US652908A

US652908A - Stitch-separating machine.

Info

Publication number: US652908A
Application number: US1520700A
Authority: US
Inventors: John B Hadaway
Original assignee: Individual
Current assignee: Individual
Priority date: 1900-05-02
Filing date: 1900-05-02
Publication date: 1900-07-03
Anticipated expiration: 1917-07-03

Description

No. 652,908. Patented July 3, I900.

J. B. HADAWAY.

STITCH SEPARATING. MACHINE.

' (Application filed my 2, 1900.) (No Model.)

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No. 652,908. Patented July 3, I900.

.1. VB. HADAWAY.

STITCH SEPARATING MACHINE. (Application filed m 2, 1900.) (No Model.)

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No. 652,908. Patented July 3, l90.D.'

J. B. HADAWAY.

STITCH SEPABATING MACHINE.

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STITCH-SEPARATING MACHINE.

SPECIFICATION forming part of Letters Patent No. 652,908, dated July 3, 1900.

Application filed May 2, 1900. Serial No. 15,207. (No model.)

To aZZ whom it may concern:

Be it known that I, JOHN B. HADAWAY, a

citizen of the United States, residing at Brock-..

ton, in the county of Plymouth and State of Massachusetts,have invented certain new and useful Improvements in Stitch -Separating 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 improvements in stitch separating [machines or stitch separating and indenting machines, as they are sometimes called, and more particularly to that class of such machines by which the stitch-separating operation is performed after the seam has been finished.

The object of the present invention is to provide a simple and effective means of compensating for the slight variations in the length of stitches commonly found invboot and shoe work, so that the stitch-separating tool will" accurately indent the intervals between the.

stitches whether of varying or uniform length. While I am aware that it is not broadly new to provide for such compensation, such provision having been made in several machines heretofore patented by me, I have by my present invention produced a simple and effective means of securing this result which greatly reduces the cost of machines of this class without impairing their efficiency.

'T0 the above end the present invention consists of the devices and combinations of devices hereinafter set forth and claimed.

A preferred form of my present invention is illustrated in the accompanying drawings, in which- Figure 1 is a side elevation of a machine embodying the same. Fig. 2 is a front end elevation, and Fig. 3 is an elevation of a portion of the mechanism for actuating the feed.

In carrying out my present invention I provide a stitch-separatingtool which has a fixed path of movement ,to and .from the work to be operated "upon, soas to always act upon as to allow the indenting-tool in acting on the stitches to shift the work backward or forwardto compensate for variations in the length of the stitches. To allow of this shifting action, I provide a feeding mechanism which may engage the work with sufficientv ing roll, to the shaft of which is secured a grooved friction driving-disk. With this disk cooperates a suitable friction-pawl, whereby the feed-roll, and consequently the frictiondisk, may be shifted either backward or forward independently of the pawl without in-:

terfering with the proper action of the pawl in turning the feed-wheel uniform distances.

As shown in the drawings, in which like reference characters indicate like parts, the frame of the machine consists of the base A and the two uprights A and A 13 is the main shaft, journaled at the top of I the-uprights A A and provided with the fast and loose pulleys B B Reciprocating in fixed guidewaysin the upright A is the toolcarrying slide 0. This slide is reciprocated by a crank-pin c at the end of the shaft B engaging a slot 0 in the slide. The stitch separating or indenting tool D is secured tothe lower end of the slide 0, so as to be capable of vertical adjustment, by meansof the screw-.

bolt (1, passing through a vertical slot d in the shank of the tool.

Directly beneath the reciprocating tool D is the work supporting and feeding roll E, secured by a screwe to a feed-shaft F. This shaft is journaled in a block F, pivoted at F in an opening inthe lowerpart ofithe upright A and adapted to swing vertically in an opening in the; upright A. The block F.

is held yieldingly against an adjustable stop F on the upright A by means of the coilspring F situated in the opening in the upright A and beneath the free end of the block. The upper end of this spring is seated in a recess formed in the lower part of the free end of the block F, and its lower end rests 011 the shoulder of a block carried by a vertical adj Listing-screw F Situated just above the roll E and extending from a lug on the upright A to the proximity of and slightly beyond the working edge of the tool D is a combined gage and upper guard II, which will be more particularly described hereinafter. This part H is secured to a lug of the upright A by means of a screw-bolt, as shown.

