US893871A - Tack pulling and driving machine for lasted boots and shoes. - Google Patents

Description

No. 893,871. PATENTED JULY 21, 1908.

" c. F. PYM.

' TACK PULLING ANDYD RIVING MACHINE FOR LASTED BOOTS AND SHOES.

APPLI OATION FILED SEPT,23,1903.

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PATENTED JULY 21, 1908. 0. F. PYM. I, TACKPULLING AND DRIVING MACHINE FOR LASTED'BOOTS AND SHOES.

APPLICATION FILED S EP'I'. 23,1903.

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TACK PULL ING'AND DRIVING MACHINE FOR LASTED BOOTS AND SHOES.

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UNITED STATES PATENT OE I E.

(HARLES F. PYM, or EssEx, ONTARIO, CANADA, ASSIGNOR or ONE-HALF To KRENTLER BROTHERS COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

TACK PULLING AND DRIVING MACHINE FOR LASTED BOOTS AND SHOES.

Specification of Letters Patent.

Application filed September 23, 1903. Serial No. 174,367.

Patented July 21, 1908.

To all whom it may concern:

Be it known that LOHARLEsF. PYM, a subject of the King of Great Britain, residing at Essex, countyof Essex, Province of On.- tario, Canada, have invented a certain new and useful Improvement in Tack Pulling and Driving Machines for Lasted Boots and Shoes, and declare the following, to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to tack pullers to be used in connection with shoe lasting and nailing machines.

In making welt shoes, the shoes are first lasted before being sewed and, in the process of lasting, the upper is held in its lasted position by a large number of tacks, each tack being driven into the leather as the latter is pulled over with the proper tension. The result is that the tightly stretched leather is held immovably by a row of tacks extending around the bottom in the region subsequently traversed by the needle of the sewing machine in sewing the welt to the upper. It

is obvious, therefore, that this subsequent sewing operation cannot be properly accomplished while the lasting tacks are in place, as the needle is liable to strike the tacks and become broken. It is necessary, however, in order to retain the upper in proper shape, to hold the upper firmly against shifting its position on the last, and accordingly the usual practice is to remove the lasting tacks by hand and drive in a few stay tacks out of range of the needle and at such points as the judgment of the operator deems necessary according to the peculiar conditions and position of the leather at the various points where it is overlapped about the bottom of the shoe. A few tacks only are required for this purpose, because it is the custom, after the shoe has been lasted (i. a pulled over and tacked down tightly as stated), to allow the shoe to set a number of hours before sewing or inseaming, thereby permitting the stretched leather to become more or less fixed in position; but notwithstanding this setting and fixing of the upper, it cannot be properly sewed unless held at the critical Oints as determined by the skilled operator.

ence the anchor tacks are driven in, as

stated, by hand, butusually in adifl'erent place from the lasting tacks and much fewer in number, four tacks being usually sufficlent. driving in of the stay tacks .calls for considerable experience and skill on the part of the operator, as he must judge where and when to drive the stay tacks by Observing, among other things, the give of the leather, or its tendency to recover its position from which it was Originally stretched, and he must drive the stay tacks instantly before the leather has become displaced, and also he must place one or more tacks at those points where the needle is liable to tend specially to shift the leather because of any extra overlapping or other special condition.

In the drawings z Figure 1, is a side elevation indicating the general parts of a nailing machine and showing the part used for pulling the tacks. Fig. 2, is a detail of the tack pulling claw. Fig. 3, shows the end of the arm to which the claw is attached. Fig. 4, is a slightly modified form of claw. Fig. 5, shows the end of the guide or guard against which the shoe and last are placed. Fig. 6 is a perspective view showing the relation to the machine of the shoe under treatment. Figs. 7, 8, and 9 are detail views in side elevation showing the tack ulling and tack driving mechanism in di 'erent operative positions.

Referring more particularly to the drawings, A indicates the-pedestal of a nailing machine upon which is a nailing machine of any approved form. 1 indicates an arm suspended by a link 2 from a hanging part 3 of the frame of the nailing machine. 4 indicates an eccentric driven by the shaft 40 of the nailing machine and arranged to actuate the arm 1. 5 indicates the head of the nailing machine. 6 indicates the nozzle through which the nails are driven, and 7, the ham- This drawing of the lasting tacks and mer of the nailing machine; all the parts of the nailing machine are those commonly in use, except the nozzle which is slightly changed in form from the ordinary nozzle, by having the lower end of it cut slanting, at 8, with the point or lower part of the slant towards the rear of the nailing machine; the slanting face 8 of the tubular nozzle 6 en gages more closely and in a better way with some parts of the shoe than the ordinary square terminated nozzle. To the head 5 is bolted or otherwise secured a curved rest 9,

the lowerend of which (shown in detail in Fig. is slightly serrated and bent to engage with the inner sole, or bottom of the shoe under treatment, which when it is being treated, is pressed against this serrated lower end of the rest.

