GB755296A - Improvements in or relating to arrangements for stopping electrically operated sewing machines - Google Patents

Improvements in or relating to arrangements for stopping electrically operated sewing machines

Info

Publication number
GB755296A
GB755296A GB21691/54A GB2169154A GB755296A GB 755296 A GB755296 A GB 755296A GB 21691/54 A GB21691/54 A GB 21691/54A GB 2169154 A GB2169154 A GB 2169154A GB 755296 A GB755296 A GB 755296A
Authority
GB
United Kingdom
Prior art keywords
machine
disc
motor
brake
relay
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
GB21691/54A
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.)
GM Pfaff AG
Original Assignee
GM Pfaff AG
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 GM Pfaff AG filed Critical GM Pfaff AG
Publication of GB755296A publication Critical patent/GB755296A/en
Expired legal-status Critical Current

Links

Classifications

    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B69/00Driving-gear; Control devices
    • D05B69/22Devices for stopping drive when sewing tools have reached a predetermined position

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Stopping Of Electric Motors (AREA)

Abstract

755,296. Sewing-machines. PFAFF AKT.-GES., G. M. July 26, 1954 [Aug. 3, 1953], No. 21691/54. Class 112. [Also in Group XXXVII] Starting and stopping.-An electric motor 1 drives a sewing- machine when an electromagnetically-operated disc 4 on the motor shaft engages a disc 10 which is coupled with the driving pulley of the machine. For stopping the machine, the disc 10 is attracted by a braking disc 7 when the coil of the latter is energized. The control circuit of the machine is supplied, through rectifier 3, from the stator winding of the motor which acts as an auto-transformer, and, when a regulator 11 for the disc 4 is moved to its " off " position, switch 15 closes to energize the braking disc coil. A time-delay relay 18 is also energized, and, after a period, the coil of an auxiliary impulse relay 22 is supplied with current, so that a self-maintaining control relay 27 is actuated to interrupt the circuit to the brake disc coil 7 and complete the circuit for the disc 4. The machine is thus re-started and continues to run until the needle has reached its upper or lower dead-centre position whereupon contacts 47 or 48 of a limit switch 42 open to break the holding-circuit of the relay 27, so uncoupling the motor and reapplying the brake. The relay 22 prevents re-energization of the relay 27 after it has been de-energized in the required stopping-position of the machine. The upper or lower stopping- position of the needle is selected by means of a change-over switch 49. In a modification, the motor drives the machine directly, without the aid of a clutch, and the machine is stopped by means of an electromagnetically-operated brake on the motor shaft, Fig. 3 (not shown). The motor is connected in series with a carbon pile or other rheostat, which, when moved, to the " off " position, causes the brake to be applied and then lifted after a period of delay, a portion of the series resistance being shunted when the brake is released. The motor continues to run until the desired upper or lower stopping- position of the needle is reached, whereupon the brake is re-applied.
GB21691/54A 1953-08-03 1954-07-26 Improvements in or relating to arrangements for stopping electrically operated sewing machines Expired GB755296A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE755296X 1953-08-03
DE2876407X 1953-08-03

Publications (1)

Publication Number Publication Date
GB755296A true GB755296A (en) 1956-08-22

Family

ID=33098912

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21691/54A Expired GB755296A (en) 1953-08-03 1954-07-26 Improvements in or relating to arrangements for stopping electrically operated sewing machines

Country Status (2)

Country Link
US (1) US2876407A (en)
GB (1) GB755296A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2958302A (en) * 1955-08-05 1960-11-01 American Safety Table Co Automatic needle positioning mechanism
US3026834A (en) * 1959-06-29 1962-03-27 Hansen Glove Corp Automatic tool control mechanisms
GB947200A (en) * 1961-10-19 1964-01-22 Light S London Ltd Improvements in electrically driven sewing machines
FR1357700A (en) * 1963-02-25 1964-04-10 L Devanlay & Recoing Ets Centralized automatic control device for garment machines
US3367296A (en) * 1964-10-12 1968-02-06 United Shoe Machinery Corp Driving and stopping mechanisms

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2440849A (en) * 1945-03-26 1948-05-04 Cutler Hammer Inc Controller affording automatic stopping of motor-driven machinery
US2537269A (en) * 1948-03-18 1951-01-09 Ex Cell O Corp Spindle positioning device
US2692667A (en) * 1950-08-16 1954-10-26 Hansen Glove Corp Sewing machine needle control mechanism
US2753502A (en) * 1952-12-02 1956-07-03 Bardons And Oliver Inc Electric motor control for spindle positioner
US2698413A (en) * 1954-02-17 1954-12-28 Jones & Lamson Mach Co Motor control system for positioning devices

Also Published As

Publication number Publication date
US2876407A (en) 1959-03-03

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