US3897916A - Magnetic thread brake - Google Patents
Magnetic thread brake Download PDFInfo
- Publication number
- US3897916A US3897916A US318178A US31817872A US3897916A US 3897916 A US3897916 A US 3897916A US 318178 A US318178 A US 318178A US 31817872 A US31817872 A US 31817872A US 3897916 A US3897916 A US 3897916A
- Authority
- US
- United States
- Prior art keywords
- thread
- roller
- brake
- magnet
- wheel
- 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
-
- 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
- B65H59/16—Braked elements rotated by material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/06—Coil winding
- H01F41/094—Tensioning or braking devices
-
- 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
- ABSTRACT Magnetic thread brake for yarn or thread feeding mechanisms.
- a peripherally grooved wheel is mounted for relative axial motion with respect to a braking surface and magnetic means are provided for constantly urging said wheel and braking surface together, whereby free rotation of said wheel is inhibited.
- Thread or yarn is fed to and wrapped around said wheel so that longitudinal movement of said yarn or thread tending to rotate said wheel is likewise inhibited and yarn drawn off from said wheel is thereby held taut.
- a preliminary braking unit immediately ahead of said wheel which tends to restrict at least lightly the passage of thread or yarn to said wheel whereby to maintain at least a slight tension on said thread or yarn as it is fed to said wheel and which will hold same firmly against further feeding if tension on the intraveling thread or yarn disappears such as by a breakage therein.
- MAGNETIC THREAD BRAKE This invention relates to a magnetic thread brake comprising a thread guide roller which is journaled at one end of an axle and about which is wound a thread at least in part, and a stationary brake-magnet system, which brakes the rotation of the thread guide roller which is effected by the thread.
- the object of the invention is to provide a thread brake of the class above mentioned such that it permits perfect thread tension control even at low tension and operates reliably although being of simple construc tion.
- This object is accomplished in accordance with the invention by magnetizing at least in part the thread guide roller and providing a permanent magnet later ally disposed adjacent on its circumference and by journalling the thread guide roller on said axle so as to be axially slidable for urging its side surface against a stationary friction surface by means of the permanent magnet.
- the thread brake in accordance with the invention is of simple construction. It has only one part which continuously rotates during operation, namely the thread guide roller. It has also been found that the braking ac tion is substantially independent of the relation of the thread to the friction surface. It is not very susceptible to breakdowns for this reason and is not affected by fine ravelings, fibers or dust.
- the permanent magnet has a magnetic field of a constant strength and is independent of an energy source. For this reason, it is also free from those disadvantages and disturbances which are associated with electromagnets.
- the thread guide roll is fixed on the axle and can be easily interchanged with another.
- the invention provides that the permanent magnet is of cylindrical shape and is encompassed by a coil spring firmly surrounding it and that the permanent magnet together with the coil spring can be screwed into a threaded bore. In this manner, merely varying the distance between the permanent magnet and the friction surface or the thread guide roller makes it possible to vary the braking action. It is also possible to employ commercial round bar magnets and coil springs.
- the thread brake is advantageous designed such that the thread guide roller is coated on the side facing toward the magnet with a material which increases the coefficient of friction or is provided with an interchangeable coating.
- the thread brake and the preliminary brake are secured to a common support and if the support comprises a rectangular base plate and two brackets arranged thereupon, both brackets being located on the same side of said base plate and forming a right angle between themselves and with respect to the base plate and if the first bracket is provided as a mounting for the preliminary brake and the second bracket is provided as a mounting for the brake-magnet system, for the axle and for the friction surface.
- Both the preliminary brake as well as the thread guide brake are mounted on the support and thus are fixed in their positions relative to each other.
- the thread brake is preferably provided with a thread guide hook on the support in the angle between the base plate and the first bracket. This hook prevents the thread passing to the thread guide roller from coming into contact with the thread issuing from the roller.
- FIG. 1 is a side elevation of a thread brake in accordance with the invention
- FIG. 2 is the front elevation of the thread brake in accordance with the invention shown in FIG. 1,
- FIG. 3 is a side elevation of the thread brake shown in FIG. I, the preliminary brake in accordance with line Ill-III in FIG. 2 being shown in section and the thread guide roller being indicated by the dotted lines and
- FIG. 4 is a detailed sectional elevation of the thread brake in accordance with line IV-IV in FIG. I.
- the magnetic thread brake l in accordance with the invention which is illustrated in the drawing has a thread guide roller 3 about which is wound at least partially the thread 2. As can be seen from FIG. 4, this is rotatably and loosely journaled on an axle 4 and abuts with one side on a friction brake plate 5.
- a cylindrical or round bar, permanent magnet 6 is arranged perpendicular to this friction plate 5. It is firmly surrounded by a coil spring 7. Both the round bar magnet and the coil spring are together screwed into a threaded hole 8.
