US2754071A - Thread tensioning device - Google Patents

Thread tensioning device Download PDF

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Publication number
US2754071A
US2754071A US160604A US16060450A US2754071A US 2754071 A US2754071 A US 2754071A US 160604 A US160604 A US 160604A US 16060450 A US16060450 A US 16060450A US 2754071 A US2754071 A US 2754071A
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United States
Prior art keywords
thread
tensioning
tension
members
movable
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
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US160604A
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English (en)
Inventor
Furst Stefan
Beckers Hans
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Individual
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Individual
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Publication of US2754071A publication Critical patent/US2754071A/en
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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
    • B65H59/20—Co-operating surfaces mounted for relative movement
    • B65H59/26—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path
    • B65H59/28—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path the surfaces being urged towards each other
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2601/00—Problem to be solved or advantage achieved
    • B65H2601/50—Diminishing, minimizing or reducing
    • B65H2601/52—Diminishing, minimizing or reducing entities relating to handling machine
    • B65H2601/524—Vibration
    • 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

  • the present invention relates to thread tensioning devices provided with a plurality of wrapping elements of the so-called claw-brake type, through which the thread must pass, and which by each wrapping action increase the tension in the thread.
  • the tension of a thread pulled over a body at rest increases in value at the same rate as the angle of wrap formed by the thread as the body increases in size and in proportion to the amount of friction existing between the thread and its support.
  • the irregularities of variations in the tension of the thread are not changed by the tensioning in any way, and that is why in tensioning devices of the known kind the variations in tension at the outlet side of the tensioning device are the same as at the thread inlet side. If, for instance, the tension of the thread at the inlet side of the device is between 0.5 to 5 gram and is to be increased tenfold in the device, then the tension,
  • the variations in tension are further increased by the fact that the movable part of the claw brake begins to perform oscillatory movements, whereby the differences in tension are augmented instead of being smoothed down. It has been tried to provide the adjustable moveable part of the tensioning device with damping means in order to prevent periodically occurring tension shocks from causing the aforesaid oscillatory movements. But this has merely reduced the additional movements of the movable part of the tensioning device and at the outlet as at the inlet side.
  • the present invention is in the first place based on the conception that an improvement of the claw brakes will be attained if the weight of their movable parts is reduced to such an extent that they respond to every reduced to the same degree as the inlet tension has increased.
  • either one of a plurality of electro-magnets may be employed in such a way that the force of the magnetic flux can be simultaneously and uniformly adjusted for a plurality of tensioning devices.
  • the pressure or tensioning members may be rotatably arranged in the device for the performance, either singly or in groups independently of each other, of swinging movements in the direction toward the thread.
  • the movable parts of the thread-brakes are subjected to an external force through magnets, which counteracts the of the thread increases, the the thread decreases accordingly and vice versa.
  • ing in value or size are the inlet tension and the wrap and vice versa.
  • Fig. 1 is a diagrammatic illustration of the thread tensioning means, showing how a thread passing through them is forming small angles of wrap at the tensioning members;
  • Fig. 2 is a diagrammatic illustration of the same thread tensioning means, showing how a thread passing through them is forming large angles of wrap at the tensioning members;
  • Fig. 3 is a coordinate diagram of transverse pressure versus angle of wrap
  • Fig. 4 is a longitudinal section of a tensioning device with tensioning members capable of swinging movements independently of one another;
  • Fig. 5 is a cross-section on line V-V of Fig. 4;
  • Fig. 6 is a diagrammatic illustration of a plurality of the tensioning devices of Figs. 4 and provided with simultaneously adjustable current supply means.
  • the reference character F denotes a thread passing between stationary tensioning members 1 and movable tensioning members 2 of a tensioning device. As illustrated in Figs. 1 and 2, the thread F is pulled through the tensioning members 1 and 2 in the direction of the arrow 3. There is a certain entering or inlet tension in the thread at'the side Where the portion 4 of the thread enters the tensioning device, and there also is a certaih outgoing or outlet tension in the thread at the side where it leaves the device in the direction of the'arro'w 3. The angles of wrap formed by the thread at the tensioning members 1 and 2 are indicated at 5. The tensioning pressure exerted upon the ovable tensioning members is etfective in the direction of the arrow 6.
