US1308608A - Planoohaph co - Google Patents

Description

7 L. ONDERDONK. incur EDGING MACHINE;

APPLICATION FILED MAY 24. 1916.

EETSSH I.

Patented Jul 1 .1919.

L. ONDERDONK.

PICOT EDGING MACHINE.

APPLICATION FILED MAY 24- WW.

1,308,608. Patented July 1, 1919;

5 SHEETS-SHEET 2.

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L. ONDERDONKf PICOT EDGINQ MACHINE. APPLICATION FILED MAY24.1916.

1,308,608. Patented July 1, 1919.

5 SHEETS-SHEET 3.

- rm: COLUMBIA PLANOGRAPH $0.. WASHINGTON, D. C.

L. ONDERDONK.

PICOT EDGING MACHINE.

APPLICATION FILED MAY 24. ms.

Patented July 1, 1919.

5 SHEETS-SHEET 4.

2 ifm' THB COLUMBIA PLANOGRAPII C0" WASHINGTON, D. C.

L. ONDERDONK.

PICOT EDGING MACHINE.

APPLICATION FILED MAY 24. 1916.

1,308,608. Patented July 1, 1919.

5 SHEETS-SHEET 5.

rm! COLUMBIA PLANOURAPH Cm, WASHINGTON. n. c.

UNITED, STATES PATENT OFFICE.

LANSING ONIDERDONK, on NEW YORK, N. Y., AssIGNoI To UNIoN SPECIAL MACHINE COMPANY, or CHICAGO, ILLINOIS, A CORPORATION or ILLINOIS.

PICOT-EDGING MACHINE.

Specification of Letters Patent.

Patented July 1, 1919.

Application filed May 24, 1916. Serial No. 99,621.

ing for a fabric.

An object of the invention is to provide means cooperating with the stitch forming mechanism for forming at pie-determined intervals picot loops.

A further object of the invention is to provide a machine of the above character wherein the means for forming the picot loops hold the loop until the stitches are set, thus insuring that each loop shall be of a 'pre-determined size.

These and other objects will in part be obvious and will in part be hereinafter more fully disclosed.

In the drawings, which show by way of illustration one embodiment'of the invention:

Figure 1 is a view, partly in front elevation and partly in section, showing a portion of a. sewing machine having my improvements applied thereto;

Fig. 2 is a transverse sectional view, through the parts beneath the work support; also showing the needle and the needle bar, the section being taken at one side of the feed bar;

Fig. 3 is a transverse sectional view, through the parts beneath the work support; also showing the needle and. the neeclle bar, the view showing the mechanism for forming the picot loops in side elevation;

Fig. 4 is a View similar to Fig. 3,but showing the parts in a diiferent position;

Fig. 5 is a plan View of the parts beneath the work support, and also showing the needle in section;

Fig. i 6 is a view showing more or less diagrammatically the needle, the looper, the

spreader and the picot loop-forming device at the time when said loop forming device 1s entering the needle loop; I

Fig. 7 is a view, similar to Fig. 6, but showing the stitches set and the picot loop drawn down against the holding device therefor Fig. 8 is a bottom plan view of the fabric;

9 is a view, similar to Fig. 6, but showing a slightly modified form of the invention, wherein the picot loops are formed from the looper thread between stitches; and

Fig.10 is a view, similar to Fig. 9, but showing a further modified form of the invention wherein the picot loops are formed from a looper thread carried by the under looper.

In carrying out my invention, I have provided a sewing machine having stitch-forming mechanism for forming from the stitching threads an edging for a fabric and with a device which intermittently engages one of the stitching threads for holding the same in extended loops, thus forming picot loops. As shown in the drawings, the

stitch forming mechanism and the picot loop forming device engages the needle loop and holds the same extended' Said picot loop-forming device is timed to operate at every third stitch. Referring more in detail to the drawmgs:

I have shown my invention as applied to a sewing machine havmg a supporting bed 1 which carries a standard 2 formed with an overhanging arm 3. Reciprocating in the overhanging arm is a needle bar 4 carrying a needle 5. The needle bar is reciprocated by a needle lever 6 which isconnected by a link 7 to the needle bar. Said needle lever is pivoted at 8 to the standard 2 and is oscillated by an eccentric strap 9 which cooperates with an eccentric on the main shaft 10. Cooperating with the needle beneath the work support is a spreader 11 which is mounted in a spreader carrier 12 pivoted at 13' to a supporting bracket 14. Said spreader carrier '12 is oscillated by a link 15 which is connected to a rock lever 16 pivoted at 17 to the standard 2. Said rock lever 16 is connected by a link 18 with a needle lever extension 19. Also cooperat- 24. This link 24 is also connected to a crank 25 on the main shaft 10.

