US707227A

US707227A - Chain-stitch sewing-machine.

Info

Publication number: US707227A
Application number: US8460601A
Authority: US
Inventors: Henry J Hancock
Original assignee: WILLIAM S JESSUP
Current assignee: WILLIAM S JESSUP
Priority date: 1901-12-04
Filing date: 1901-12-04
Publication date: 1902-08-19
Anticipated expiration: 1919-08-19

Description

No. 707,22 7. Patented Aug. l9, I902.

u. .lfnAucnck, CHAIN STITCH SEWING MACHINE.

V (pplicatiqn filed Dan}, 1901.) woman.) 2 Sheets-Sheet THE Nonms virus so. maToumou WASNINGYOPL n. C

No. 707,227. Patented/Aug. I9, |9D'2.'

( H. J. HANCOCK; CHAIN STITCH SEWING MACHINE.

(Application filed Dec. 4, 1901.)

(No Model.) 2 Sheeis--Sheet 2.

WITNESSES: INVENTOR i so UNITED STATES PATENT OFFICE.

HENRY J. HANCOCK, OF NEW YORK, N. Y., ASSIGNOR OF ONE-I-IALF'TO WILLIAM S. JESSUP, OF NEW YORK, N. Y.

CHAIN-STITCH SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 707,227, dated August 19, 1902. Application filed December 4.1901. Serial Ne. 84,606. (Ne-meson To all whom it may concern.-

Be it known that I, HENRY J. HANCOCK, a

citizen of the United States, residing at New Figure 1 is a side elevation of my improved Fig. 2 is a front view there-' sewing-machine.

of, the table being in section. Fig. 3 is a View of the two needle-bars in a difierent po sition from that shown in Fig. 2. Fig. 4 is a viewof the cam-lever in position and a portion of one of the needle-bars. Fig. 5 is an enlarged View of the presser-foot and head carrying the same. Fig. 6 is a view of the central portion of the presser-foot," and Fig. 7 is a plan view of the spool-holder.

In the accompanying drawings like numerals of reference refer to the same parts in each ofv the views, and in the practice of my invention I provide a frame 8, carrying shaft 9, on one end of which I mount a wheel 10, having a handle 11. On the opposite end of the shaft 9 I form a crank-arm 12, on which I mount a cross-bar 13 and one needle-bar 14. On the free end of the bar 13 I mount a second needle-bar 15, which is provided at the lower end with an eye 16, through which the thread 17'passes, and the needle-bar carries an eye-pointed needle 18, while the needle-bar 14 carries a blank needle 19. I also prefer to mount a tension 20 for the thread on the needle-bar 15. r

On the frame 8 above the shaft 9 I pivotally mount a cam-lever 21, having a cam-slot 22 formed therein, and on the crank 12 I form a shoulder 23, adapted-'"to engage the

sides

24 and 25 of said cam-slot 22 and swing the lower end 26 of said cam-lever back and forth, as will be readily understood. In the end 26 of said cam-lever I mount a pin or stud 27, and in the needle-bar 14 I form a lonforth by the movement of the cam-lever 21.

The frame 8 is provided with a cross-head 29, in which a presser-foot 30, formed out of a wire rod, is mounted and held in an adjustable manner by set-screws 31. Both ends I of the rod forming the'presser-foot are mounted in the said head, sothat' the central portion of the rod forms the part of the presserfoot which comes in contact with the cloth. This part is bent outward, as clearly shown in Fig. 1, and in the central part thereof is formed a slot of peculiar shape, as clearly shownin Fig. 6, one end being substantially V-shaped in form,-as shown at 31, the other end having a backwardly-inclined wall 32, and the end is V-shapedin form, as shown at 33, but back or at one side of the end 31,

;so that when the

needles

18 and 19 are at the opposite ends of the slot 34 the needle 19 will be back of the needle 18 and will "descend at the needles play, and on-the outer end 38 is mounted the'cloth plateor table 39, and the lever 36 is controlled by a'carn-lever 40, having serrations or teeth'41 on" its upper edge, which engage the lower surface of the lever 36 and hold the same at any point in a secure manner, so that the cloth-plate can be raised or lowered, as indicated by dotted lines in Fig. 1, and after the clothis inserted beneath the presser-foot 30 the cloth-plate is brought up to the presser-foot instead of the presserfoot being lowered on the cloth. I also provide a spool-holder 42, which may be provided with a nut 43 and washers 44, so that tension may be placed on the spool 45, as'wil lb e understood, and I also prefer to have a threadguide 46. f

