GB617036A - Thread-controller for sewing machines - Google Patents

Thread-controller for sewing machines

Info

Publication number
GB617036A
GB617036A GB28767/46A GB2876746A GB617036A GB 617036 A GB617036 A GB 617036A GB 28767/46 A GB28767/46 A GB 28767/46A GB 2876746 A GB2876746 A GB 2876746A GB 617036 A GB617036 A GB 617036A
Authority
GB
United Kingdom
Prior art keywords
thread
needle
looper
loop
arm
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
GB28767/46A
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
Publication of GB617036A publication Critical patent/GB617036A/en
Expired legal-status Critical Current

Links

Classifications

    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B3/00Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing
    • D05B3/06Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing for sewing buttonholes
    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B63/00Devices associated with the loop-taker thread, e.g. for tensioning
    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B71/00Lubricating or cooling devices
    • D05B71/04Needle cooling devices
    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B73/00Casings
    • D05B73/04Lower casings
    • D05B73/12Slides; Needle plates

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Abstract

617,036. Sewing-machines. SINGER MANUFACTURING CO. Sept. 26, 1946, No. 28767, Convention date, May 18. [Class 112] Stitch-forming devices.-The invention relates primarily to improved means for controlling the looper thread in. a two-thread buttonhole sewing machine, to enable more accurate placing of the purl and the use of less thread tension than usual, thus giving a better finish and allowing of the use of lower quality needle thread and heavier looper thread. Improved means for' controlling the needle thread are also des- .cribed. In the arrangement described, in a buttonhole sewing-machine with a vibrating needle, the lower thread-handling devices comprise a thread-carrying looper 68, Fig. 10, and an opposed threadless looper 69 (not shown), moving in the plane of the needle vibration, two forked loop-detainers 90, 95 moving perpendicularly to that plane, and a thread-controller 149, all these members, together with the needle-throat member 112, being carried by a turret 61 which is rotatable by a sector gear 116, Fig. 1, in unison with a sector 117 which rotates the needle-bar ; no check-springs are used in controlling the thread. The complete stitch-forming cycle comprises : penetration by the needle 50, passing through the buttonhole slit, of the previous needle loop held by the detainer 90 ; release of the latter loop by the detainer and penetration of the new needle-loop by the threaded looper 68 ; withdrawal of the needle and engagement of the looper-thread by the detainer 95 ; release of the needle-loop by the looper 68 and penetration by the needle, passing through the material, of the looper-thread loop ; release of the latter loop by the detainer and engagement of the new needle-loop by the threadless looper ; and transfer of the latter loop to the loop detainer 90. The operations and thread-control are described in detail. Actuating loopers and loop-detainers.-The two loopers are carried by a single member 67 mounted on a pivot-pin 66, on a post on the turret 61, and connected by a link to a lug at the top of a tubular member 77, Fig. 1, sliding in the hub of the turret. The lower end of this member is connected to a pitman 81 which is reciprocated, to actuate the loopers, by a crank on a shaft driven intermittently through gearing by a wheel 89 on the main shaft 37 of the machine, the mechanism being such that each looper advances from and returns to a midposition, dwells there, retires further and returns while the other looper advances and returns, and then dwells again. The loop-detainers 90, 95 are carried on members 91, 96 respectively pivoted at 92, on posts 93 on the turret, and connected by links 98, 99 to a crosshead 100 on the upper end of a tubular member 101 sliding within the looper-operating member. The member 101 is engaged at its lower end by an arm 106, Fig. 1, on a verticallysliding member 107 provided with a stud which engages a cam-slot in the rear face of the wheel 89. Controlling looper thread.-The looper thread is led from a supply through a tubular guide 134, Fig. 1, an eye 135 in a pull-off arm 136, a fixed eye behind the pull-off arm, and another eye above a tension device 146, round the tension device and up the bore of the tubular member 101 ; the pull-off arm 136, pivoted at 137, has two arms engaged by pins on a wheel 142 on a shaft geared to the feed-wheel shaft. The thread passes from the top of the tube 101, of which the reciprocation produces some thread - control effects, to the looper 68 by way of an eye 152 in a thread-control member 149 fixed on an extension 147 of the pin which connects the link 99 to the crosshead 100, this pin being rigid with the crosshead. Controlling needle thread.-The needle thread is led, from a supply, round a tension device 126, Fig. 1, through a pair of eyes in a plate 129, through an eye in a take-up arm 122 and a thread-nipper 132 and then down the bore of the hollow needle-bar 46 ; the take-up arm is pivoted at one end and actuated by a stud engaging a cam-groove in a disc 119 on a vertical shaft geared to the needle-bar shaft to run at half the speed of the latter, the cam-groove being formed so as to fulfil, in conjunction with the action of the needle-bar, all the necessary thread control requirements, which are indicated in detail. Needles, vibrating laterally.-The needle 50 is carried by a block 49 slidable on a cross-pin in a yoke on the lower end of the needle-bar, the yoke being guided by members 51 depending from the needle-bar turret which is rotatable by a sector gear 117. A ring 54 is reciprocated vertically by a rod 55 actuated from a vertical shaft 40 by a pitman 59 and adjustable crank 57, the movement of the ring being translated by suitable mechanism into reciprocation of the block 49 along the cross-pin carrying-it.
GB28767/46A 1946-05-18 1946-09-26 Thread-controller for sewing machines Expired GB617036A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US670762A US2446261A (en) 1946-05-18 1946-05-18 Sewing machine

Publications (1)

Publication Number Publication Date
GB617036A true GB617036A (en) 1949-01-31

Family

ID=24691760

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28767/46A Expired GB617036A (en) 1946-05-18 1946-09-26 Thread-controller for sewing machines

Country Status (3)

Country Link
US (1) US2446261A (en)
DE (1) DE824585C (en)
GB (1) GB617036A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2995279A (en) * 1960-01-06 1961-08-08 American Safety Table Co Collar trimming and shaping apparatus
USRE30907E (en) * 1975-08-02 1982-04-20 Union Special G.M.B.H. Cooling device for sewing machines
US5454338A (en) * 1994-07-14 1995-10-03 Sara Lee Corporation Positive pressure lint barrier and oil cooler for a sewing machine
US10801144B2 (en) * 2018-02-07 2020-10-13 Hsien-Chang Tseng Hollow pipe joint structure for a sewing machine

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US15324A (en) * 1856-07-15 Means foe controi
US286164A (en) * 1883-10-02 Trimming mechanism for sewing-machines
US1162207A (en) * 1914-10-05 1915-11-30 Singer Mfg Co Stitch-forming mechanism for sewing-machines.
US1370006A (en) * 1916-12-15 1921-03-01 Westinghouse Electric & Mfg Co Adjustable mounting for electric motors
US1372473A (en) * 1918-03-13 1921-03-22 Singer Mfg Co Stitch-forming mechanism
US1719255A (en) * 1928-06-02 1929-07-02 Murray Co Air guard for suction fans
US1832899A (en) * 1929-01-12 1931-11-24 Frederics Inc E Hair drier
US2013816A (en) * 1933-08-28 1935-09-10 John W West Equipment for fuel oil burners
US2082738A (en) * 1935-06-29 1937-06-01 Union Special Machine Co Sewing machine
US2165016A (en) * 1938-04-26 1939-07-04 Singer Mfg Co Tension-releaser for sewing machines
US2210638A (en) * 1938-09-08 1940-08-06 Singer Mfg Co Thread and cord trimmer for buttonhole sewing machines
US2400741A (en) * 1943-04-12 1946-05-21 Union Special Machine Co Sewing machine

Also Published As

Publication number Publication date
DE824585C (en) 1952-01-07
US2446261A (en) 1948-08-03

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