-cutting machines - Google Patents

Description

0. G. CRITCHETT. Heel Cutting Machine.

ReissuedJamSO, 1872.

No. L724.

ZZZ er. 67 5' fail/e6 vertical knife to cut to which the shoe 0 is jack UNI D STATES PATENT OFFICE.

OLIVER acerrcnnm, 0F 'STONEHAM, MASSACHUSETTS,' ASSIGNOR T0 DAVID ,WHITTEMORE.

IMPROVEMENT m HEEL-CUTTING mAcfl-lmes.

. Specification forming part of Letters Patent 110,413,183, dated J one 21, 1864 reissue No. 4,724, dated January of Stoneham, in the county of Middlesex and State of Massachusetts, have invented an lm provement in Heel-Cutting-Machines; and I do hereby declare that the following, taken in connection with the drawing which accompa nies and forms part of this specification, isa description of my invention s'ufiicient-"to enapassing through and jointed to the table a, the lower ends of-the levers being spreadapart to ble thosejskilled. in the art to practice it.

Thisinvention relates to the construction of machinery for trimming the heels of boots and shoes; and. myimprovel'n ent consists'in the arran gement of a rotary cutter-cylinder tomove around the heel while the bootor' shoe is jacked:

or held stationary, the pla nebf movement of the cutti lg-face' of the' cutter-cylinder being made to accord to the contour-to be given to the edge of the heel, as willbe described." The invention further consists in the employment, in combination with a jack or carriage upon which the shoe is fastened or supported, of a down or trim the front edge of the heel. H I

' A machine embodying, m 'improvement'is represented in the drawing, i igure'l showing a top view, Fig. 2a side eley'ation, and Fig. 3

an end elevation of the-same.

a denotes a table, upon which a carriage, b,

ed, slides horizontally; (I, a guide-plate or frame, secured at slich height above the table a as to come just in line with and'so as to extend around the lower edge of the sole of the shoe under the heel when the carriage bis' rnn u'pinto the position'shown in the drawing. -A'd1'u1'n or pulley, e, rotates in bearings f on the top of a standard, 9, and the bottom of the shaft of this pulley is connected by anniversaljoint', h, to a long shaft, i,'journaled'at its lowerend bya ball-and-socket joint, r, to a sliding plate, 70. This shaft bears the cutter-cylinder m, carrying any suitable number of cutters or knives n. l

l The cylinder is made to move around the heel, and according to the form of the heel, as follows: The plate It rests upon the table a, and has one or more friction-rolls, o, projecting from its lower surface. through a cam or patterngroove, 1), in the table'a. This grom'eis of such form or cnrvethet movement of the slideplate is around it brings thecntting-edge of the knife n asitrotates into such position with respect to the heel as to-cut the heel to proper shape. Rotation of the drum edrives theicutter-cylinder m, and the joints h and rpermit lateral movement of the cylinder m, such move-- ment being controlled by the groove 1). To hold the-shoe flrmly in position while the'heel is being trimmed there are 'twojaw-levers, q

cause the jaws to. grasp the shoe by means-of 11021111,.8, on a shaft, t, which shaft is connected by an arm, u, and link, v,, toa treadle-lever,

w. l-)epressio n .of the treadle forces the cam against the inner'faces .o'f thc jaw-hivers and brings the jaws against the shoe, the trea 'lle being kept inposition by the teeth of a rack,

' w, or other suitable 1nean's, and when the treadle is released a spring, y, draws .t-helower ends of the levers toward each'other and thejaws away from the shoe.

Having described 'the mechanism-for giving form to the edge of the heel, Iwill next describe that for finishing or cutting off the front part thereof. When the heel has been trimmed the, carriage b, on which the shoe is supported,

- is drawn forward under aknife-frame, a. To

a vertical arm or rod, b depending froma cross-head, c, a knife, (1, is fixed, said knife sliding vertically on ways e. The cross-head is mounted upon the topsof "ertical sliding rods j", which descend throughthe table a and are fastened under the table to a treadle,

g'." The movement of the knife d is in a plane at right angles to the line of movement of the shoe-earring so that, when-the knife is brought down by the depression of the treadleg', it cuts theheel square across the shoe. To regulate the depth of the cut, or to prevent the knife from cutting'into the sole of the shoe, a stop plate, h, is fastened to the rod 11 by an adjust-- lug-screw. This'stop-plate moves up and down with the knife, and is so adjusted with'respect thereto as to strike upon the sole of the shoe whenthe knife has cutto lsuflicien't depth or through theheel, thus arresting-furtherprogress of the knife. The rise of the knife is et I fected by a spring, 1'', as will be readily understoodchine, or by I would remark that-,although I have def scribed the mechanism for forming the edge of the heel-and that for finishing or cutting 011' the front part thereof as combined or affixed to the same frame or table, they may be affixed to separate tables or supports and used independently, each "mechanism being perfect in it'- self, and performing its function without aidiromtheother. a I .7-

The cam-groove, instead of being formed in the table a, may be made in a piece which rests upon the table, and is detachable therefrom, so that the shaft and'cutter may be guided in different paths suited to the trimming of heels of different contours. Thc'piece k, which bears the ball-and-socket joint of the shaft upon the carriage k, is made adjustable toward and from the heel, so that by adjustment obtained bymeans of thescrew I) the heel may be trimmed t'o any desired size withincertain limits. The-= guard plate d may also be changed for others of various sizes; and it should be observed hat the shoe ought to be'so adjusted in height with respect to-this guard-plate as not to expose above itany of the vamp. If the heel is nailed upon the shoe so as to be more upon one side than the other,theheel is brought so as to occupy a central position beneath the driving-shalt i, which fact is ascertained'by measurement from some fixed part of the ma-. correspondence of the topof the heel with some convenient removable gauge.

The shoe, however, has, in such cases, to be moved a little to one side or the other, to accomplish which the hole for the pin entering the .rear part of the last from the holder has to be slot-ted sidewise. The shaft 2', being putin rotation, is drawn by the operator around the heel, force beingapplied for that purpose to any suitable handle, as shown at i, for example, and the shaft being guided by the in: 'fluenee exerted on the beariugcafriage by the cam-groove. 4 I

It will be obvious that 'with this machine heels can be very rapidly and nicelytrimmed, and to much better advantage thanin machines where the shoe -is carried around by hand or by machinery to the action of stationaryknii es, .or of knives capable ,of rotation only outheir own axes or onthe axes of the cylinders upon which theyareflxed, 4 y I Havingdescribed my'invention what I claim is as follows:

*1. A'heel-cutting machine composed .of the following elements: first, a jack or carriage for supporting the shoe and maintaining its heel stationary; second, a cutter rotatingon its own axis; and third, mechanism for causing" the cutter to traverse around and form the contour of the heel, the whole being constructed, combined, and-operating together substantially as above set forth.

. 2. The means for operating causing it to traverse the same being the universally-jointed shafts "and the cam-groove, arranged to operate substantially as specified.

the cutter and ter-carricr b the knife gauge h, arranged and operating stantially as set forth.

4. The combination, bl, the knife or cutter d, y a jack or carriage for supporting a shoe,

stautially as and described.

or cutter. d, and the andthe; gauge h, of

Witnesses ntenna,"

about a stationary heel,

3. The combination ofthe reciprocating out-.-

together suhv with the cutter-carrier sub- Q for the purpose hereinbefore onvene. cnrrcnsrr f

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