US1353837A

US1353837A - Sewing-machine

Info

Publication number: US1353837A
Application number: US117243A
Authority: US
Inventors: George S Hill
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1916-08-28
Filing date: 1916-08-28
Publication date: 1920-09-28
Anticipated expiration: 1937-09-28

Description

G. S. HILL.

SEWING MACHINE. APPLICATION FILED Aue.2-a. 1916.

Patented Sept. 28,1920.

3 SHEETS-SHEET l.

G. S. HILL.

SEWING MACHINE.

APFLICATIQN FlLED-AUG.28, I916.

Patented Sept. 28, 1920..

' 3 SHEETS.SHEET 2.

G. S. HILL.

SEWING MACHINE.

, APPLICATION FILED AUG-28, I9l6.

1,353,837, Patented Sept 28,1920.

3 SHEETS-SHEET 3- I\\\\ 14- I, 16 I i UITED srAEs' PATENT OFFICE.

GEORGE HILL, OF STRAFFORD, NEW HAMPSHIRE, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO UNITED SHOE MACHINERY CORPORATION, OF PATERSON, NEW JERSEY,

-A CORPORATION OF NEW JERSEY.

SEWING-MACHINE.

Application filed August 28, 1916.

T 0 all whom it may concern:

Be it known that I, GEORGE S. HILL, a citizen of the United States, residing at Strafford, in the county of Strafi'ord and State of New Hampshire, have invented certain new and useful Improvements in 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 invention relates to machines for sewing overseams.

The object of the invention is to provide novel and improved looper and loop spreader mechanism for cooperating with the vertically reciprocating needle or needles of the sewing mechanism, which will operate in a uniformly reliable manner, and which is well adapted for high speed operation. T 0 this end the invention comprises the features of construction and combinations of parts hereinafter described and referred to in the claims, the advantages of which will be apparent to those skilled in the art from the following detailed description of the mechanisms shown in the accompanying drawings which embody the preferred form of the invention.

In the drawings Figure 1 is a sectional elevation showing so much of a buttonhole sewing machine as is necessary to illustrate the application of the present invention thereto; Fig. 2 is a transverse sectional elevation on line 2, Fig. 1; Fig. 3 is a detail plan view of the turret which carries the under sewing mechanism; Fig. 1 is a sectional view on line 4, Fig. 3; Figs. 5 to '12 are diagrammatic views showing the mode of operation in forming the overseam stitches; and 'Fig. 13 is a detail sectional view on line 13, Fig. 6.

In the drawings th'e'invention is shown embodied in a buttonhole making machine having the same general construction and mode of operation as the machine shown and described in application Serial No. 104,449, filed June 19, 1916. The machine comprises in general a cutter which operates to cut the buttonhole slit after the completion of the sewing, a reciprocating and laterally. moving work clamp, and a sewing mechanism which is rotated during the sewing about the eye of the buttonhole, and

' Specification of Letters Patent.

Patented Sept. 28, 1920.

Serial No. 117,243.

which comprises a vertically reciprocating and laterally vibrating or jogging upper needle and cooperating looping and loop spreading devices arranged below the work and including a threadcarrying looper.

In the machine shown the work clamps indicated at 2 are mounted uponwork supporting plates 4 which are pivotally connected with a longitudinally and laterally moving clamp carriage 6. The clamps are automatically closed at the beginning of the sewing, and are automatically opened after the completion of the buttonhole, by mechanism which forms no part of the pres ent invention, and which need not be described. The buttonhole slit is out after the completion of the sewing by a cutter 8 operated by a cam on the main cam shaft of the machine.

