US2981497A - Thread tensioner - Google Patents
Thread tensioner Download PDFInfo
- Publication number
- US2981497A US2981497A US683834A US68383457A US2981497A US 2981497 A US2981497 A US 2981497A US 683834 A US683834 A US 683834A US 68383457 A US68383457 A US 68383457A US 2981497 A US2981497 A US 2981497A
- Authority
- US
- United States
- Prior art keywords
- thread
- brake
- spring
- casing
- bow
- 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 - Lifetime
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
- D04B15/38—Devices for supplying, feeding, or guiding threads to needles
- D04B15/44—Tensioning devices for individual threads
-
- 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
- B65H59/24—Surfaces movable automatically to compensate for variation in tension
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B7/00—Flat-bed knitting machines with independently-movable needles
- D04B7/08—Flat-bed knitting machines with independently-movable needles for domestic use
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
Definitions
- a thread guide is often used which, as in hand knitting machines, performs the function of feeding to the needles the thread coming from the ball or spool.
- a thread returner in the form of a sprung wire arm having at its outer end an eye through which the thread passes.
- the necessity for providing a thread returner of this kind arises from the reciprocating lock movement in hand-operated flat knitting apparatus since in each of the two end positions the lock has to be moved out beyond the last needles. Since the thread guide is mounted approximately in the middle of the lock, a free thread length, corresponding to about half the length of the lock, arises between the last needles and the thread guide.
- the thread brake which usually consists of two sprung discs lying one upon the other, has to be continually regulated by means of an adjusting screw in order to obtain the cor rect thread tension.
- This regulation depends on the thickness and nature of the thread, and more particularly on the smoothness thereof.
- This adjustment in addition to being time-wasting and difficult also has the disadvantage that it -does not reliably ensure a uniform thread tension, and the detrimental effect of this appears more particularly when yarns are being used which are not uniform in nature throughout their whole length. Particularly serious trouble arises if there are knops or knots in the yarn.
- a thread tensioning device is used which continuously adjusts itself automatically in dependency on the yarn thickness and the nature of the yarn.
- the thread brake is operatively connected with a rockably mounted sprung bow which is used not only for returning the thread but also at the same time for regulating the braking force of the brake, the bow swinging further out when the thread tension increases and weakening the braking action through suitable transmission means.
- Figure l is a longitudinal section through a thread tensioner with spring bow
- Figure 2 shows the thread tensioner in side elevation
- Figure 3 is a front view of the thread tensioner, seen in the direction of the arrow A;
- Figure 4 is a cross section through the thread ten sioner, on line IV-IV of Figure 1.
- the thread tensioner comprises a box-shaped casing 1 of which the front wall 2 is made relatively thick and extends over ⁇ only part of the height of the box, as is shown in Figure 1.
- the top and bottom edges 3 of this wall are rounded and serve as support for a brake plate 4 which has curved lobes 5 and 6 engaging over these rounded parts and is thereby secured to the wall 2.
- the brake plate 4 is of upwardly tapering shape. This can be seen from the edges 7 which are inclined and converge upwards towards one another.
- guide wings 8 are provided on the two side edges 7, which wings extend vertically upwards; these wings are bent away at right angles out of the surface of the brake plate; their shape can be seen from Figure l. These guide wings areadapted to provide lateral guidance for the thread passing through.
- the casing 1 has a rear wall 9 of which the bottom part is provided with a transverse slot 11 serving to accommodate the curved bottom end 12 of another brake plate 13.
- This second brake plate 13 is pressed against the iirst brake plate 12 by a twin helical spring 14.
- the two spring coils 15 are both mounted on one and the same pin 16 on the side walls 17 and 18 of the casing.
- the wire ends at the two adjacent end faces ofthe spring coils are combined to form a U-shaped bow 1'9.
- the U-shaped bow bears against the surface of the brake plate 13.
- the outer wire ends Ztl of the spring coils bear against the rear wall 9 of the casing.
- one of the side walls that is to say the side wall 18, is made relatively narrow over almost the whole of its length and is offset towards the yrear wall 9, as shown in Figure 2.
- the side wall 18 is ywidened to form a circular disc 21.
- a stud 22 extends from the top part of the other side wall 17 and bears against the circular part 21 of the side wall 18.
- the side wall 18 is connected to the stud 22 by means of a screw 23.
- a helical spring part 24 of a spring bow 2S is slid on to the stud 22 from the side.
