US838422A - Tack-puller for shoe-lasts. - Google Patents

Description

PATENTED DEC. 11, 1906.

P. S. KINGSLAND. TACK FULLER FOR SHOE LASTS.

APPLICATION TILED 113.27, 1906.

N. y g V a k 1 UNITED STATES PATENT OFFICE.

TACK-FULLER FOR SHOE-LASTS- Specification of Letters Patent.

Patented Dec. 11, 1906.

Application filed. February 27, 1906. Serial No. 303,280.

To all whom it may concern.-

Be it known that I, PHILIP S. KINGSLAND, a citizen of the United States, and a resident of St. Louis, Missouri, have invented certain new and useful Improvements in Tack-Pullers for Shoe-Lasts, of which the following is a specification containing a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

My invention relates to a tack-puller for shoe-lasts and the object of my invention is to construct a simple apparatus which is mechanically operated and which rapidly and efficiently pulls the tacks that temporarily secure the insole of a shoe to the wooden shoelast.

It is the present practice to extract or pull the tacks from the last by inserting a suitable tool beneath the head of the tack and prying upwardly on the same or by striking the side of the head of the'tack with the sharp edge of a suitable instrument, and these methods involve considerable time and labor and very often mar or roughen the surface of the insole and sometimes split or check the hard wood of which the last is formed; and I propose to constructa machine which will positively engage the head of the tack and draw the same upwardly without marring or in any way affecting the insole or the last and at the same time accomplish the work of removing the tacks in much less time than is now required.

To the above purposes my invention consists of certain novel features of construction and arrangement of parts, which will be hereinafter more fully set forth, pointed out in my claims, and illustrated in the accompanying drawings, in which- Figure 1 is a side elevation, partly in section, of my improved tack-puller. Fig. 2 is a vertical section taken on the line 2 2 of Fig. 1. Fig. 3 is an enlarged detail section taken on the line 3 3 of Fig. 2. Fig. 4 is a detail section taken on the line 4 4 of Fig. 3.

Referring by characters to the accompanying drawings, 1 1 designate a pair of standards provided on their inner faces with vertically-arranged slots 2, and the upper ends of,

said standards are framed together by a cross-piece 3, having a horizontally-disposed ring 4 formed at its center. Integral with each standard 1 and projecting inwardly there' from is a horizontally-arranged arm 5, the inner end of which is bifurcated, as indicated by 6. Arranged for vertical movement through the ring 4 is a tubular plunger 7, the. lower end of which tapers downwardly, as indicated by 8, and removably positioned'on the upper end of this plunger 7 is a cap 9. 6o

Arranged for vertical movement through the plunger 7 is a rod 10, the upper portion of which is provided with a series of teeth 11 and the extreme upper end of said rod extending upwardly into a cap 9 and there being a pin 12 transversely arranged through the upper end of said rod, which engages against the upper end of the plunger 7 to prevent said rod from moving toofar downwardly through the plunger.

Formed through the side of the plunger 7 is a vertically-arranged slot 13, in which is pivotally mounted a pawl 14, theupper end of which en a es beneath the teeth 11 and being normajly held therein by a leaf-spring 7 5 15, positioned beneath the lower end of the pawl. The lower end of this pawl normally extends a slight distance beyond the exterior of the plunger 7. Rigidly fixed t0 the lower end of the rod 10 is a transverse bar 16, the

ends of which ride in the slots 2. Pivotally arranged. on this bar 16 on each side of the rod 10 is a pair of depending jaws 17, the lower ends of which are provided with the horizontally-arranged prongs or teeth 18. 5

Formed integral with and projecting upwardly from each jaw 17 is an arm 19, the inner face of which is slightly curved, and each arm passes through a bifurcated end of the corresponding arm 5. end of the rod 10 is a vertically-extending recess20, in which'operates a plug 21, which bears on the upper sides of the jaws 1'7, and seated in the recess 20 above this plug is a stiff expansive coil-spring 22. This coilspring causes the plug 21 to forcibly bear upon the jaws 17', thus tending to spread said jaws apart. Fixed to the upper end of the cap 9 is a screw-threaded rod 23, on the upper end of which is seated the lower end 'of mo a turnbuckle 24, and screw-seated in the upper end of said turnbuckle is the lower end of a rod 25. Arranged for rotation a suitable distance above the'pl'unger is a crank-shaft 26, and connectingthe crank thereof with the 10 5 rod 25 is a link 27. This crank-shaft provides means whereby the plunger is vertically reciprocated, although the same motion may be attained by utilizing a rack and pinion, a

cam, or any device capable of imparting con- I 10 tinuous vertical reciprocation.