- the hole 8 is formed in a sleeve 9 which is fixed to the brake plate 5.
- the cylindrical bar magnet 6 is lacquered on its surface in order to provide a rough surface for preventing the coil spring 7 from slipping or sliding.
- the sleeve 9 containing the bore 8 (FIG. 4) has two cylinders 11 and 12 in its external shape which are separated by an annular circumferential recess I0.
- Cylinder 12 has a somewhat larger diameter and, further, it has a small cylindrical projection 13 into which the axle is inserted.
- the axle 4 is located in the center of the circular friction plate 5.
- a support 14 has a base plate 15 and two brackets 16 and 17 which are arranged on one side of the base plate and form a right angle both relative to one another as well as relative to the base plate.
- the one bracket 16 serves as a mounting support for a preliminary brake l8.
- Bracket 17, on the other hand, has a hole 19 perpendicular to its surface and a small semicircular recess 20 at the edge of this hole.
- the sleeve 9 together with the cylindrical member 11 and the cylindrical projection 13 match this hole and the recess whereby the sleeve can be slid into the hole up to the recess 10.
- the bracket 16 also possesses a hole 21 into which the preliminary brake 18 is inserted.
- the preliminary brake 18 has a chamber 22, an entrance opening 23 and an outlet opening 24.
- a sphere 25 which is movably disposed in the chamber 22 is urged onto a seat 26 surrounding the outlet opening 24 by the force of gravity.
- the housing of the preliminary brake 18 is provided with two parts, the line of separation 27 passing through the chamber. On the outside, it is designed as a cone opening at the bottom. However. as can be clearly seen from FIG. 3, the part 28 of the cylinder surrounding the outlet opening 24 is re ceived in the bore 21 of bracket 16.
- a thread guide hook 30 is positioned by its shank in an angle 29 between the base plate and the tab 16, with the head 30a of said shank lying against the angle 29, and its tip extends into a recess 31 of the angle 29.
- the preliminary brake 18, the support 14, the sleeve 9 and the friction surface 5 are all produced of plastic.
- the sphere is of iron or steel.
- the thread guide roller consists of two magnetizable soft iron discs 33 and 34 joined by a plastic rivet 32. The two discs 33 and 34 lie back-to-back and form a guide groove 35 between themselves.
- the plastic rivet 32 simultaneously serves as a bearing sleeve, by means of which the thread guide roller 3 is journaled on the axle 4.
- the thread guide book consists of a wear-resistant material, for example. sintered ceramic.
- the thread 2 is conducted through the preliminary brake 18, is wound around the thread guide roller 3 almost completely, and lies in the guide groove 35. It issues from the thread guide roller 3 and is conducted about the thread guide hook 30. The thread 2 is drawn downwardly from the thread guide hook 30 by some kind of force. Several processes occur simultaneously during this operation.
- the sphere executes irregular movements in the chamber, often coming into contact with the thread and attempting to re turn to the sphere seat under the influence of gravity.
- the thread is decelerated very slightly by this constant jamming or contacting action. It thus lies deep in the guide groove of the thread guide roller 3 and causes the thread guide roller to move in the direction of the thread due to the friction which is generated.
- the permanent magnet 6 draws the thread guide roller 3, which consists in part at least of soft iron, onto the friction plate 5. In so doing, the side of the thread guide roller 3 facing the magnet lies in direct contact with the friction plate 5, thereby producing frictional forces during rotation of the thread guide roller 3. This friction drags against the movement of the thread guide roller 3 and also that of the thread 2 as well.
- This brak' ing action can be easily adjusted by screwing the permanent magnet into or out of the bore 8.
- the support [4 can be mounted by means of screws and the holes 36 and 37 provided for this purpose.
- the thread is threaded in a simple manner.
- the upper housing part of the preliminary brake 18 is removed and the thread is introduced through the entrance opening 23 thence through the chamber, past the sphere 25 and out through the outlet opening 24.
- the thread is passed about the thread guide roller in clockwise direction and then through the thread guide book 30.
- the upper housing of the preliminary brake 18 is then replaced on the lower part.
- the invention is not restricted to the embodiment illustrated.
- a magnetic thread brake comprising a thread guide roller which is adapted for receiving thread wrapped therearound and which is at least in part of magnetizable material, means rotatably mounting said roller for rotation about its axis, a rotatably fixed braking plate positioned adjacent and axially movable relative to said roller, a permanent magnet of circular cross section positioned radially offset from said axis and with one pole thereof adjacent said roller, a coil spring firmly connected to and surrounding the magnet, an im ternally threaded sleeve fixed to said brake plate and coaxially receiving said magnet surrounded by the coil spring for adjustment axially of said roller and axially of said sleeve, whereby such adjustment will vary the force by which the roller and braking plate are urged together and thereby vary the drag imposed on the thread by said roller.