East on the end of the shaft- F opposite to the roll E is the disk I, the periphery of which is formed with a V-shaped groove. Coacting with this grooved disk is a friction-pawl mechanism comprising a lever 11, loosely pivoted on the shaft F and having pivoted thereto the friction-pawl i. This pawl is provided with a V-shaped end, which is adapted to engage the correspondingly-shaped groove of the disk I and is pressed into engagement with the disk by the spring 2' secured to the lever t' and bearing upon the upper side of the pawl. The lever i is oscillated in order to give the requisite feed movements to the disk I by means of a rod 2' connected at one end to the outer end of the lever iand at its opposite end provided with a strap surrounding an cecentric 2' on the mainshaft. pawl-and-ratchetmechanism is designed to move the feed-roll forward intermittently uniform distances corresponding to the normal length of the stitches in the work being operated upon, and in order to adjust the distance through which the feed-roll is moved in each feeding movement to correspond with the different lengths of stitches found in different styles of workas, for instance, in shoes of different sizesI provide an adj ustable connection between the lever t' and the rod i As shown, this connection consists of a pin t passing through a slot 6 in the outer end of the lever '5, held in adjusted position by means of the screw-nut i and forming a pivot for the end of the rod 2' The rod i is held upon the pin between a flange i on the pin and an end washer t.

t is apointer carried by the end of the rod 2' and moving over a scale on the lever 'i to indicate the kind of work for which the feed-operating devices are adjusted.

It will be noted that the peripheral surface of the roll E is at an angle to the axis of the roll and that the lower surface of the part II is substantially parallel with this axis. By reason of this construction the part II acts as a gage for the work on the roll E and properly positions it with relation to the separating-tool D. As stated above, the part H extends slightly beyond the tool D and so acts as a guard for the upper of a shoe being operated upon by preventing the upper pass ing beneath the tool.

This frictional In the operation of the machine the roll E I is first adjusted by means of the adjustingstop I to the' proper distance below the gage II. The proper position for the roll E willbe determined by the thickness of the shoe-sole being operated upon and by the distance to which the sole extends beyond the upper. The actuating devices of the feed mechanism having been adjusted to give the length of feed required, the workman places the shoe the stitches of which are to be indented upon the roll E, as shown in Fig. 1, the bottom of the sole engaging the feed-roll and the sole being properly positioned under the separating-tool D by the gage-plate II. The shoe is held upon the roll E and properly guided by the workman during the indenting operation. So long as there are no irregularities in the stitches it will be evident that the movements given to the feed-roll E by its actuating mechanism will properly position the work beneath the tool D at each feeding operation. Should, however, irregularities occur, the work will not be properly positioned and the tool will strike to one side of the space between the stitches. In such case it is necessary that the work be shifted by the action of the tool on the stitches, and this is provided for in my present invention by the novel construction and arrangement of my feeding mechanism and actuating devices. It will be noted that my feeding mechanism engages the bottom of the sole only and that by reason of its frictional engagement therewith the sole can be made to slip over the engaging surface under the action of the indenting-tool on the stitches. I may rely on this slipping action alone or I may so arrange the feeding mechanism with relation to its actuating devices as to allow a movement of the feed mechanism with the work under the action of the tool on the stitches independently of the feed-mechanism-actuating devices or Imay combine these methods of operation. The apparatus shown in the drawings and described above may be so constructed as to act in any one of these three ways.

It will be seen that the feeding-roll E is always free to move forward independently of its actuating devices and that it is free to move backward during the return stroke of the lever i. It will also be seen that the actuating devices will act to move the feed-roll uniform distances after the feed-roll has been shifted in either direction. Preferably I so arrange the actuating devices of the feed mechanism with relation to the mechanism for actuating the separating-tool as to cause the indenting action to take place while the feed mechanism is free from its actuating devices. I may, however, cause the indenting action to take place at the end of the feed movement and while the feed mechanism is still engaged by its actuating devices. In such case the feed mechanism would move forward with the work in compensating for a long stitch; but the work wouldslip backward through the feed mechanism in compensating for a short stitch. It will, moreover, be evident that the feed mechanism might be mounted with sufficient friction to cause the work to slip when moved by the action of the separating-tool on the stitches instead of actuating the feed mechanism.

Having thus described my invention andexplained the operation thereof, what I claim, and desire to secure by Letters Patent, is-

1. A stitch-separating machine, having, in combination, a stitch-separating tool, a feeding device acting on the bottom of the sole anism for actuating the tool, substantially as described.

3. A stitch-separating machine, having, in combination, a feed-roll, movable in either direction by the action of the tool on the stitches, mechanism for actuating the feedroll to feed the sole uniform distances, having provision for releasing it to permit its movement by the separating-tool, and mechanism for actuating the tool, substantially as described.

4. A stitch-separating machine, having, in combination, a stitch-separating tool, a feeding device in constant engagement with the work arranged to permit the work to be moved in either direction by the action of the tool on the stitches, mechanism to actuate the feed to cause it to feed thework uniform distances, and mechanism to actuate the separating-tool, substantially as described.

In testimony whereof I affix my signature in presence of two Witnesses.

JOHN B. HADAWAY. Witnesses:

HORACE VAN EVEREN, ALFRED H. HILDRETH.