US147967A - Improvement in heel-crimping machines - Google Patents

Description

. 3Sheets--Sheet2 E. B. PARKHURST.

Heel Crimping-Machines.

H .147, 6 Patented Feb.24.11874.

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WITNESSES. INVENTOR.

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Heel Crimping-Machines.

N0.l47,967 Patented Feb.24,1874.

Fig.6.

INVENTOR.

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UNITE STATES A'IENT OEEIoE.

EDWARD PAEKHUEST, o woEUEN, ASSIGNOR To LEWIS B. EUssELL,

or LYNN, MASsAoHUsETTS.

' IMPROVEMENT IN HEEL=CRIMPING MACHINES.

Specification forming part of Letters Patent No. 147,967, dated February 24, 1 74; application filed January 10, 1874.

To all whom it may concern:

Be itknown that I, EDWARD B. PARKHURsT, of Woburn, in the county of Middlesex and State of Massachusetts, have invented a new and valuable Improvement in Heel-Crimping M achines; and I do hereby declare that the following is afull, clear, and exact description of the construction and operation of the same, reference being hadto the annexed drawings, making a part of this specification, and to the letters andfigures of referencemarked thereon.

' Figure 1- of the drawings is a representation of a longitudinal vertical section of my heel-crimping machine. Fig. 2 is a top view of the same. Fig. 3 is a horizontal section, and Fig. 4 a perspective view, of the same. Figs. 5, 6, and 7 are detail views.

This invention relates to certain novel improvements on machinery which is designed for crimping the stifienings of boot and shoe heels. My improvements have relation especially to means for holding and adjustinglthe last on which the leather is crimped; also, to two gravitating dischargers, which are applied to avertically-reciprocatinghead, and arranged on opposite sides of the last, for the purpose of freeing the crimped stiifenings from the last after the crimping devices have receded outof the way. My invention also has relation to devices for holding the blanks, deliverin g them in front of the crimping devices, centering them with respect to these devices, and, finally, releasing them as they are taken by the crimpers; also, to a novel construction of devices for pressing and crimping the leather blanks on the last, and to certain novel mechanism for actuating the crimpers, and for giving two strokes to the bottom crimping-jawsto one stroke given to the side and back jaws, all as will be hereinafter explained.

In the annexed drawings, A represents the frame of the machine, and A the horizontal top thereof, on which the feeding, crimping, and discharging devices are arranged. A designates ahorizontal driving-shaft, on which is applied a driving-belt pulley, a, a sliding friction-clutch, a and a pinion spur-wheel, a The clutchis actuated by means of a loaded treadle, a on which the operator places his foot when he wishes to give motion to the which plays in the cam-groove c in said drum 0 designates a transverse yoke, to the ends of which two rods, 0 C are pivoted. This yoke is connected to the carrier C by means of a screw, d, on which an elastic washer, d, is applied. By turning the screw (Z, the yoke 0 is adjusted forward or backward, and held wherever desired. The rods 0 G extend forward and outward, and are pivoted to the backs of two horizonta-lly-vibratin g jaws, c c, which are pivoted to cars formed on a tube, 6, that slides on a centering-pin, E. The jaws c c are intended for crimping the blan {S on the two opposite sides of a last, L, and the end of the sliding tube 6 between the jaws e c is intended for crimping the blanks about the heel of the last, for which purpose the pressing-s11 rfaces of the jaws and the tube are shaped so as to conform to the corresponding surfaces of, the last.

The sliding tube 0 and the jaws c c are moved up to and from the last at proper times by the reciprocating movements given to the carrier 0 and during the pressing action of said parts 0 c 0 they are allowed to yield slightly by means of the washers d and another washer, f on the centering-pin E. The cente'ring'pin E is guided by a bridgebearing, E fixed to the frame-top A and the rear end of this pin is adjustably secured to a slide, E working between the guides 12 b, and receiving lon gitudiual movements from the cam-faces f f on the ends of the drums C and D.

b b by means of a wheel, 9 playing in a twothrow cam-groove, g", made into the periphery of the drum D. This groove 9 is so shaped that it gives two strokes forward and back to the crimpers g g, while the crimpers e e a remain at rest, clampingv the leather, thereby rounding and finishing the stiffeners in a much better manner than would be done if only one stroke were given to the crimpers g g. The laterally-vibrating movements are given to the crimpers g g by means of anti-friction rollers i i, applied on the rear ends of the griper-arm's, which rollers playback and forth in two oblique slots, h h, made through the top of frame A. The last or former L is adjustably secured to an overhanging bracket, L, fixed on the frametop A in front of and in line with the crimpers. Two screws, 1 Z, secure the last to its bracket, and two other screws, l l, aiford abutments for the last when properly adjusted by means of the screws ll. The last is firmly held against lateral displacement by means of two cylindrical blocks, 2 2, which are recessed into the upper side of the last, and also into the lower side of the overhanging portion of the bracket L, at the ends of which blocks indiarubber or other elastic substance may be applied. An end abutment for the last L is formed by recessing the end into the bracket L, as shown in Fig. 2. J represents avertically-moving head, which is guided by means of rods J J, that pass through the frame-top A ,a11d also through fixed pendants J secured to the under side of this top. Vertical movements are given to the head J by means of arms j, which are fixed on a rockshaft, j, and loosely attached to blocks, which are adjustably applied on the rods J. On one end of the rockshaft j a toothed segment, k, is keyed, which is engaged by teeth on one end of a vibrating lever, 70, the other end of which lever is held in contact with the cam-edge f of the drum D by the weight of the head J and its attachments. The camedgef is so shaped that it will holdup the head J during the crimping operation, and allow the crimpers to pass freely beneath this head. 011 each side of the middle of thelengthof the head J, and to the front side thereof, two horizontal rods, 12 a, are

" rigidly secured at their outer ends, which rods coincide with each other, and, if desired, they may be adjustable. On these rods are applied the devices for receiving the leather blanks, and holding them in proper position for being taken by the crimpers; also, the devices for releasing the blank-holders when the crimpers take hold of them, and also the devices for discharging the crimped stiffeners. These several devices I will now describe, commencing with the holders. N N are two angular levers, which are applied on the rods n n, so as to vibrate freely, the lower ends of which levers are hooked at 3, and held in contact with the front side of the head J by the weight of the upper projecting arms. The hooks 3 afiord rests for the lower straight edges of the blanks, and these hooks are in a plane parallel to the top of the frame A. When the head J descends to deliver a blank, the blank is released from the resting-hooks 3 by the upper arms of the levers N striking tripping-pins 4 4, fixed into the sides of the bracket L. P P designate holders for the extremities of the blanks, which holders have vertical lips 5 formed on them, and they are formed on tubes 6, which receive, loosely through them, the

rods n n. These end-holders P are held flatly in contact with the front 'face of the head J, and the tubes on which they are formed have annular grooves in their peripheries, which leave annular flanges 1" on their outer ends. These flanges 1" are received in notches made into the shortest arms of angular levers s s, which are fixed on rocking pivots t if, having their bearings in posts rising from and flxed rigidly to the head J near its extremities. The longer arms of the levers s are held down in proper position by springs 7 7, and when the head descends posts 8 S are struck by said longer arms and the holders P P are both moved outwardly and caused to release the ends of the blanks confined between them. When the head J rises the holders P P are again moved outwardly to receive a blank by the following contrivance: On the rear ends of the rocking pivots t t, arms at m are keyed, the free ends of which are engaged by toothed segments, as indicated by dots in Fig. 4.

When the head J rises, the free ends of arms on m are depressed by means of a goose-neck, R, which is fixed to the bridgebearing E. This gives an outward lateral movement to the holders PP, and, as before stated, prepares them to receive the blanks. VV designate two dischargers, which are pivoted on pins '0 'u, projecting horizontally from the heads of two vertical guides, w 20, applied on the inner ends of the rods n 02. These dischargers V V hang freely from their supportin gfrom the last during the descending movements of the head J.

Having described particularly the construc tion of the several parts composing my i1nproved crimping-machine, I will now briefly describe the general operation of the ma chine.

The blanks from which the stiffeners are produced have a lower straight edge and an upper arched edge, as shown by Fig. 7. These blanks are adjusted one at a time into the blank-holders on the reciprocating headJ, when this head is fully raised and said holders are in positions to receive such blank. The head J then descends, and the pin E is moved up so as to firmly hold the blank centrally against the heel end of the last L. The head J then rises, and the concave end of the tubu= lar crimper e is forced up against the last, after which the side crimpers e e are brought into action and press thesides of the leather stiffener, as shown in Fig. 3. While the stiifener is thus held, the crimping-j aws gg operate twice upon the loweredge of the stiii'ener and crimp this edge against the bottom of the last. The crimping devices then recede and the head J is caused to descend, during which movement the dischargers V V free the finished stiffener from the last.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-- 1. The last or former L, secured to the overhanging portion of a bracket, L, by means of adjusting-screws Z Z, abutting screws Z Z, and guide-blocks 2 2, substantially as described.

2. The gravitating disehargers V V, combined with the last L and a vertically-reciproeating head, J, substantially as described.

3. The reciprocating crimper e, in combination with the pivoted side crimpers e e, and the crimping-shears g g, and last L, substantially as described.

4. The reciprocating centering and holding pin E, in combination with the last L and a vertieally-reciprocating head, J, carrying the blank-holders, substantially as described.

5. The yoke O ,adjustab1y applied to the sliding carrier 0 in combination with the rods 0 and the side crimpers c e, substantially as described.

6. The pivoted angular levers N, constructed with blank supports 3, and combined with the head J and tripping-pins 4, substantially as described.

7. The lipped blank-holders P on sliding tubes 6, in combination with flanges r, forked levers 5, springs 7, fixed pins 8, arms m, and goose-neck It, as and for the purpose described.

8. The drum D, provided with the zigzag groove g constructed to give two forward strokes to the shear-crimpers g g at each turn of shaft B, in combination with drum 0, provided with the groove 0, constructed to give one stroke to the crimpers e e c, at each turn of said shaft B, substantially as described.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.

EDWARD B. PARKHURS'I.

JOHN WINN.

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