- a thread brake according to claim I wherein the thread guide roller has on the side thereof facing the magnet a material which increases the coefficient of friction.
- a thread brake according to claim 1 wherein the roller moves axially against the braking plate and the braking plate is fixed with respect to the magnet in at least any given adjustment thereof.
- a thread brake according to claim 1, wherein said brake plate comprises a circular plate positioned adjacent one axial end of and substantially coaxially aligned with said roller, said sleeve being fixed to said brake plate and projecting axially therefrom in a direction away from said roller whereby said brake plate is positioned between said roller and said sleeve, said sleeve having a threaded opening extending axially there through and open at both ends, said opening being radially offset from but substantially parallel to the rotational axis of said roller, the opening in said sleeve opening through said brake plate whereby the magnet positioned within said opening has one end thereof disposed directly opposite the adjacent axial face of said roller, and said magnet having the end thereof remote from said roller projecting outwardly beyond said sleeve so that said magnet can be rotated relative to said sleeve to axially adjust said magnet relative to said roller.
- brake device for preventing slipping of the thread as supplied to said roller, said brake device including wall means defining a chamber having inlet and outlet openings through which a thread can be passed and a sphere loosely disposed in the chamber and continuously urged into engagement with a seat surrounding one of said inlet and outlet openings, said outlet opening being substantially aligned with the groove formed in said roller.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Braking Arrangements (AREA)
- Tension Adjustment In Filamentary Materials (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19722200058 DE2200058A1 (de) | 1972-01-03 | 1972-01-03 | Magnetische fadenbremse |
Publications (1)
Publication Number | Publication Date |
---|---|
US3897916A true US3897916A (en) | 1975-08-05 |
Family
ID=5832223
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US318178A Expired - Lifetime US3897916A (en) | 1972-01-03 | 1972-12-26 | Magnetic thread brake |
Country Status (6)
Country | Link |
---|---|
US (1) | US3897916A (ja) |
JP (1) | JPS5118532B2 (ja) |
DE (1) | DE2200058A1 (ja) |
FR (1) | FR2167008A5 (ja) |
GB (1) | GB1368553A (ja) |
IT (1) | IT976023B (ja) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4352471A (en) * | 1981-05-13 | 1982-10-05 | Zust John E | Thread tensioning and brake device |
US4446691A (en) * | 1982-11-10 | 1984-05-08 | Milliken Research Corporation | High A.C.-D.C. yarn tension control |
US4446690A (en) * | 1982-10-18 | 1984-05-08 | Milliken Research Corporation | Bar balloon control |
US4449354A (en) * | 1982-10-18 | 1984-05-22 | Milliken Research Corporation | Disc type yarn tension control |
US4449356A (en) * | 1982-11-10 | 1984-05-22 | Milliken Research Corporation | Continuous A.C. tension control |
US4454710A (en) * | 1982-10-18 | 1984-06-19 | Milliken Research Corporation | Balloon control for yarn texturing machine |
US4457129A (en) * | 1982-10-18 | 1984-07-03 | Milliken Research Corporation | Slotted disc type yarn tension control |
US4462557A (en) * | 1982-10-18 | 1984-07-31 | Milliken Research Corporation | Spring biased electromagnetically controlled tension control |
US4470559A (en) * | 1983-04-04 | 1984-09-11 | Qualitex, Inc. | Ball tension with improved threading means |
US4478036A (en) * | 1983-02-22 | 1984-10-23 | Milliken Research Corporation | Method, apparatus and intermittently textured yarn |
US4532760A (en) * | 1984-02-21 | 1985-08-06 | Milliken Research Corporation | D. C. Yarn tension control |
US4967457A (en) * | 1988-12-02 | 1990-11-06 | Neumustersche Maschinen-und Apparatebau GmbH (Neumag) | Arrangement for stretching thermoplastic fibers |
US5318233A (en) * | 1993-02-02 | 1994-06-07 | Otto Zollinger | Ball tension device |
US6257516B1 (en) * | 1996-04-01 | 2001-07-10 | Iro Ab | Axial disc brake and yarn feeding device including an axial disc brake |