The arm 1 reciprocates and swings and is given by the compound action of the link 2 and the cam or eccentric 4 a forward and liftiii-g movement after which the forward end retracts and drops. The claw is inserted in a holder 11 provided with two bolt holes 12 and 13, in which bolts 14 and 15 engage; these bolts pass through vertically elongated holes 16 and 17in the front end of the arm 1, and the inclination of the claw with respect to the longitudinal direction of the arm 1, can be adjusted by varying the position of either or both of the bolts 14 and 15 in the holes 16 and 17. The claw 10 is provided with serrations which may be one or more, as shown in the variations illustrated. In the claw 10, two serrations or three claws are shown and in the claw 19, one serration or two claws are shown.

As herein shown the shaft 40 is provided with a toothed wheel 20, meshing with a gear 21, on a shaft 22, provided with a cam 23, op erating intermittingly a lever 24:, pivoted at 25 to the machine frame and connected at 26 to the upper end of the hammer 7. The shaft also has aworm 27 in engagement with a worm-wheel 28 for rotating a rod 29 connected at 30 to a-shaft 31 for o erating in well-known manner the tack fee ing mechanism, not shown, for maintaining the desired supply of stay-tacks traveling down the raceway 32 to the nozzle 8.

The claw is retracted until the extreme front end of it is slightly behind the nozzle 6 and advances and lifts until its extreme front end is nearly over the lower end of the rest 9, and in making this advance, it is lifted slightly and during the lift and forward motion pulls any tack that it may come in contact with.

The tubular nozzle 6 is utilized as a rest against which the shoe engages and which holds the shoe down when the tack is lifted, it is also utilized by the workman as a guard against which he can place the hand which is holding the shoe and serves perfectly to prevent the claw 10 from injuring the hand. The curved rest 9 is arranged in front of the nozzle and engages the shoe along the bottom, and it also serves to pre vent the shoe from rising,

The movement of the claw is orbital approaching to a four motion movement.

The rest 9 is important, if not in fact essential, to the accomplishment of the results practically, of the combination of parts which constitutes my invention, as the osition of this rest and its resistance to t e tack-pulling movement at the crit ical moment is what enables the machine to work accurately and rapidly. This rest constitutes a hold-fast that bears on the sole just ahead or in front of the tack-puller,

preventing the shoe from lifting up, but

not interfering in any way with the quick instant shifting of the shoe in whatever direction his experienced eye indicates is desirable in order to obtain the best results. Merely bringing together a tack driver and a tack-puller will not accomplish the de sired object, but they must be brought together in connection with the work rest and their operating parts in such manner that they are mutually dependent and so that each tends to modify or supplement the others, and the rest 9 tends'in a large measure to make this combination and cooperation of parts possible and practicable.

As already explained, as the tacks are pulled from a lasted shoe, it is desirable to redrive another set of tacks, fewer in number, and which are not driven fully into the last. These tacks are driven in order that the leather of the shoe may be retained in the place to which it has been previously drawn and to which it has been held by the tacks that are extracted. After the shoe has been once lasted and the leather has become set in place, a few tacks will hold it until the sewing of the welt is completed, but it is not desirable that at any time the lasted shoe should be left without any holding tacks, and therefore the few tacks required are driven contemporaneously with the pulling of the previously driven tacks by bringing the nailing machine into operation at the same time that the tack puller is in action, so that no displacement can occur, the skill and experience of the operator can be availed of, and the construction of the shoe expedited.

I have already explained how the rest 9 cooperates with the tack moving device and I wish it understood that, except as otherwise specified in the claims, I am not limited to the kind, extent or manner of moving the tacks or the particular tackmoving means employed.

What I claim is 1. A machine for operating upon lasted shoes, comprising a work rest for engaging the shoe when the latter is presented thereto by the operator, a tack driving device having a portion thereof in position to engage the bottom of said shoe opposite said rest at one side of the lasting-tack line of said shoe, and tack pulling mechanism having its pulling end cooperating with said rest and with said engaging portion to pull the lasting tacks from said shoe, said rest and engaging portion serving to resist the tack pulling thrusts of said pulling mechanism.

2. A machine for operating upon lasted shoes, comprising a tack driver having a hollow portion serving as a rest against which to hold and guide the shoe adjacent the lasting-tack line thereof, and means for driving stay tacks through said hollow portion into said shoe, tack pulling mechanism operating adjacent said tack driver for pulling said lasting tacks, and operating mechanism for said parts, said rest being in position to hold said shoe against the pulling movement of said tack-p ulling mechanism.

3. A machine for operating upon lasted shoes, including means for moving the lasting tacks, consisting of a reciprocating arm, means for giving the same an orbital 15 pulling movement, a claw in the forward end of said arm, and means for adjusting the inclination of said claw with respect to the longitudinal direction of said arm.

In testimony whereof, I, sign this specifi- 2o cation in the presence of two witnesses.

CHARLES F. PYM.

Witnesses:

CHARLES F. BURTON, ELLIOTT J. STODDARD.

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