The material is fed tothe stitching mechanism by a feed dog 26 which is carried by- The above parts are of the usual construe.

tion in the well-known Union Special overseamingmachineand will not need further description. It will be understood that the needle passes through the fabric adjacent the edge, the Spreader 11 moves forward and engages theneedle loop and carries it to the edge of the fabric, while the threaded looper 20 moves through the needle loop to a position above the material where the thread loop of said looper is positioned for the entrance of the needle.

Cooperating with the stitch formingmechanism above described is a loopholding mechanism which consists of a loop-holding hook 30. This loop-holding hook 30-is adjustably mounted in a supporting head 31- carried by a bar 32 (see Figs. 2,3 and-4). Said hook is clamped to the head 31 by a set-screw 33. The bar 32 is mounted so as to reciprocate freely in a sleeve 34 which is pivoted at 35 to the housing or bracket 36 (see Fig. 5). The sleeve 34 has a rearwardly projecting arm 37 which is pivoted at 38 to an eccentric strap 39. The eccentric strap 39 cooperates with an eccentric 40 attached to a gear wheel 41. The gear wheel 41 is mounted to rotate freely on a suppo-rting bearing 42 which is secured to the housmg or bracket 36. Said gear wheel 41 is rotated by a gear wheel 43 mounted on the main shaft 1.0. At the upper end of the ec-' centric strap. 39 there is a pin 44 whichis secured to the eccentric strap-so-that it may be adjusted longitudinally thereof. Said pin has a shoulder which is clamped against the eccentric strap by a holding nut 45 and the eccentric strap is slotted so as to permit this pin 44 to be adjusted toward and from the eccentric40. The rod 32 is provided with a cross head 46 which engages the pin 44.

As the main shaft rotates, the eccentric 40 will be rotated, and this will oscillate the eccentric strap. about the pivotal connection 38 between the arm 37 and the eccentric strap. As the eccentricstrap oscillates, the

pin 44 will be moved back and forth, that is,

to the right and to the left of the position shown in Fig. 4, and this will move the rod 32 endwise in the sleeve 34. The eccentric 40 will not only oscillate the eccentric strap 39, but will move the same endwise as said eccentric oscillates from the position shown in Figs. 2 and 3 to the position shown in Fig. 4. This endwise movement of the eccentric strap oscillates the sleeve 34 about In Fig. 6 of the drawings, I have shown diagrammatically a fabric, indicated at F, in which a series of stitches have been formed consisting of a needle thread it which is concatenated with a looper thread Z. The needle passes down through the fabric and the spreader 11 engages the needle loop and carries the same outward beyond the edge of the fabric to a position so that the looper 20 may pass through the needle loop, carrying the looper thread in loo-p form from the-edge of the fabric into a position for the needle 5 to enter. In Fig. 6, the spreader is at the extreme end of its movement and is holding the needle loop which is indicated at a; The spreader is'at the extreme forward end of its stroke and the looper is about to enter into the loop formed by the looper which is indicated at Z. The picot loopforming hook .30 is so timed that, when at the forward end of its stroke and on its downward movement, it will enter the needle loop n. The gear wheel 41 is larger than the gear wheel 43 so that, as shown in the drawings, the gear wheel 41 moves one complete rotation to every three complete rotations ofthe main shaft 10. Therefore,

i at every third reciprocation; of the needle,

threads, and set the stitch, after which the hook will move upward and release the picot loop.

When the parts are timed as shown in the drawings, a picot loop, that is, a loop lying in the plane of thefabric and projecting beyond the edge of the fabric and the other loops of the overseaming stitching, will be formed at every third stitc'h or reciprocation of theneedle. It will be apparent that the gear .Wl1e8ls 41 and 43 may be readily re moved, and gear wheels of different sizes substituted therefor, so as to change the timing of the picot loop-forming hook and picot loops may be formed at every second stitch,

or every fourth stitch or any desired number of stitches.