  • a plurality of pin-shaped pressure or tensioning members 18 are arranged in the casing 1 7 of a tensioning device.
  • the pressure members 18 are resting against stationary supports provided by the coils of a wire helix 19 secured in casing 17 with the aid of a clamping pin 20.
  • a magnet 21 Positioned beneath the casing of the tensioning device is a magnet 21composed of elongated magnet bars 22 below the casing of the tensioning device.
  • the magnetic flux between the magnet bars 22 and the pressure members 18 is schematically indicated by lines 23.
  • the magnet 21 carries a magnet coil 24.
  • a group of tensioning devices 25 of the type illustrated in Figs. 4 and 5 is provided with a common current supply line 26 for all magnet coils 24.
  • the current supply line 26 is energized by a source of current 27 whose current supply or voltage is adjusted by means of a regulator 28.
  • the angle of wrap 5 at the tensioning members must vary with every variation in inlet tehsion,"a's" according to the lawsof rope friction the tension of the'thread increases or decreases "when the angle of wrap 5 increases or decreases.
  • the movable tensioning members 2 have to be placed under variable pressures 6 of very definite magnitude iii conformity with the characteristic indicated in Fig. 3.
  • the just-mentioned performance is obtained as follows: the movable pins 18 of comparatively light weight are biased by the attractive force of magnet 2i so as to exert pressure on the thread F passing under neath the pins 18 but above the turns of the stationary member 19.
  • the movable pins change their position with respect to the stationary member in conformity with the change of inlet tension occurring in the thread portion 4.
  • the pressure exerted upon the movable pins increases at the same rate as the distance through which the pins are moving. This rate is in conformity with the rate of increase of the angle of wrap.
  • the weight of the pins is so slight that, when the irregularities or variations in thread tension stay within normal limits, the change in position of the movable pins is so rapid as to instantly follow every change in inlet tension, thus securing the desired constancy of outlet tension.
  • the density of the magnetic flux in a plurality of tensioning devices 25 may be regulated simultaneously by controlling the current in the current supply line 26 by means of the regulator 28, as illustrated in Fig. 6.
  • Such a control circuit makes it possible to adjust the outlet tension simultaneously and uniformly for a group of thread tensioning devices.
  • a device for tensioning a length-wise moving thread comprising a plurality of fixed members in spaced alignment along the thread path, a plurality of movable magnetizable members substantially devoid of operative inertia spaced in alternation with said fixed members, said fixed and movable members being adapted to tension said thread by frictional contact therewith as the thread is drawn past and alternately about said fixed and movable members in a partial wrap about each, and a magnet urging said movable members with a variable force transversely of said thread path to increase the angle of each said partial wrap, said force increasing as, said movable members move 'in a direction to result'in a greater degree of wrap and decreasing as they move in the opposite direction.
  • a device for tensioning a travelling thread comprising a multiplicity of mutually spaced stationary tenbers respectively disposed between each two of said stationary members and being yieldingly displaceable in a direction transverse to the alignment yond said alignment for causing the thread to form at each stationary area an angle of wrap variable in depend ence upon the position of said respective movable members, said movable members being magnetizable and being individually disposed in the field of said magnet for tension-responsive movement toward and away from said magnet whereby said magnet imposes upon said movable members a variable biasing force in said direction and substantially proportional to the variations in the tension of the thread at said movable members, said movable members having a natural oscillation frequency higher than the frequency range of the variations in thread tension, whereby the variations in thread tension cause displacement of said movable members in opposition to said force to vary said angles in the tension equalizing sense.
  • said stationary members being disposed below the thread path
  • said magnetizable movable members consisting of respective pins movable independently of one another and extending transversely of the thread path to rest upon the thread when the device is in operation, and said magnet being stationarily disposed beneath the thread path.
  • each device having said stationary members disposed below the thread path and having said magnetizable movable members consisting of respective pins individually movable and extending transversely of the thread path to rest upon the thread when the device is in operation, said magnet being an electromagnet disposed beneath the thread path, said electromagnets having respective energizing coils, and an electric energizing circuit connected with said coils and having a current control member for adjusting the intensity of said magnet fields to simultaneously adjust said devices.