In the-embodiment of the invention shown the sewing mechanism is adapted to form the well-known Humphrey stitch, and comprises a vertically reciprocating and laterally jogging upper needle 10, a reciprocating and laterally moving thread carrying looper 12, an alternately acting reciprocating looper 14, and a laterally movable loop spreader 16 reciprocating with the loopers and acting to spread the loop taken by the looper 14. The mode of operation of these devicesin forming the overseam stitches is illustrated in Figs. 5 to 12. During the depth stroke of the needle, the support or carrier on which the loopers and loop spreader are mounted, is moved in a direction to retract the thread carrying looper 12, and to-project the end of the looper 14 and the overlying spreaderpoint 16 through a needle loop thrown out by the needle as it starts upward from. its lowest position. This loop is carried toward the left by the looper 141 into the position indicated in Fig. 5, "and as it is carried intothis position the spreader point 16 is moved transversely of the direction of travel of the looper to spread the loop, as indicated in Fig. (3, so that during the slit or edge stroke of the needle it will pass down through the loop of upper thread. After the needle has entered the loop the carrier is moved toward the right to withdraw the looper 14 and spreader point 16 from the loop, and to advance the thread carrying looper 12, the spreader point returning into position above the looper, as indicated in Figs. 7 and 8. The continued movement of the carrier toward the right carries the thread carrying looper 12 through the loop of needle thread, as indicated in Figs. 9 and 10, after which the needle is retracted. After the thread carrying looper has carried its thread through the loop of the needle thread it is moved laterally across the needle path, and presents its loop in position for the passage of the needle therethrough during its next depth stroke, as indicated in Fig. :12. In order to secure an adequate spreading of the looper loop, it is preferred to provide the looper with a lateral projection 18 back of its thread eye. This projection counteracts or partially counteracts the effect of the lateral movement of the looper upon the loop of needle thread through which it is passed, so that the side of the needle loop against which the looper thread draws in passing from the eye of the looper to the seam is held in such position that the proper space between the looper thread and the side of the looper is provided for insuring the passage of the needle through the loop of looper thread. After the needle has passed through the loop of looper thread, the carrier is again moved toward the left to withdraw the thread carrying looper and again advance the looper 14 and spreader point 16 to take a loop of the ,upper thread from the needle, spread it, and present it in position for the passage of the needle during its next slit stroke. Prior to its next advance movement the thread carrying looper is moved laterally into position 'to pass on the front side of the needle and through the needle loop, as above described.

Any suitable construction for giving the looper and loop spreader the movements de scribed may be employed, but it is preferred to employ the construction shown, or a similar construction, since this enables the parts to be operated at high speed, and is also Well adapted for use ina machine in which the loopers and spreader are mounted upon a rotary turret. In the construction shown the looper point 14 is secured in the arm 20 of a carrier 22 which is provided with two bearings mounted to turn on the inner ends,

of studs 24 which are secured in lugs projecting from the upper edge of the rotary turret 26. The spreader point 16 and thread carrying looper 12 are secured in the ends of two arms of a carrier lever 28 which is mounted on a pivot 30 on the carrier 22, arranged at right angles to the axis of the carrier and between the ends of the carrier pivot studs 24. The lever is provided with a horizontal arm arranged substantially in the axis of the carrier 22, and having. its outer end connected by a ball and socket joint to the u per end of a tubular link 32, the lower em of which is connected by a ball joint to the forward end of a lever 34 through which the lever is rocked to give the spreader point and thread carrying looper the lateral movements above described. The carrier 22 is oscillated to advance and retract the loopers and loop spreader. through a lever 36 connected with the carrier through a tubular link' 38, the lower end of which is connected with the lever by a ball joint, and the upper end of which is pivotally connected at 40 with the carrier.

The-lever 36 is rocked by a three-corneredeccentric 42 secured to the sewingshaft at, and engaging a fork on the upper end of the link 46, the lower end of which is connected to the lever. The lever 34 is rocked to oscillate the carrier lever 28 during the movement of the carrier lever 22 in each direction, by an eccentric on the needle shaft 48 which engagesthe upper end of a link 50, the lower end of which is connected to the lever. The needle shaft 48 is connected with the sewing shaft 44 by gearing through which the needle shaft is given two revolutions for each revolution of the sewing shaft.

