US1029920A - Shoe-sewing machine. - Google Patents

Description

A. B. FOWLER.

SHOE SEWING MACHINE. APPLIOATIOH FILED APR. 8, 1909.

Patented June 18, 1912.

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A. B. FOWLER.

SHOE SEWING MACHINE.

APPLICATION FILED APR. 8, 1909.

1,029,920, Patented June 18, 1912.

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ALFRED LB. EowLER, or DUXBURY, MASSACHUSETTS, ASSIGNOR 'ro UNITED SHOE MACHINERY COMPANY, OF PATERsoN, NEW JERSEY, A-coRroRATIoN OF NEW JERSEY.

SHOE-SEWING MACHINE.

Original application filed January 13, 1902, Serial No. 89,585.

Specification of Letters Patent.

Patented June 18, 1912. Divided and this application filed April 8,

1909. Serial No. 488,597.

State of Massachusetts, have invented certain new and useful Improvements in Shoe- Sewing 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 an improvementin shoe sewing machines and more particularly to shoe sewing machines of the hook needle, wax thread, chain stitch type.

The object of my invention is to reorganize and improve sewing machines of the above type and to the above end the present invention consists in the devices and combinations of devices hereinafter described and claimed.

The present application is a division of my application for Letters Patent of the United States upon shoe sewing machines filed January 13, 1902, Serial No. 89,585.

In the accompanying drawings illustrating the preferred form of my invention Figure 1 is a front elevation of a sewing machine embodying my improvements; Fig. 2 is a side elevation looking toward the right hand end of Fig. 1, and Fig. 3 is a detail view hereinafter referred to.

I have illustrated my invention as embodied in a sewing machine of the Lincoln type in which the needle N is of the usual curved hook type supported in the usual needle segment and actuated in the usual way from the cam on the main shaft S of the machine. The looper L is of the rotary type, being mounted upon a hollow cylin der through which the thread passes and being actuated by a rack and pinion from a cam on the main shaft S in the usual manner. The back gage G and back rest R are mounted on the usual slides and operate in the usual manner. is mounted upon a pivot on the feed slide F and actuated in the usual manner by levers from cams mounted on the main shaft S.

The tension indicated in a general way by the reference letter T may be an ordinary tension wheel for applying a resistance feed point into the plane of the needle, feed point) a diagonal line sothat it is carried out of The channel guide C" to the pulling oif of thread from the supply and in its broader aspects my invention is not limited to any particular form of tension mechanism.

In sewing machines and particularly in those in which the looper is of the rotary type and which is therefore ordinarily re- .quired to make both a loopmg movementand a return movement to bring it back to its original position after having looped the thread in the hook of the needle, it has ,been found difiicult to arrange and operate the feed point 1n such manner as to give it its proper movements to feed the work and to return to its original position without interfering with the motions of thelooper, and according to the present invention the feed point A after having engaged the work and fed the same, preferably bringing the (the is withdrawn from the work on the plane of the needle, by virtue of which the retracting stroke of the feed point need 7 not necessarily be as long as it would otherwise require to be, and at the same time carried beyond the path of motion of the looper so that it will not interfere with the looping or returning movements thereof. In the illustrated embodiment of my invention I have shown the feed point A fixedly secured to the feed point arm 1 mounted upon and secured to the rock shaft 2, in

.turn revolubly and slidingly mounted in a bearing 3 on the feed slide F. Upon the opposite end of the rock shaft 2 is secured a cam 4t and segmental pinion 5 which in the illustrated embodiment are integral. The cam, for which see in particular Fig. 3, is provided with a diagonal groove which is engaged by a roll 6 mounted upon a stud 7 :secured to an adjustable support 8 provided with the adjusting slot 9 through which the cap bolt 10 passes, being screwed into a projection from the feed slide. The segmental pinion t is engaged by a segmental gear 11 pivoted upon astationary part of the machine and to which is secured the arm 12 carrying a cam roll which enters the cam path 13 in the cam disk D mounted upon and secured to the main shaft S of the machine. The above described arrangement and the shape of the cam path 13 are such that when the segmental gear 11 is held stationary by a dwell in the cam path 13 the reciprocations of the feed slide F will impart identical reciprocations to the channel guide C and feed point A, the feed slide F and the feed point A-being connected together by means of the cam 4 and roll 6. The cam path 13 is so constructed with relation to the feed cam for operating the feed slide that it will first cause the segmental gear 11 to be rotated in the direction to cause the feed point A to engage the material alongside of the channel guide. The dwell will then occur in the cam path 13 during the time the feed cam path is moving the feed slide and with it the channel guide and feed point in the direction to feed the work, whereupon the segmental gear 11 will be actuated by the cam path 13 to withdraw the feed point A from engagement with the work, the oscillation of the cam 4 at this time causing the rock shaft 2 to slide toward the right as viewed in Fig. 1 so that the motion of the feed point is upon a diagonal line which is the resultant of the two motions of sliding and rocking given to the rock shaft 2 by the cam 4: and segmental gear 11. By this means the feed point A is withdrawn from engagement with the work on a diagonal line out of the plane of the needle and beyond the path of motion of the looper. It is to be noted that the movement of the feed point A toward the work is also upon a diagonal line, because the oscillation of the rock shaft 2 to cause the feed point to engage the work necessarily causes it to be acted upon by the cam 41: so as to slide forward in the direction of the feed at the same time.