The operation is asfollows: The cloth is inserted between the resser-foot and the clothplate. The plate is then raised until the cloth will be held rather firm, but not tight enough to prevent the ready feeding of the cloth. The shaft 9 is rotated by the handle 11, and the crank 12 carries around with it the cross-bar 13, which is fixed thereon in a predetermined position, and also carries with it the needlebar 14, which is pivotally mounted on said crank. The other needle bar is pivotally mounted on the free end of the cross-bar 13. As the crank 12 is rotated the shoulder 23 engages alternately the

walls

24 and 25 and carries the needle 19 back and forth in the slot 34 of the presser-foot at the same time the needle-bar is ascending and descending. The parts are so timed that the needle 19 will be in the end 33 of the slot when the needle is descending, at which time it will be at one side of the needle 18, which carries the thread, and as the needle 19 descends the needle 18 is timed so that it will commence its ascent and throw out a loop 47, through which the needle 19 passes in its descent. When the needle 19 is at the lowest point, it will be car ried toward the other needle by reason of the shoulder 23 engaging the side 25 of the cam until both needles are at the end 31 of the slot, as clearly shown in Fig. 3, at which time the needles are substantially in the same line, and the needle 18 is held in. the end 31 during its descent, so that it must pass directly through the loop of the thread held on the needle 19, and the needle 19 is so timed that it will leave the loop shortly after the needle 18 enters it and is ready to descend again and catch the next loop as it is thrown out. At the time the needle 19 is brought forward to hold the needle 18 in the end of the slot 34 it will feed the cloth along the length of the stitch, as will be readily understood. The inclined end 32 of the slot 34 serves tojcarry the needle 19 back, so that it will pass on one side of the needle 18 in the descent and pass through the loop of the thread instead of striking against the needle 18; but when the needle 19 passes out from this end of the slot it immediately springs back into a line parallel with the needle 18, this being efiected by the looseness and spring of the parts; but the parts are held quite rigid by the V-shaped end 31 of the slot 34 and the cam-lever 21 when the needle 18 is descending, so that the needle 18 cannot fail to pass through the loop held on the needle 19, this part not being illustrated because it will be readily understood by any one skilled in the art.

It will be understood that many changes in the details of construction can be made without departing from the spirit of my invention, and I reserve the right to make all such changes.

Having thus described my invention, What I claim as new, and desire to secure by Letters Patent, is

1. A chain-stitch sewing-machine comprising a frame, a crank-shaft provided at one end with a crank, means to rotate said shaft, two needle-bars carrying needles mounted on said crank, a cam-lever positively operated by said crank and controlling one of said needle-bars, a cloth-plate, and a presser-foot provided with a slot adapted to carry one needle back, or at one side of the other in its descent, and to hold the needles parallel during the descent of the other needle, for the purpose set forth.

2. A chain-stitch sewing-machine comprising a frame, a crank-shaft provided at one end with a crank, means to rotate said shaft, two needle-bars carrying needles mounted on said crank, a cam-lever pivotally connected with the frame above said shaft and provided with a slot, said crank being provided with a projection in engagement with the walls of said slot in the cam-lever, said cam-lever being in engagement with one of said needlebars, a cloth-plate, and a presser provided with a slot adapted to carry one needle back, or at one side of the other in its descent, and to hold the needles parallel during the descent of the other needle, as and for the purpose set forth.

3. A chain-stitch sewing-machine comprising a frame, a crank-shaft provided with a crank and means to rotate said shaft, a crossbar fixed on said crank, a needle-bar pivotally mounted on said crank, a second needlebar pivotally mounted on the free end of said cross-bar and carrying an eye-pointed needle, a presser-foot provided with a slot adapted to carry the respective needle back of the eyepointed needle during its descent and to hold the needles parallel during the descent of the eye-pointed needle, a cam-lever mounted on the frame and provided with a cam-slot and a stud engaging a slot in one of said needlebars, and a shoulder on said crank adapted to engage said cam-lever to positively control said needle-bars, as and for the purpose set forth.

4. A chain-stitch sewing-machine comprising a frame, a crank-shaft provided with a crank having a shoulder, two needle -bars mounted on said crank, a cam-lever adapted to positively control said needle-bars, a presserfoot provided with a slot adapted to control the movement of the needles during a portion of their movement, a lever pivoted on the frame, a cloth-plate mounted thereon, and a cam-lever provided with serrations or teeth adapted to engage said last-named lever, as and for the purpose set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

HENRY J. HANCOCK.

Witnesses:

E. L. LIVINGSTONE, JrRAHAM MOA'DAM.

IIO