US1030886A - Tack-pulling machine. - Google Patents

Description

J. B. HADAWAY. TACK PULLING MAGHINB. APPLICATION FILED MAR. 1, 1911.

Patented July 2, 1912.

2 SHEETSSHEET 1.

lglnes s'es- COLUMBIA PLANMRAPH co.. WASHINGTON, D. c.

J. B. HADAWAY.

TAGK PULLING MACHINE.

' APPLIOATION IILBD MAR. 1. 1911.

1 ,030,886. Patented July 2, 1912.

2 SHEETSSHBET 2.

wines-Sesa- COLUMBIA PLANonRAPM co, WASHINGTON, D- r:v

TE STATES PATENT OFFICE.

JOHN B. HADAWAY, OF SWAMPSCOTT, MASSACHUSETTS, ASSIGNOR 'IO UNITED SHOE MACHINERY COMPANY, OF PA'IERSON,

JERSEY.

Application filed March 1,

To all whom it may concern:

Be it known that I, JOHN B. HADAWAY, a citizen of the United States, residing at Swampscott, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Tack- Iulling Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to tack pulling machines, and more particularly to' a tack pulling machine which is employed for partially pulling the lasting tacks, or other temporary fastenings, which are inserted during the manufacture of shoes.

The principal object of the present invention is to provide an improved machine for partially pulling or lifting tacks or other fastenings a certain predetermined amount.

A further object of the invention is to enable the amount which the tack is lifted to be varied with accuracy and precision.

With these ends in view, a feature of the invention contemplates the provision of a pair of tack gripping jaws which are automatically actuated to grasp the tack and hold it firmly in a fixed position, and in connection with these jaws, a mechanism which operatively engages with the shoe and moves the shoe relat-ivelyto the tack.

A further feature of the invention consists in providing for an adjustment of the mechanism in order to vary the extent of the relative movement of the shoe and tack gripping jaws, and consequently the amount which the tack is lifted.

In the accompanying drawings illustrating the preferred form of the invention, Figure 1 represents a side elevation of the machine looking at the same from the right-hand side, and showing the plunger in its retracted position; Fig. 2 elevation of the machine; Fig. 3 is a view similar to Fig. 1 and showing the plungerin its advanced position; and Fig. 4: is a side elevation of the machine looking at the same from the left-hand side and showing the plunger retracted and the jaws opened.

In the illustrated embodiment of the invention, the machine comprises a pair of tack gripping jaws which are arranged to engage with the head of a lasting tack and hold it in a fixed position, and means ar Specification of Letters Patent.

is a front end NEW JERSEY, A CORPORATION OF NEW TACK-PULLING MACHINE.

Patented July 2, 1912.

1911. Serial No. 611,740.

ranged to operatively engage with the shoe and force the shoe away from the tack gripplng jaws while the tack is held in a fixed position. One only of the tack gripping jaws is movable and this jaw is operated by the same cam which serves to move the shoe. The otherjaw is stationary and cooperates with the movable tack gripping jaw to engage and hold a tack. The tack gripping jaws are indicated at 1 and 2 and are arranged with their work engaging faces inclined in order that the tacks may be conveniently presented between them. The jaw 1 is detachably supported upon a projecting bracket 1 mounted upon the main frame 5 of the machine and is retained in position by a set screw 6. In order to avoid any turning or twisting of the jaw relatively to the bracket, the jaw is provided with a dovetailed face engaging with a corresponding face formed upon the bracket. The jaw 2 is mounted upon the lower end of a curved arm 7 which is pivoted centrally at 8 to the frame of the machine, and which is oscillated automatically to move the jaw 2 toward and from the jaw 1 at the proper intervals. The jaw 2 is provided with a dovetailed. face engaging with a corresponding face formed upon the lower end of the arm.