Landscapes

  • Tension Adjustment In Filamentary Materials (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US160604A 1949-08-03 1950-05-08 Thread tensioning device Expired - Lifetime US2754071A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP51009A DE893321C (de) 1949-08-03 1949-08-03 Klauenbremse zum Spannen eines Fadens

Publications (1)

Publication Number Publication Date
US2754071A true US2754071A (en) 1956-07-10

Family

ID=6073014

Family Applications (1)

Application Number Title Priority Date Filing Date
US160604A Expired - Lifetime US2754071A (en) 1949-08-03 1950-05-08 Thread tensioning device

Country Status (7)

Country Link
US (1) US2754071A (de)
BE (1) BE498477A (de)
CH (1) CH292368A (de)
DE (1) DE893321C (de)
FR (1) FR1026209A (de)
GB (1) GB697329A (de)
NL (1) NL79851C (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2949757A (en) * 1958-06-23 1960-08-23 Scott & Williams Inc Knitting machine magnetic controlled yarn tension
US3011215A (en) * 1959-01-29 1961-12-05 Du Pont Process for removing non-uniformities in undrawn synthetic filaments
US3103567A (en) * 1961-01-10 1963-09-10 liebermann etal
US3300161A (en) * 1963-09-21 1967-01-24 Frau Sigrid Heim Control device
US3578256A (en) * 1967-09-12 1971-05-11 Strake Maschf Nv Yarn brake of the sling type
US4324371A (en) * 1980-11-03 1982-04-13 Oda Gosen Kogyo Kabushiki Kaisha Apparatus for controlling tension of filament yarn
US4880175A (en) * 1987-04-14 1989-11-14 Murata Kikai Kabushiki Kaisha Tension setting and controlling method and apparatus in an automatic winder
US4927093A (en) * 1988-01-15 1990-05-22 Gebrueder Loepfe Ag Method for braking a moving thread-like material and thread brake for carrying out said method
US5368244A (en) * 1989-10-16 1994-11-29 Iro Ab Thread brake
US6035667A (en) * 1992-03-16 2000-03-14 Nitto Glass Fiber Mfg. Co., Ltd. Method of making glass yarn with controlled tension

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1172998B (de) * 1954-06-01 1964-06-25 Deering Milliken Res Corp Fadenspannvorrichtungen an Spul- und anderen Textilmaschinen
DE1157978B (de) * 1958-07-18 1963-11-21 Debomi G M B H Fadenbremse mit mehreren Gruppen von Umlenkgliedern
CH368443A (de) * 1958-08-22 1963-03-31 Rueti Ag Maschf Fadenwächter für Textilmaschinen
DE6603318U (de) 1967-07-20 1969-09-18 Walter Dr Ing Reiners Rechenspanner fuer fadenfoermiges gut
DE2634251B1 (de) * 1976-07-30 1978-02-09 Schubert & Salzer Maschinen Vorrichtung zum aufwickeln eines mit konstanter geschwindigkeit gelieferten fadens

Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1303320A (en) * 1919-05-13 houghton
US1375568A (en) * 1920-02-10 1921-04-19 Patten Bros Inc Winding-machine
US1399521A (en) * 1921-01-14 1921-12-06 Rodger John Thread and yarn friction-guide
US1516885A (en) * 1922-12-26 1924-11-25 Lewis T Houghton Tension device
US1602447A (en) * 1924-03-24 1926-10-12 Walter E Olson Tension device for winding machines
US2005975A (en) * 1933-07-24 1935-06-25 Warp Compressing Machine Compa Thread tensioning device
US2104809A (en) * 1935-04-24 1938-01-11 Celanese Corp Device for twisting yarn
US2202323A (en) * 1938-10-14 1940-05-28 Woodruff T Sullivan Weft tension and loom stopping device
GB528386A (en) * 1939-04-26 1940-10-29 Courtaulds Ltd Improvements in and relating to tension devices for use in winding textile threads
US2223923A (en) * 1938-05-12 1940-12-03 Du Pont Thread production
US2223912A (en) * 1938-05-24 1940-12-03 Du Pont Thread production
US2283767A (en) * 1941-03-19 1942-05-19 Robert Reiner Inc Yarn tension device
US2326714A (en) * 1942-01-29 1943-08-10 Courtaulds Ltd Thread tensioning apparatus
US2343535A (en) * 1943-06-09 1944-03-07 Us Rubber Co Mechanism for twisting together a plurality of strands
US2393243A (en) * 1943-10-06 1946-01-22 Western Electric Co Strand handling apparatus and a method of handling strands
US2478926A (en) * 1947-12-20 1949-08-16 North American Rayon Corp Yarn tensioning device