CN112320451A (zh) * | 2020-11-24 | 2021-02-05 | 江西美宝利实业有限公司 | 一种无梭织布机用导纱装置 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3605193C1 (de) * | 1986-02-19 | 1987-07-09 | Palitex Project Co Gmbh | Fadenbremse fuer Zwirnmaschinen,insbesondere Doppeldraht-Zwirnmaschinen |
DE4130301A1 (de) * | 1991-09-12 | 1993-03-18 | Schlafhorst & Co W | Rotierend angetriebene bremstelleranordnung eines fadenspanners |
DE29606722U1 (de) * | 1996-04-15 | 1996-07-18 | Klöcker-Entwicklungs-GmbH, 46325 Borken | Bremseinrichtung für den von einer Garnspule abgezogenen Faden |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2222921A (en) * | 1938-04-08 | 1940-11-26 | American Enka Corp | Thread brake |
US2677511A (en) * | 1950-02-03 | 1954-05-04 | North American Rayon Corp | Tension device for double twist spindles |
US2768796A (en) * | 1954-08-12 | 1956-10-30 | Levine Paul | Magnetic thread-tensioners |
US2924397A (en) * | 1957-03-18 | 1960-02-09 | Heppner Sales Co | Permanent magnet tension device |
US2978203A (en) * | 1958-09-25 | 1961-04-04 | American Thread Co | Tension roller device |
US3352511A (en) * | 1965-04-27 | 1967-11-14 | Entpr Machine & Dev Corp | Yarn tensioning device |
US3753535A (en) * | 1972-10-16 | 1973-08-21 | O Zollinger | Yarn tensioning device and method |
-
1972
- 1972-01-03 DE DE19722200058 patent/DE2200058A1/de active Pending
- 1972-12-11 FR FR7244009A patent/FR2167008A5/fr not_active Expired
- 1972-12-13 IT IT70898/72A patent/IT976023B/it active
- 1972-12-26 US US318178A patent/US3897916A/en not_active Expired - Lifetime
- 1972-12-28 JP JP48003985A patent/JPS5118532B2/ja not_active Expired
-
1973
- 1973-01-03 GB GB40673A patent/GB1368553A/en not_active Expired
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2222921A (en) * | 1938-04-08 | 1940-11-26 | American Enka Corp | Thread brake |
US2677511A (en) * | 1950-02-03 | 1954-05-04 | North American Rayon Corp | Tension device for double twist spindles |
US2768796A (en) * | 1954-08-12 | 1956-10-30 | Levine Paul | Magnetic thread-tensioners |
US2924397A (en) * | 1957-03-18 | 1960-02-09 | Heppner Sales Co | Permanent magnet tension device |
US2978203A (en) * | 1958-09-25 | 1961-04-04 | American Thread Co | Tension roller device |
US3352511A (en) * | 1965-04-27 | 1967-11-14 | Entpr Machine & Dev Corp | Yarn tensioning device |
US3753535A (en) * | 1972-10-16 | 1973-08-21 | O Zollinger | Yarn tensioning device and method |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4352471A (en) * | 1981-05-13 | 1982-10-05 | Zust John E | Thread tensioning and brake device |
US4457129A (en) * | 1982-10-18 | 1984-07-03 | Milliken Research Corporation | Slotted disc type yarn tension control |
US4449354A (en) * | 1982-10-18 | 1984-05-22 | Milliken Research Corporation | Disc type yarn tension control |
US4454710A (en) * | 1982-10-18 | 1984-06-19 | Milliken Research Corporation | Balloon control for yarn texturing machine |
US4462557A (en) * | 1982-10-18 | 1984-07-31 | Milliken Research Corporation | Spring biased electromagnetically controlled tension control |
US4446690A (en) * | 1982-10-18 | 1984-05-08 | Milliken Research Corporation | Bar balloon control |
US4449356A (en) * | 1982-11-10 | 1984-05-22 | Milliken Research Corporation | Continuous A.C. tension control |
US4446691A (en) * | 1982-11-10 | 1984-05-08 | Milliken Research Corporation | High A.C.-D.C. yarn tension control |
US4478036A (en) * | 1983-02-22 | 1984-10-23 | Milliken Research Corporation | Method, apparatus and intermittently textured yarn |
US4470559A (en) * | 1983-04-04 | 1984-09-11 | Qualitex, Inc. | Ball tension with improved threading means |
US4532760A (en) * | 1984-02-21 | 1985-08-06 | Milliken Research Corporation | D. C. Yarn tension control |
US4967457A (en) * | 1988-12-02 | 1990-11-06 | Neumustersche Maschinen-und Apparatebau GmbH (Neumag) | Arrangement for stretching thermoplastic fibers |
US5318233A (en) * | 1993-02-02 | 1994-06-07 | Otto Zollinger | Ball tension device |
US6257516B1 (en) * | 1996-04-01 | 2001-07-10 | Iro Ab | Axial disc brake and yarn feeding device including an axial disc brake |
CN112320451A (zh) * | 2020-11-24 | 2021-02-05 | 江西美宝利实业有限公司 | 一种无梭织布机用导纱装置 |
Also Published As
Publication number | Publication date |
---|---|
GB1368553A (en) | 1974-09-25 |
DE2200058A1 (de) | 1973-09-20 |
IT976023B (it) | 1974-08-20 |
JPS5118532B2 (ja) | 1976-06-10 |
FR2167008A5 (ja) | 1973-08-17 |
JPS4875834A (ja) | 1973-10-12 |
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