The above described feature of my invention by virtue of which the feed point is withdrawn from the work on a diagonal line out of the plane of the needle and beyond the path of motion of the looper is conveniently embodied in the mechanism hereinbefore described and illustrated in the accompanying drawings but, broadly considered, it is by no means limited to such embodiment thereof as the means for actuating the channel guide and feed point may be separate, as for instance the mechanism for actuating the channel guide and feed point may be separate or of any appropriate construction for obtaining this result.

I am aware that it has been proposed to mount the feed point on an axis perpendicular to the axis of the needle but oblique to a vertical plane so that the feed point is given a movement along a path oblique to the line of feed. The present construction, however, diifers essentially from such an arrangement in that the axis of oscillation of the feed point is parallel to the axis of oscillation of the needle and in that the feed point is caused to follow a path oblique to the line of feed by being given a combined bodily lateral and oscillating movement of which said path is the resultant.

Among other advantages obvious to those skilled in the art, the present construction is such that the relation between the oscillating and bodily movements of the feed point may be so timed by the constructor that the lateral movement of the feed point which takes it out of the path of the looper may be made to occur rapidly, and immediately after the feed point has been withdrawn from the stock so that the movement of the looper need not be delayed as it would have to be in machines in which the oscillatory movement of the feed point is depended upon to get it out of the way of the looper.

Having thus described my invention I claim as new and desire to secure by Letters Patent of the United States:

1. A chain stitch shoe sewing machine, having, in combination, an oscillating curved hook needle, a looper, a tension, an oscillating feed point having its axis of oscillation parallel to the axis of oscillation of the needle, a channel guide engaging the channel on the side of the feed point away from the needle and means for moving the feed point and channel guide while in engagement with the Work to feed the same and for moving said feed point away from the work while the channel guide is stationary in a diagonal line from a position within to a position beyond the path of motion of the looper, substantially as described.

2. A chain stitch shoe machine, having, in combination, an oscillating curved hook needle, a looper, a tension, an oscillating feed point having its axis of oscillation parallel to the axis of oscillation of the needle,

a channel guide engaging the channel on the side of the feed point away from the needle and means for imparting to the feed point a combined bodily lateral and oscillating movement while the channel guide is stationary to cause it to move away from the Work in a diagonal line from a position within to a position beyond the path of motion of the looper.

8. A chain stitch shoe sewing machine, having, in combination, a curved hook needle, a looper, a tension, a feed slide, a channel guide mounted on the feed slide and having a bodily lateral movement therewith, an oscillating feed point mounted upon and movable with the feed slide and having its axis of oscillation parallel to the axis of oscillation of the needle, and means -for imparting to said feed point a bodily lateral movement independent of the feed slide and an oscillating movement to move the feed point away from the work in a diagonal line from a position Within to a looper.

4. A chain stitch shoe sewing machine, having, in combination, an oscillating curved hook needle, a looper mounted to rotate alternately in opposite directions about a fixed axis, a tension, an oscillating feed point having its axis of oscillation parallel to the aXis of oscillation of the needle, a channel guide engaging the channel on the side of the feed point away from the needle and means for imparting to the feed point a combined bodily lateral and oscillating movement while the channel guide is stationary to cause it to move away from the work in a diagonal line from a position within to a position beyond the path of motion of the looper.

In testimony whereof I aflix my signature, in presence of two witnesses.

ALFRED B. FOWLER. Witnesses:

ALFRED H. HILDRETH, FRED O. FISH.

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

Washington, D. C.

It is hereby certified that in Letters Patent N 0. 1,029,920, granted June 18, 1912,

upon the application of Alfred B. Fowler, of Duxbury, Massachusetts, for an improvement in Shoe-Sewing Machines, errors appear in the printed specification requiring correction as follows: Page 1, line 39, first occurrence, for the article the read a; page 2, line 101, after the word shoe insert the Word sewing; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Oflice.

Signed and sealed this 16th day of July, A. D., 1912.

[SEAL] C. G. BILLINGS,

Acting Commissioner of Patents.

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