GB701229A - Thread tension devices for lock-stitch sewing machines - Google Patents
Thread tension devices for lock-stitch sewing machinesInfo
- Publication number
- GB701229A GB701229A GB14601/51A GB1460151A GB701229A GB 701229 A GB701229 A GB 701229A GB 14601/51 A GB14601/51 A GB 14601/51A GB 1460151 A GB1460151 A GB 1460151A GB 701229 A GB701229 A GB 701229A
- Authority
- GB
- United Kingdom
- Prior art keywords
- machine
- lock
- drag
- thread tension
- sewing 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
- D05B47/00—Needle-thread tensioning devices; Applications of tensometers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
- B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
- B65H59/20—Co-operating surfaces mounted for relative movement
- B65H59/22—Co-operating surfaces mounted for relative movement and arranged to apply pressure to material
- B65H59/225—Tension discs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2513/00—Dynamic entities; Timing aspects
- B65H2513/10—Speed
- B65H2513/11—Speed angular
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2555/00—Actuating means
- B65H2555/10—Actuating means linear
- B65H2555/13—Actuating means linear magnetic, e.g. induction motors
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
- D05D2207/00—Use of special elements
- D05D2207/05—Magnetic devices
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
701,229. Electric control systems. SINGER MANUFACTURING CO. Dec. 20, 1951 [June 20, 1951], No. 14601/51. Class 40 (1). [Also in Group VII] In a lock-stitch sewing-machine having a thread tension device comprising discs 48a, 50a urged together by a spring 67 the drag exerted by the device on the needle thread is controlled by electro-magnetic means to vary with the sewing speed of the machine. An armature is secured to the main shaft 24a of the machine and is disposed between pole pieces 61 the field windings 62 of which are connected to a coil 63 surrounding a soft iron core 64 carrying a pin 65 extending through the tension device. As shown the drag of the device increases as the sewing speed increases, but the invention includes machines in which the drag decreases as the sewing speed increases. In a modification, Fig. 6 (not shown), the coil is supplied from a D.C. generator associated with the main shaft.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB299668X | 1951-06-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB701229A true GB701229A (en) | 1953-12-23 |
Family
ID=10300103
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB14601/51A Expired GB701229A (en) | 1951-06-20 | 1951-06-20 | Thread tension devices for lock-stitch sewing machines |
Country Status (3)
Country | Link |
---|---|
CH (1) | CH299668A (en) |
DE (1) | DE917886C (en) |
GB (1) | GB701229A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4301757A (en) * | 1978-06-13 | 1981-11-24 | Janome Sewing Machine Co. Ltd. | Automatic thread tension control device of sewing machine |
CN101122071B (en) * | 2006-08-08 | 2011-12-07 | 兄弟工业株式会社 | Thread adjusting device for sewing machine |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3827382A (en) * | 1972-10-24 | 1974-08-06 | Usm Corp | Method and apparatus for forming normally appearing stitches |
DE4141945C1 (en) * | 1991-12-19 | 1992-12-03 | Duerkopp Adler Ag, 4800 Bielefeld, De | Sewing machine thread tensioner - has tensioning element in effective connection with electromagnet |
-
1951
- 1951-06-20 GB GB14601/51A patent/GB701229A/en not_active Expired
- 1951-12-30 DE DES26640A patent/DE917886C/en not_active Expired
-
1952
- 1952-01-09 CH CH299668D patent/CH299668A/en unknown
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4301757A (en) * | 1978-06-13 | 1981-11-24 | Janome Sewing Machine Co. Ltd. | Automatic thread tension control device of sewing machine |
CN101122071B (en) * | 2006-08-08 | 2011-12-07 | 兄弟工业株式会社 | Thread adjusting device for sewing machine |
Also Published As
Publication number | Publication date |
---|---|
CH299668A (en) | 1954-06-30 |
DE917886C (en) | 1954-09-13 |
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