GB989691A - Improvements relating to foot or knee operable speed-control means for electrically-driven sewing machines - Google Patents

Improvements relating to foot or knee operable speed-control means for electrically-driven sewing machines

Info

Publication number
GB989691A
GB989691A GB171663A GB171663A GB989691A GB 989691 A GB989691 A GB 989691A GB 171663 A GB171663 A GB 171663A GB 171663 A GB171663 A GB 171663A GB 989691 A GB989691 A GB 989691A
Authority
GB
United Kingdom
Prior art keywords
arm
contacts
foot
sac
fixed
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
GB171663A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB171663A priority Critical patent/GB989691A/en
Publication of GB989691A publication Critical patent/GB989691A/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B69/00—Driving-gear; Control devices
    • D05B69/14—Devices for changing speed or for reversing direction of rotation
    • D05B69/18—Devices for changing speed or for reversing direction of rotation electric, e.g. foot pedals

Landscapes

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

Abstract

989, 691. Sewing machines. I. A. LESLIE. April 7, 1964 [Jan. 15, 1963], No. 1716/63. Heading D1G. [Also in Division H2] In an electrically-driven sewing machine, a device for controlling the speed of the driving motor is operated by fluid-pressure responsive means, pneumatically or hydraulically remotery controlled by foot-or-knee operable control means. An insulating bar 6, Fig. 2, carries spacedapart metal contacts 8 and is fixed to an insulating bar 5 carrying a resistance wire coil 4 in series with the driving motor, the contacts 8 engaging the coil 4 and constituting taps thereof. A resilient metal contact arm 7 is fixed at one end to bar 6 and is normally disengaged from the contacts 8. A fixed, inflatable air sac ,16 is disposed beneath a protuberance 15 at the free end of arm 7 and is connected by flexible tubing 17 to a foot-operable air bulb 18. Pressure on the latter serves to inflate sac 16 for raising arm 7 into progressive engagement with contacts 8. The speed of the motor is thereby determined by the degree of inflation of sac 16. A fan on the mirror shaft directs air on to coil 4. In a modification, Fig. 6, a wire coil 19 is engaged by contacts 20 on a bar 21. One end of a contact arm 22 is pivoted at 26 to one end of an oppositely-projecting resilient carrier arm 27 fixed at its other end to bar 21. A fixed air sac 23, disposed adjacent the free end of arm 21, is connected by flexible tubing 25 to a foot-operable air bulb 24. Arm 22 has a convex edge 28 which, when arm 22 is actuated by compression of bulb 24, engages the contacts only one at a time. A oneway air intake valve may be fitted to the footoperable bulb. A mechanical linkage may be interposed between the inflatable sac and the contact arm. The operating fluid may be water. The pressure responsive means may have metal diaphragms or metal bellows. The resistance coil may be replaced by a carbon-pile variable resistance.
GB171663A 1963-01-15 1963-01-15 Improvements relating to foot or knee operable speed-control means for electrically-driven sewing machines Expired GB989691A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB171663A GB989691A (en) 1963-01-15 1963-01-15 Improvements relating to foot or knee operable speed-control means for electrically-driven sewing machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB171663A GB989691A (en) 1963-01-15 1963-01-15 Improvements relating to foot or knee operable speed-control means for electrically-driven sewing machines

Publications (1)

Publication Number Publication Date
GB989691A true GB989691A (en) 1965-04-22

Family

ID=9726778

Family Applications (1)

Application Number Title Priority Date Filing Date
GB171663A Expired GB989691A (en) 1963-01-15 1963-01-15 Improvements relating to foot or knee operable speed-control means for electrically-driven sewing machines

Country Status (1)

Country Link
GB (1) GB989691A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2376240A1 (en) * 1976-12-29 1978-07-28 Mefina Sa ELECTRIC SEWING MACHINE MOTOR CONTROL DEVICE
US4413214A (en) * 1981-11-12 1983-11-01 The Singer Company Vented pneumatic foot controller
GB2303644A (en) * 1995-07-27 1997-02-26 Philip Shad Device for controlling sewing-machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2376240A1 (en) * 1976-12-29 1978-07-28 Mefina Sa ELECTRIC SEWING MACHINE MOTOR CONTROL DEVICE
US4261273A (en) * 1976-12-29 1981-04-14 Mefina S.A. Pneumatic speed control for an electric sewing machine
US4413214A (en) * 1981-11-12 1983-11-01 The Singer Company Vented pneumatic foot controller
GB2303644A (en) * 1995-07-27 1997-02-26 Philip Shad Device for controlling sewing-machine

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