- the helical spring part 24 has a downwardly extending end 26 with a hook 27 engaging in the end of the U-shaped bow'19 of the twin helical spring 14.
- At the end of the spring bow 25 is an eye 28 through which the thread 29 passes.
- a forwardly open slot 31 through which the thread 29 can pass, is provided in the bottom 30 of the thread tensioner casing.
- the other tensioning plate 13 is also made slightly curved, so as to form a channel, over the whole of its vertical portion, as is shown in Figure 4.
- the camber of this curved part amounts to about one to two tenths or a millimetre.
- the side edges 32 and the top edge 33 of the brake plate 13 are made curved, in order to enable the thread to be inserted easily and also to prevent sharp edges from arising, which might damage the thread or increase the braking action undesirably.
- a thread tensioner particularly for hand operated at knitting machines, comprising aY casing, a relatively fixed brake component in the casing, a movable brake component within the casing and cooperable with the fixed brake component to coact with the thread passing therebetween, spring means within the casing and in cluding a looped portion bearing against and normally urging the movable brake component against the fixed brake component, an elongated resilient bow-shaped element having a thread guide adjacent one end of said resilient element exteriorly of the casing, a shaft within the casing above the brake components, the resilient element having a helical coil portion mounted on and turnableabout said shaft, said resilient element having a portion extending downwardly from said helical coil portion, connecting means on said downwardly extending portion connecting said downwardly extending portion ofwthe resilient element with the looped portion of the spring means so that as thread tension increases, the thread guide is displaced in a direction' toward the brake components, thereby movingvsaid downwardly extending portion of the resilient element and looped portion of the spring means
- a thread tensioner as claimed in claim l in which said spring means includes a pair of spaced helical coils mounted on a second shaft xed in the casing with thc free ends of the coils bearing against the casing and said looped'portion being provided between the pair of helical coils, and said connecting means being defined by a hook engageable with the looped portion of the spring means.
- a thread tensioner' as claimed in claim l in which said movable brake component comprises an elongated sheet metal member having outwardly curved side edges and upper and lower curved ends with the curvature extending in a direction away from the xed brake component and the lower curved end being disposed in a transverse slotformed in the rear wall of the casing.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Tension Adjustment In Filamentary Materials (AREA)
- Curtains And Furnishings For Windows Or Doors (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEST11677A DE1181855B (de) | 1956-09-17 | 1956-09-17 | Fadenspanner |
Publications (1)
Publication Number | Publication Date |
---|---|
US2981497A true US2981497A (en) | 1961-04-25 |
Family
ID=7455478
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US683834A Expired - Lifetime US2981497A (en) | 1956-09-17 | 1957-09-13 | Thread tensioner |
Country Status (5)
Country | Link |
---|---|
US (1) | US2981497A (de) |
CH (1) | CH340305A (de) |
DE (1) | DE1181855B (de) |
FR (1) | FR1187046A (de) |
GB (1) | GB851912A (de) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3340903A (en) * | 1964-10-10 | 1967-09-12 | Golobart Ramon Balaguer | Tensioning and regulating device for the passage of weft threads of different thickness |
US3797279A (en) * | 1971-05-26 | 1974-03-19 | L Kline | Thread-feeding, tension-regulating device for straight knitting machines |
US3937417A (en) * | 1973-12-28 | 1976-02-10 | Chevron Research Company | Apparatus for tensioning yarn |
US4111141A (en) * | 1975-06-23 | 1978-09-05 | Western Stamping Corporation | Thread tensioner |
US5050816A (en) * | 1990-03-14 | 1991-09-24 | Belmont Textile Machinery Co., Inc. | Strand tension controller |