The mechanism for vibrating or jogging the needle 10 comprises a carrier sleeve 52 within which the needle bar 54: reciprocates. The lower end of the carrier sleeve is connected by a link'56 to arelatively fixed pivot 58 which is carried on a rotary head 60. The upper end of the sleeve is connected to the horizontal arm of a bell crank lever 62 by a ball joint. The vertical arm of the bell crank lever is connected to the forward end of a rod 64 by an adjustable. pivot block 66. The rear end of therod is provided with an eccentric strap engaging an eccentric on the sewing shaft. When the carrier sleeve is moved downward, the link 56 will act to swing the lower end of the carrier and the needle bar toward the. right, so that the needle will be in position to form the depth stitch. When the carrier sleeve is raised, the link will act to swing the sleeve toward the left, thus bringing the needle into position to form the slit or edge stitch. The needle bar is reciprocated by a crank 68 on the needle shaft 48, and since this shaft makes two revolutions for each revolution of the sewing shaft, the eccentric on thesewing shaft lll ' of which is provlded with an arm carrying a roll engaged by a cam on the cam shaft of the machine.

While the invention has been shown and described as embodied in a machine for sewing a two-thread overseam, in which-the upper thread is carried by a transversely vibrating needle, and in which the sewing mechanism is mounted for rotation during the sewing, it will be understood that the invention isnot confined in its application to such a machine, but may be embodied with advantage in other types of machines. It will also be understood that the broader features of the invention are not limited te the specific construction shown and descrlbed,

but may be embodied in other structures, the

specific construction and arrangement of the parts being varied or modified as found desirable or best suited to the machine 1n which the invention is to be embodied.

Having explained thenature and object ofthe invention and specifically described one form of mec anism in which it may be embodied, what is claimed is.:-

1. A sewing machine, having, in combination, an upper needle mechanism above the work, a thread carrying looper mounted to reciprocate and to move transversely of the needle below the work, an opposed and alternately acting looper, and a spreader point moving with and transversely of the second looper.

2. A sewing machine, having, in combination, an upper needle mechanism above the work, a reciprocating carrier below the work, a thread carrymg and an opposed non-thread carrying looper carried on the carrier, a loop spreader point cooperating with the non-thread carrying looper, and

. mechanism for moving the thread carrying looper and the spreader point transversely during each reciprocation of the carrier.

3. A sewing machine, having, in combination, a reciprocating and laterally jogging upper needle, two opposed looper points below the work, one of which carries a thread,

-mechanism for reciprocating the looper points and for moving the thread carrymg looper across ,the needle .path, and a loop spreader point moving with and transversely of the other looper point.

4. A sewingmachine, having, in combination, an upper needle mechanism above the work, a reciprocating support below the work, a carrier mounted to move with and transversely of the support, a single looper on the support, and a cooperating loop spreader and an opposed looper on the carrier.

5. A sewing machine, having, in combination, an upper needle mechanlsm above the work, two opposed looper points below the work, mechanism for reciprocating the looper points to alternately enterthe needle loops, a loop spreader point arranged to enter a needle loop with one of the looper points, and mechanism for moving the spreader point transversely to spread the needle loop entered by the corresponding looper point and for moving the other looper point transversely across the needle path when through a needle loop.

6. .A sewing machine, having, in combination, an upper needle mechanism above the work, a reciprocating carrier below the work, two opposed loopers on the carrier, a loop spreader cooperating with one of the loopers, mechanism for moving the other looper transversely of the needle to shift its loop bodily into position for the passage of the needle therethrough, and for moving the spreader transversely of the needle to spread the loop carried by the cooperating looper for the passage of the needle therethrough.

7. A sewing machine, having, in combination, an upper needle mechanism above the work, a carrier below the work mounted to oscillate with relation to the needle, a transversely movable carrier moving with the oscillating carrier, a single looper point on the oscillating carrier, and a cooperating spreader point and=an opposed looper point on the transversely movable carrier.

8. A sewing machine, having, in combination, an upper needle mechanism above the work, a support below the work mounted to oscillate with relation to the needle, a

. carrier mounted on the support to oscillate about an axis substantially at right angles to the axis of the support, a single looper point on the oscillating support, a cooperating loop spreader point and an opposed looper point on the,carrier, and mechanism for oscillating the support and for oscillating the carrier on the support.

9. A sewing machine, havin in combination, an upper needle mechamsm above the work, a reciprocating and transversely movingthread carrying looper provided with a lateral projection back of its'thread eye to deflect the loop entered by the looper, an opposed reciprocating looper, and means cooperating therewith to spread the loop entered thereby.

10. A sewing machine, having, in com- -bination, an upper needle mechanism above point moving with and transversely of the other looper point.

GEORGE s. HILL.