In Fig. 9 of the drawings, I have shown diagrammatically a stitch forming mechanism of the character above described, but in this instance the holding hook 30 is timed and positionedso as to engage the looper thread between stitches instead of engaging,

I tneneedle thread loop. In this form of the invention, the picot loop is formed from the looper thread and maybe formed at any deing hook in this instance is timed and positioned so.as to engage the looper thread formed by the under looper 4:7 and the picot loop is formed in the thread 8.

The eccentric 40 is adjustably connected to the gear wheel 41 so that the throw of the eccentric may be slightly varied for changing the timing of the picot loop-forming hook 30. Also by adjusting the pin 44, the back and forth movement of the hook may be further varied. Through the set-screw 33 the position of the hook on the supporting head may be varied. These adjustments assist in operatively positioning the hook so as to bring about the cooperative action and timing above referred to. It is understood that in order to change the time of making the picot loop from one stitch to another would, however, require the changing of the gears.

It will also be noted that the timing of the small gear 43 on the shaft 10 either forward or backward can be readily accomplished, and this change in the timing of the gear will result in changing the timing of the hook forming the loop so as to properly cause the hook to engage the threads for making the picot loops.

It is obvious that minor changes in the details of construction and the arrangements of parts may be made without departing from the spirit of the invention, as set forth in the appended claims.

Having thus described the invention, what is claimed as new is r 1. A sewing machine including in combination a work support, a needle, a looper cooperating with the needle beneath the work support, a second looper cooperating with the first named looper and with the needle above the work support, whereby over edge stitches are formed and means cooperating with the stitch forming mechanism for forming from one of the stitching threads picot loops.

2. A sewing machine including in combination a work support, a needle, a looper cooperating with the needle beneath the work support, a second looper cooperating with the first named looper and with the needle above the work upport, whereby over edge stitches are formed, a loop holding hook and means for operating the same to engage one This threaded of the stitching threads and forming a loop therein which projects beyond the edge of the fabric.

3. A sewing machine including in combination a work support, a needle, a looper cooperating with the needle beneath the worksupport, a second looper cooperating with the first named looper and with the needle above the work support, whereby over edge stitches are formed, a loop holding hook and means for operating said holding hook to cause the same to engage and form a loop in one of the stitching threads at predetermined intervals of two or more stitches.

4. A sewing machine including in combination, over-edge stitch forming mechanism including a needle, complemental stitch forming devices, a loop-holding hook, and means for operating said loop-holding hook for engaging the needle thread loop and holding the same extended at predetermined intervals to form picot loops.

5. A sewing machine including in combination, over-edge stitch forming mechanism including a needle and complemental stitch forming devices, a holding hook, and means for operating said holding hook to engage the needle loop and hold the same extended beyond the edge of the fabric at predetermined intervals of two or more stitches to form picot loops.

6. A sewing machine including in combination, over-edge stitch forming mechanism, a loop holding hook cooperating therewith to form picot loops, a supporting bar for said hook, means for oscillating said bar and for moving the same endwise for causing the hook to engage one of the stitching threads at predetermined intervals.

7. A sewing machine including in combination, over-edge stitch forming mechanism, a hook cooperating therewith to form picot loops, a bar supporting said hook, a sleeve within which said bar reciprocates, and means for oscillating said sleeve.

8. A sewing machine including in combination, over-edge, stitch forming mechanism, a hook cooperating therewith to form picot loops, a bar supporting said hook, a sleeve within which said bar reciprocates, an eccentric, an eccentric strap connected to said sleeve and to said bar to oscillate said sleeve and for reciprocating the bar in said sleeve.

9. A sewing machine including in combination, over-edge stitch forming mechanism, a hook cooperating therewith to form picot loops, a bar supporting said hook, a sleeve within which said bar reciprocates, an eccentric, an eccentric strap, a pin carried by said eccentric strap, a slotted cross head carried by the bar and engaging said pin, an arm carried by the sleeve and pivoted to said eccentric strap between the eccentric and the pin.

10. A sewing machine including in combination, a main shaft, a needle, means for retrici oncefor every three rotations of the 10 ciprocating the needle, means cooperating main shaft.

with the needle to form over-edge stitches, In testimony whereof I aflix my'signatu-re a holding hook, a supporting bar for said in thepresence of two Witnesses.

holdin hook an eccentric an eccentric stra operat d the reby, means operated by th l LANSING ONDERDONK" eccentric strap for oscillating the bar and Witnesses:

moving the bar endWise, and means operated JOHN H. HOWELL,

from the main shaft for rotating the eccen- MATTHEW P. RYAN.

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

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