GB142561A - Thread cutting and nipping mechanisms for sewing machines - Google Patents

Thread cutting and nipping mechanisms for sewing machines

Info

Publication number
GB142561A
GB142561A GB301119A GB301119A GB142561A GB 142561 A GB142561 A GB 142561A GB 301119 A GB301119 A GB 301119A GB 301119 A GB301119 A GB 301119A GB 142561 A GB142561 A GB 142561A
Authority
GB
United Kingdom
Prior art keywords
thread
lever
stitching
cam
latch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB301119A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Singer Co
Original Assignee
Singer Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Singer Co filed Critical Singer Co
Priority to GB301119A priority Critical patent/GB142561A/en
Publication of GB142561A publication Critical patent/GB142561A/en
Expired legal-status Critical Current

Links

Classifications

    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B65/00Devices for severing the needle or lower thread

Abstract

142,561. Fairweather, W., (Singer Manufacturing Co.). Feb. 7, 1919. Button-hole sewing-machines; thread-cutters and end-holders.-In a buttonhole sewing-machine in which the needle thread s cut and held at the completion of a button-hole and is released after the commencement of the next stitching operation, the thread-nipper is operated to release the needle-thread end by connexion with the main shaft of the stitching- elements. The thread-cutter and end-holder comprises two arms 41, 42, Fig. 7, pivoted at 40 on an extension of the workclamping foot 22'. The lower arm 42, in conjunction with a fixed blade, cuts the thread, and the upper arm 41 nips the thread against the underside of an upper plate. The arms 41, 42 are operated together by means of a rod 49, Fig. @. The rod is urged rearwardly for the cutting and nipping operation by a spring 52 and is restrained by a latch 57, which is withdrawn by the feed-cam, acting through a lever 74 at the close of a cycle of operations and just prior to the opening of the work-clamp by means of the same lever 74 and a plate 63. During the first revolution of the main shaft 5, Fig. 1, of the stitching- devices, a switch cam 90 operates upon a lever 88, Fig. 1, and a lever 86, Fig. 4, is swung to the right and the rod 49 actuated to retract the thread-nipper and release the thread. After the lateral movement of the lever 88, the spring-pressed pin 89, engaging the groove in the cam, is, pressed outwards by a rise in the cam-surface and is latched in its extreme position out of contact with the cam by a latch 96. The lever 88 being freed, a spring 94 returns it to its original position and removes the lever 86; the rod 49, however, remains locked by the latch 57 until the completion of the button-hole stitching. After the completion of the stitching, the stitching-elements are, by the bar 14 and the usual toothed gears, turned back to initial position, and, in this movement, a tooth 103 on the bar 14 engages with a latch tooth 100, Fig. 4, past which it had previously snapped, and moves the latch 96 from engagement with the pin 89. The pin thereupon moves into the groove of the cam 90 and is available for the operation of the lever 88 on the first revolution. The needlethread passes a tensioning-device 125, a rotary take-up 127, and down the centre of the hollow needle-bar. A thread pull-off 130 is operated prior to the commencement of stitching, by means of a lever 135 and a pin 140 on the cutter-lever 8.
GB301119A 1919-02-07 1919-02-07 Thread cutting and nipping mechanisms for sewing machines Expired GB142561A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB301119A GB142561A (en) 1919-02-07 1919-02-07 Thread cutting and nipping mechanisms for sewing machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB301119A GB142561A (en) 1919-02-07 1919-02-07 Thread cutting and nipping mechanisms for sewing machines

Publications (1)

Publication Number Publication Date
GB142561A true GB142561A (en) 1920-05-07

Family

ID=9750257

Family Applications (1)

Application Number Title Priority Date Filing Date
GB301119A Expired GB142561A (en) 1919-02-07 1919-02-07 Thread cutting and nipping mechanisms for sewing machines

Country Status (1)

Country Link
GB (1) GB142561A (en)

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