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1303320A (en) * 1919-05-13 houghton
US1375568A (en) * 1920-02-10 1921-04-19 Patten Bros Inc Winding-machine
US1399521A (en) * 1921-01-14 1921-12-06 Rodger John Thread and yarn friction-guide
US1516885A (en) * 1922-12-26 1924-11-25 Lewis T Houghton Tension device
US1602447A (en) * 1924-03-24 1926-10-12 Walter E Olson Tension device for winding machines
US2005975A (en) * 1933-07-24 1935-06-25 Warp Compressing Machine Compa Thread tensioning device
US2104809A (en) * 1935-04-24 1938-01-11 Celanese Corp Device for twisting yarn
US2223923A (en) * 1938-05-12 1940-12-03 Du Pont Thread production
US2223912A (en) * 1938-05-24 1940-12-03 Du Pont Thread production
US2202323A (en) * 1938-10-14 1940-05-28 Woodruff T Sullivan Weft tension and loom stopping device
GB528386A (en) * 1939-04-26 1940-10-29 Courtaulds Ltd Improvements in and relating to tension devices for use in winding textile threads
US2283767A (en) * 1941-03-19 1942-05-19 Robert Reiner Inc Yarn tension device
US2326714A (en) * 1942-01-29 1943-08-10 Courtaulds Ltd Thread tensioning apparatus
US2343535A (en) * 1943-06-09 1944-03-07 Us Rubber Co Mechanism for twisting together a plurality of strands
US2393243A (en) * 1943-10-06 1946-01-22 Western Electric Co Strand handling apparatus and a method of handling strands
US2478926A (en) * 1947-12-20 1949-08-16 North American Rayon Corp Yarn tensioning device

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2949757A (en) * 1958-06-23 1960-08-23 Scott & Williams Inc Knitting machine magnetic controlled yarn tension
US3011215A (en) * 1959-01-29 1961-12-05 Du Pont Process for removing non-uniformities in undrawn synthetic filaments
US3103567A (en) * 1961-01-10 1963-09-10 liebermann etal
US3300161A (en) * 1963-09-21 1967-01-24 Frau Sigrid Heim Control device
US3578256A (en) * 1967-09-12 1971-05-11 Strake Maschf Nv Yarn brake of the sling type
US4324371A (en) * 1980-11-03 1982-04-13 Oda Gosen Kogyo Kabushiki Kaisha Apparatus for controlling tension of filament yarn
US4880175A (en) * 1987-04-14 1989-11-14 Murata Kikai Kabushiki Kaisha Tension setting and controlling method and apparatus in an automatic winder
US4927093A (en) * 1988-01-15 1990-05-22 Gebrueder Loepfe Ag Method for braking a moving thread-like material and thread brake for carrying out said method
US5368244A (en) * 1989-10-16 1994-11-29 Iro Ab Thread brake
US6035667A (en) * 1992-03-16 2000-03-14 Nitto Glass Fiber Mfg. Co., Ltd. Method of making glass yarn with controlled tension

Also Published As

Publication number Publication date
FR1026209A (fr) 1953-04-24
GB697329A (en) 1953-09-23
BE498477A (de) 1951-02-01
DE893321C (de) 1953-10-15
CH292368A (de) 1953-08-15
NL79851C (de) 1955-12-15

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