GB2378188A (en) * | 2001-07-28 | 2003-02-05 | Griffith Textile Mach Ltd | Adjustable yarn tensioning and clamping device |
US20040061020A1 (en) * | 2002-09-30 | 2004-04-01 | Solutia Inc. | device for direct insertion of yarn in automatic winder |
ES2784920A1 (es) * | 2020-02-10 | 2020-10-02 | Twistperfect S L | Maquina y proceso de desenrollado y enrollado de hilo a una velocidad superior a 1m/s |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1986003524A1 (en) * | 1984-12-06 | 1986-06-19 | Curry Roger F N | Flat bed knitting machines |
DE3446567C1 (de) * | 1984-12-20 | 1986-05-07 | Lindauer Dornier Gmbh, 8990 Lindau | Schussfadenbremse mit stufenweise steuerbarer Bremswirkung |
CS255135B1 (en) * | 1986-05-12 | 1988-02-15 | Milan Fucik | Device for the thread tensioning |
EP0381908A1 (de) * | 1989-02-07 | 1990-08-16 | José Abril Cullell | Vorrichtung zur Selbststeuerung und automatischen Regelung von Fadenspannung und -verbrauch an Flachstrickmaschinen |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1456074A (en) * | 1921-09-27 | 1923-05-22 | Albert M Pigeon | Yarn-tension device |
US2405885A (en) * | 1945-02-15 | 1946-08-13 | Saco Lowell Shops | Yarn tensioning device |
US2646943A (en) * | 1951-06-13 | 1953-07-28 | Hugh T Overton | Tension control device |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE257215C (de) * | ||||
US1066234A (en) * | 1911-07-10 | 1913-07-01 | Acme Knitting Machine And Needle Company | Thread cutter and clamp for knitting-machines. |
DE285522C (de) * | 1914-02-03 | |||
GB683928A (en) * | 1949-12-30 | 1952-12-10 | Specialties Dev Corp | Yarn tensioning device |
DE863981C (de) * | 1951-10-23 | 1953-01-22 | Gottlieb Eppinger Maschinenfab | Fadenspannungsregler fuer Wirk- oder Strickmaschinen |
-
1956
- 1956-09-17 DE DEST11677A patent/DE1181855B/de active Pending
-
1957
- 1957-09-09 GB GB28345/57A patent/GB851912A/en not_active Expired
- 1957-09-11 CH CH340305D patent/CH340305A/de unknown
- 1957-09-13 US US683834A patent/US2981497A/en not_active Expired - Lifetime
- 1957-09-16 FR FR1187046D patent/FR1187046A/fr not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1456074A (en) * | 1921-09-27 | 1923-05-22 | Albert M Pigeon | Yarn-tension device |
US2405885A (en) * | 1945-02-15 | 1946-08-13 | Saco Lowell Shops | Yarn tensioning device |
US2646943A (en) * | 1951-06-13 | 1953-07-28 | Hugh T Overton | Tension control device |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3340903A (en) * | 1964-10-10 | 1967-09-12 | Golobart Ramon Balaguer | Tensioning and regulating device for the passage of weft threads of different thickness |
US3797279A (en) * | 1971-05-26 | 1974-03-19 | L Kline | Thread-feeding, tension-regulating device for straight knitting machines |
US3937417A (en) * | 1973-12-28 | 1976-02-10 | Chevron Research Company | Apparatus for tensioning yarn |
US4111141A (en) * | 1975-06-23 | 1978-09-05 | Western Stamping Corporation | Thread tensioner |
US5050816A (en) * | 1990-03-14 | 1991-09-24 | Belmont Textile Machinery Co., Inc. | Strand tension controller |
GB2378188B (en) * | 2001-07-28 | 2005-03-30 | Griffith Textile Mach Ltd | A creel |
BE1015203A5 (fr) * | 2001-07-28 | 2004-11-09 | Griffith Textile Mach Ltd | Dispositif de tension de fil et cantre mettant en oeuvre le dispositif. |
GB2378188A (en) * | 2001-07-28 | 2003-02-05 | Griffith Textile Mach Ltd | Adjustable yarn tensioning and clamping device |
US20040061020A1 (en) * | 2002-09-30 | 2004-04-01 | Solutia Inc. | device for direct insertion of yarn in automatic winder |
US6755366B2 (en) * | 2002-09-30 | 2004-06-29 | Solutia Inc. | Device for direct insertion of yarn in automatic winder |
ES2784920A1 (es) * | 2020-02-10 | 2020-10-02 | Twistperfect S L | Maquina y proceso de desenrollado y enrollado de hilo a una velocidad superior a 1m/s |
WO2021160913A1 (es) * | 2020-02-10 | 2021-08-19 | Twistperfect, S.L. | Maquina y proceso de desenrollado y enrollado de hilo a una velocidad superior a 1m/s |
CN115052825A (zh) * | 2020-02-10 | 2022-09-13 | 特威斯特普非特公司 | 用于以大于1m/s的速度退绕和卷绕纱线的机器和方法 |
Also Published As
Publication number | Publication date |
---|---|
CH340305A (de) | 1959-08-15 |
FR1187046A (fr) | 1959-09-04 |
GB851912A (en) | 1960-10-19 |
DE1181855B (de) | 1964-11-19 |
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