The operation of the tack-puller is as fol- Formed in the lower 0 lows: When the plunger 7 is elevated to its limit of movement by the operation of the crank-shaft 26, the lower end of the pawl 14 passes beneath the ring 4, and by so doing 5 the upper end of said pawl is moved out of engagement from between the teeth of the rod 10, and said rod on being freed drops to its limit of movement or until the pin 12 rests on top of the plunger 7 within the cap Io;9'. As the arms 19 of the jaws 17 pass below the tapered lower end 8 of the plunger 7 the pressure of the coil-spring 22 will force the plug 21 downwardly and throw the aws 17 apart. When thus positioned, the last A,

[5 bearing the insole B,'which is held by the tackO, is now moved to a position below the lower ends of the standards 1, with the tack to be pulled immediately below the cen -ter of the plunger 7. As said plunger and parts carried thereby move downwardly the teeth 18 of the jaws 17 while open or spread apart willengage on the insole on each side of the tack to be pulled and-will remain in this position while the plunger 7 continues in its downward movement. As said plunger continuesto move downwardly the tapered dower end 8 thereof will engage against the curved inner faces of the arms 19 and spread said arms apart, which will necessarily close 0 the jaws 17 and cause the teeth 18 to close upon or engage beneath the head of the tack C. The point of the pawl 14 will during this operation engage beneath one of the teeth 1 1, and thus lock the plunger 7 and the rod 10 3 5 together, so that when the plunger is elevated said rod, with the jaws 17, will move simultaneously with said plunger. The teeth 18 gripping the tack C will draw said tack upwardly out of the last A and the insole B, in

40 which it was seated. Just prior to the time the plunger 7 reaches its upper limit of movement the lower end of the pawl 14 will ride beneath the ring 4, and the point of said pawl will thus be disengaged from the tooth beneath which it was positioned, and at this instant the cross-bar 16 strikes against the 'under sides of the arms 5, which causes the rod IO-and parts carried thereby to drop to their limit of movement, and by so doing the arms 19 leave the tapered lower end of the plunger7, and the pressure of the plug 21- swings the jaws open, thus releasing the tack that has just been pulled.

The operations just described take place in very rapid sequence, and therefore the tacks are very rapidly and positively withdrawn from the lasts. The position of the plunger 7 relative the rod 10 is adjusted vertically by means of the turnbuckle 24.

M 1. In a tack-puller, a reciprocating plunger, a rod operating independently therein, a pair of tack-engaging jaws pivotally carried by the lower end of the rod, and means whereby the rod is looked to the plunger to move therewith during a period of reciprocation of said plunger; substantially as specified.

2. In a taclepuller, a reciprocating plunger, a rod operating independently therein, a pair of tack-engaging jaws pivotally carried bythe lower end of the rod, means whereby the rod is locked to the plunger to move therewith during a period of reciprocation of said plunger, and means whereby the rod is released when the plunger reaches its upper limit of movement; substantially as speci- 3. In a tack-puller, a reciprocating tubular plunger, a rod arranged to slide in said plunger, a pair of jaws pivotally arranged at the lower end of the rod, and arms integral with said jaws which are engaged by the lower end of the plunger; substantially as specified.

4. In a tack-puller, a reciprocating tubu lar plunger, a rod arranged to slide in said plunger, a pair of jaws pivotally arranged at the lower end of the rod, arms integral with said aws which are engaged by the lower end of the plunger, and a spring-pressed plug located in the end of the rod and engaging on top of the jaws to force them apart substantially as specified.

5. In a tack-puller, a frame, a tubular plunger arranged for reciprocation therein, a rod sliding through the plunger, a pair oi jaws pivotally secured to the lower end of the rod and arranged to be engaged by the lower end of the plunger to be forced together, means whereby said jaws are forced apart when out of engagement with the lower end of the plunger, means whereby the rod is locked to the plunger during a part of its reciprocation, and means whereby the locking means is released when the plunger reaches its upper limit of movement ,substantially as specified.

In testimony whereof I have signed my name to this specification in presence of'two subscribing witnesses.

PHILIP S. KINGSLAND. INitnesses: I

M. P. SMITH, JOHN C. HIGDON.

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