7, and is retained in position by a set screw 9. The proper oscillatory movement is imparted to the arm 7 by a rotary path cam 10 which is mounted upon the main drive shaft 11 journaled in the frame 5. The drive shaft 11 is continuously rotated by a drive pulley 12 connected to any convenient source of motive power. The arm 7 is operatively connected to the path cam 10 by a cam roll 13 which is journaled upon the end of the arm. During the time that the jaws 1 and 2 are open, the head of a tack is inserted between the jaws which then close automatically to engage with and hold the tack in a fixed position. The tack is partially pulled by holding it in this position and moving the shoe relatively to the tack. To this end, a shoe engaging plunger 14 is provided which moves normally to the plane of the jaws into contact with the bottom of the shoe. The plunger is adjustably held in a head 15 formed upon the free end of an arm 16 and is arranged to engage with the shoe adjacent to the tack. The arm 16 is pivoted at its opposite end to the frame of the machine and in order to rock the arm andactuate the plunger a link 17 is connected midway 'of the arm and is fastened at its opposite end to a slide block 18. The block 18 is slidingly mounted upon a horizontal rod 19 supported at its opposite ends in the bracket 4; and retained in position by a set screw 20. The slide block is moved longitudinally of the rod in order to rock the arm 16 by a cam roll 21 which is journaled upon the block and engages with the path cam 10. The arrangement of the cam rolls 13 and 21 and the timing of the path cam 10 is such that the jaws l and 2 are first opened while the plunger 14L is held in its raised position. The jaws are then closed and while held in this position the plunger is forced downwardly in order to partially pull the tack. The jaws are then opened and the tack is released. In order to vary the extent of movement of the shoe, and consequently the amount which the tack is lifted, the shoe engaging plunger 14, as stated previously, is adjustably mounted in the head 15 and is retained in any adjusted position by a set screw 22.

While it is preferred to employ the spe' cific construction and arrangement of parts shown and described, it will be understood that this construction and arrangement is not essential except so far as specified in the claims, and may be changed and modified without departing from the broader features of the invention. V

The preferred form of theinvention having been described, what isclaimed is 1. A tack pulling machine having, in com-.

bination, means for grasping the tack and holding it' in a fixed position, and means for positively moving the shoe while the tack is held in order to partially pull the tack, substantially as described.

2. A tack pulling machine having, in com bination, means for grasping the tack and holding it in a fixed position, and means arrangedto move the shoe whilethe tack is held, the latter means having provision for adjustmentin order to vary the extent of movement of the shoe, substantially as described.

3. A tack pulling machine having, in com bination, tack gripping jaws, a shoe-engaging plunger, and power actuated mechanism for moving the plunger relatively to the jaws in order to force the shoe away from the jaws and lift the tack, substantially as described.

i. A tack pulling machine having, in combination, a pair of tack gripping jaws, means arranged to close the jaws upon a tack while the shoe is held stationary, and a plunger arranged to engage with the shoe and move the shoe away from the jaws when the jaws are closed in order to lift the tack, substantially as described.

5. A tack pulling machine, having, in combination, a pair of tack gripping jaws, a shoeengaging plunger, and a cam arranged to open and close the jaws and to move the plunger relatively to the jaws in order to lift the tack, substantially as described.

6. A tack pulling machine having, in combination, a stationary tack gripping jaw, a movable tack grippingj aw cooperating there with, a shoe-engaging plunger supported ad- 7 j acent to the jaws, and a single cam arranged to actuate the plunger and movable tack gripping jaw, substantially as described.

7. A tack pulling machine having, in com bination, movable tack gripping jaw, an arm supporting the movable jaw, a path cam, operative connections between the arm and path cam arranged to oscillate the arm, and a shoeengaging plunger operatively connected to the path cam, substantially as described.

8. A tack pulling machine having, in combination, a pair of tack gripping jaws, a pivoted arm, a shoe-engaging plunger supported upon the free end of the arm, a slide block, link connections between the slide block and central portion of the arm, a path cam, and operative connections between the slide block and path cam, substantially as described.

I JOHN B. HADAWAY. Witnesses:

GHns'rnR E. RoeERs, LAURA M. Goonnmen.

Copies of this patent mav be obtained for five 'cents each, by addressing the Commissioner of Patents,

I a Washington, D. G. 7 V

a stationary tack gripping jaw, a' 7

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