GB1289990A - - Google Patents
Info
- Publication number
- GB1289990A GB1289990A GB1289990DA GB1289990A GB 1289990 A GB1289990 A GB 1289990A GB 1289990D A GB1289990D A GB 1289990DA GB 1289990 A GB1289990 A GB 1289990A
- Authority
- GB
- United Kingdom
- Prior art keywords
- switch
- relay
- circuit
- transistor
- sewing machine
- 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
1289990 Sewing machine FARAH MFG CO Inc 8 Dec 1969 [30 Jan 1969] 59871/69 Heading D1G In a sewing machine an upper thread break detector comprises a switch controlled by the unbroken thread to repetitively open and close the switch, ducting means responsive to the repetitive operation to energise a relay, and means, operable when the thread breaks, the switch remains closed and the relay is deenergised, to signal that a break has occurred and/or stop the sewing machine, the switch being connected with a voltage source in a high impedance circuit so that fouling of the switch contacts by contaminents, which raise the contact resistance, can be tolerated. The switch is formed by a fixed contact 9 and the check spring 8 which is pulled away from contact 9 at each stitching cycle by the action of the take up lever. Operation. Relay 16 is energised when the sewing machine motor clutch is engaged to start the machine, the relay energising the circuit of lamp 17. The upper thread engages a loop 10 on the check spring 8 to open the switch contacts during stitch forming, the transistor 13 then being ON to charge capacitor 18 and switch transistor 14 ON and energise relay 15 to open the circuit of lamp 17. During the on-off action of the switch during normal stitching capacitor 18 maintains transistor 14 in this ON condition. On breakage of the upper thread the switch remains closed, capacitor 18 discharges and transistor 14 is turned OFF to de-energise relay 15 and complete the warning lamp circuit. The specification describes the values of the components of the circuit and states that a switch contact resistance of several thousands ohms, due to contaminants such as lint, may be tolerated. U solenoid valve may replace the lamp and then controls a pneumatic cylinder operating a brake and clutch.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US79529169A | 1969-01-30 | 1969-01-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1289990A true GB1289990A (en) | 1972-09-20 |
Family
ID=25165192
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1289990D Expired GB1289990A (en) | 1969-01-30 | 1969-12-08 |
Country Status (9)
Country | Link |
---|---|
US (1) | US3587497A (en) |
JP (1) | JPS5231784B1 (en) |
AT (1) | AT302791B (en) |
BE (1) | BE741366A (en) |
CH (1) | CH494851A (en) |
CS (1) | CS151539B2 (en) |
DE (1) | DE1957749A1 (en) |
GB (1) | GB1289990A (en) |
SE (1) | SE357586B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2135703A (en) * | 1983-02-25 | 1984-09-05 | Celestion Wood Limited | Warning device |
CN105937101A (en) * | 2016-06-24 | 2016-09-14 | 杰克缝纫机股份有限公司 | Sewing machine and broken stitch detection mechanism thereof |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH521916A (en) * | 1970-03-24 | 1972-04-30 | Zellweger Uster Ag | Electric guardian and use of the same |
US4102283A (en) * | 1976-11-01 | 1978-07-25 | Cluett, Peabody & Co., Inc. | Skipped stitch detector for chain stitch sewing machines |
US4170951A (en) * | 1978-12-14 | 1979-10-16 | The Singer Company | Skipped stitch detection system |
CS253087B1 (en) * | 1985-04-03 | 1987-10-15 | Otakar Curda | Thread motion guard |
US4735161A (en) * | 1986-10-20 | 1988-04-05 | Sew Simple Systems, Inc. | Sewing machine thread breakage detector |
US5383417A (en) * | 1992-10-26 | 1995-01-24 | Norrid; Paul E. | Needle thread stitch formation monitor |
US7204137B1 (en) * | 2003-08-20 | 2007-04-17 | Essex, Inc. | Thread breakage detection systems and methods |
CN103184665B (en) * | 2013-03-29 | 2015-04-15 | 黄站 | Alarm device for embroidery machine |
CN105734863A (en) * | 2016-04-29 | 2016-07-06 | 句容市行香光明绣花厂 | Relatively stable improved embroidering machine prompting fixture |
CN105908401A (en) * | 2016-06-24 | 2016-08-31 | 杰克缝纫机股份有限公司 | Pressure sensing type line breakage detection mechanism and sewing machine |
JP1588924S (en) | 2017-03-22 | 2017-10-23 | ||
JP1592335S (en) * | 2017-03-22 | 2017-12-04 | ||
JP1588925S (en) | 2017-03-22 | 2017-10-23 |
-
1969
- 1969-01-30 US US795291*A patent/US3587497A/en not_active Expired - Lifetime
- 1969-09-17 CH CH1405669A patent/CH494851A/en not_active IP Right Cessation
- 1969-10-30 SE SE14906/69A patent/SE357586B/xx unknown
- 1969-11-06 BE BE741366D patent/BE741366A/xx unknown
- 1969-11-17 DE DE19691957749 patent/DE1957749A1/en active Pending
- 1969-11-19 JP JP44092839A patent/JPS5231784B1/ja active Pending
- 1969-12-08 GB GB1289990D patent/GB1289990A/en not_active Expired
-
1970
- 1970-01-20 AT AT50570A patent/AT302791B/en not_active IP Right Cessation
- 1970-01-21 CS CS457A patent/CS151539B2/cs unknown
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2135703A (en) * | 1983-02-25 | 1984-09-05 | Celestion Wood Limited | Warning device |
CN105937101A (en) * | 2016-06-24 | 2016-09-14 | 杰克缝纫机股份有限公司 | Sewing machine and broken stitch detection mechanism thereof |
Also Published As
Publication number | Publication date |
---|---|
SE357586B (en) | 1973-07-02 |
CH494851A (en) | 1970-08-15 |
CS151539B2 (en) | 1973-10-19 |
AT302791B (en) | 1972-10-25 |
DE1957749A1 (en) | 1971-06-16 |
BE741366A (en) | 1970-04-16 |
JPS5231784B1 (en) | 1977-08-17 |
US3587497A (en) | 1971-06-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |