GB826488A - Improvements in or relating to sewing machines - Google Patents
Improvements in or relating to sewing machinesInfo
- Publication number
- GB826488A GB826488A GB21642/56A GB2164256A GB826488A GB 826488 A GB826488 A GB 826488A GB 21642/56 A GB21642/56 A GB 21642/56A GB 2164256 A GB2164256 A GB 2164256A GB 826488 A GB826488 A GB 826488A
- Authority
- GB
- United Kingdom
- Prior art keywords
- machine
- relay
- contacts
- circuit
- speed
- 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
- D05B51/00—Applications of needle-thread guards; Thread-break detectors
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
826,488. Sewing machines. PFAFF A. G., G. M. July 13, 1956 [Aug. 2,1955], No. 21642/56. Class 112 Stopping. The circuit through a relay adapted to stop the machine is periodically interrupted in synchronism with the periodic thread tension, the relays having a delayed action such that the machine is only stopped when the thread fails or breaks. The invention is described in connection with a button-hole machine which is automatically stopped, irrespective of the relay control, after a predetermined cycle, the speed of the machine being first reduced to half-speed just prior to stopping. The interrupter comprises a contact 43, insulatingly secured to the machine head and periodically contacted by the end of the take-up spring 41. The machine is started by closing the switch 46 and the current pulses in the circuit do not actuate the relay 69 due to delay action produced by resistance 66 and capacity 71. If, however, contacts 41, 43 remain closed the relay closes contacts 75, 76 to energize electromagnet 51 to reduce the speed of the machine to half-speed, and closes contacts 73, 74 to short-circuit the relay winding 68 by resistance 78. The relay opens it contacts and then closes them again and electromagnet 51 is again energized to stop the machine. The electromagnet may actuate a circuit breaker in the circuit of the machine motor to effect immediate stoppage. The invention may be applied to a multi-needle machine the thread take-up contacts for each needle being arranged in parallel.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE826488X | 1955-08-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB826488A true GB826488A (en) | 1960-01-06 |
Family
ID=6747798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB21642/56A Expired GB826488A (en) | 1955-08-02 | 1956-07-13 | Improvements in or relating to sewing machines |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB826488A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1989012124A1 (en) * | 1988-06-01 | 1989-12-14 | G.M. Pfaff Aktiengesellschaft | Thread stop-motion device |
-
1956
- 1956-07-13 GB GB21642/56A patent/GB826488A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1989012124A1 (en) * | 1988-06-01 | 1989-12-14 | G.M. Pfaff Aktiengesellschaft | Thread stop-motion device |
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