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 machinesInfo
- 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
Links
Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/22—Devices 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.
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)
| 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)
| 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 |
-
1954
- 1954-07-26 GB GB21691/54A patent/GB755296A/en not_active Expired
- 1954-07-29 US US446517A patent/US2876407A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2876407A (en) | 1959-03-03 |
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