US2724065A - Magnetic drag for control of yarn tension - Google Patents

Magnetic drag for control of yarn tension Download PDF

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US2724065A
US2724065A US218323A US21832351A US2724065A US 2724065 A US2724065 A US 2724065A US 218323 A US218323 A US 218323A US 21832351 A US21832351 A US 21832351A US 2724065 A US2724065 A US 2724065A
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pulley
yarn
tension
magnetic
control
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US218323A
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Erwin J Saxl
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    • 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
    • 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
    • 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 processing apparatus for filamentous materials, yarn tensioning and has. par ticular reference to a tension control device for the filamentous materials.
  • the principal object of the invention is to provide a hysteresis torque tensioning device for filamentous materials such as yarn and the like.
  • Another object of the invention is to provide a magnetic tensioning device which is adjustable to provide a desired constant tension.
  • An additional object of the invention is to provide a light weight magnetic tensioning device which has very little rotary inertia, and is therefore suitable for light, sensitive yarns.
  • a further object of the invention is to provide means for tensioning a filamentous material in process, whereby said material is held under tension even when processing is stopped, and the material will not become unduly slack.
  • Fig. 1 is a diagrammatic layout illustrating the application of the tension control device to yarn for a warper
  • Fig. 3 is a side view of Fig. 2;
  • Fig. 4 is a section on the line 4-4 of Fig. 3;
  • Fig. 5 is a perspective enlarged view of the magnet housing of Fig. 2.
  • the device is preferably adjustable, whereby each position for warp yarns, for example, may be set to provide a uniform tension, or may be set to provide different tensions for particular yarns when special finishing effects are required.
  • I provide an adjustable magnetic field between a fixed magnet or magnets, and a pulley made of magnetic flux conducting material, such as iron, or magnetizable alloys of good magnetic permeability, the field intensity being varied by shifting the position of the magnet or magnets with respect to the pulley to adjust the air gap distance therebetween, the preferred shifting being axial and in small increments, as the field intensity varies essentially inversely as the square of the air gap distance.
  • Fig. l is a schematic layout of a tension control for one yarn for a warper section beam.
  • the yarn is drawn off one package 11 mounted on a warping frame cone creel, not shown, and passes through a guide 12 to the tension control device 13, and through a guide 14 to the section beam 15.
  • the tension control device 13 includes a fixedsupport 16, having a horizontal bore 17 in which I 2,724,065 Patented Nov. 15, 1955 a shoulder 29 against which a pulley 30 seats, the pulley having an inner metal disk 31 made of magnetizable material, a pulley portion 32 which preferably has an outer v groove 33 for receiving a yarn and a central passage 34 in which a roller bearing 35 of standard type seats against the disk 31, the passage 34 being closed to yarn fibres and the like by a washer 36 and a disk washer 37, the shaft end 28 being swaged to lock the pulley in place.
  • the combination of a V groove and an inner roller hearing reduces slippage of the yarn in the groove.
  • the bottom of the V groove may be covered with material or processed to reduce slippage of the yarn on the pulley.
  • the shaft 18 When a yarn 10 is passed around the pulley 30, the shaft 18 is shifted in its support 16 to align the pulley with the guides 12 and 14; the magnet housing 20 is then shifted axially to provide the proper air gap between the magnet device 24 and the pulley disk 31, whereby a definite magnetic restraining force is exerted on the pulley as it turns due to pull on the yarn, to provide a constant tension on the yarn.
  • the pulley being light weight, there is little inertia, whereby the tension control device is sensitive in response to acceleration when the machine is started or stopped under tension. Since the number of parts is small, and the parts are readily assembled, the cost of manufacture is low.
  • the tension control device may be used for other yarns, wires, and threads, such as nylon and other plastic threads.
  • the application of a constant tension to the manufacture of nylon threads is advantageous, as the threads can be given a controlled stretch, particularly while in a plastic state during manufacture, and the micelles thereby oriented to greatly increase breaking strength and elasticity of the synthetic yarn.
  • a tension control device for warp yarns and other filamentous materials having a shaft support and a shaft with one end secured in said support, a yarn engageable pulley rotatably mounted at the other end of the shaft, theinner face of said pulley including magnetic flux conducting material, and a magnet carrier slidably mounted on said shaft between the support and the pulley for adjustable locking in set position adjacent the pulley, said carrier having a magnet device on its face contiguous the inner face of the pulley, whereby an air gap of predetermined spacing is provided between the magnetic flux conducting material of the pulley and the magnet device of the carrier and rotation of the pulley by engagement of the yarn therewith creates a magnetic drag.
  • said magnet device including two spaced bar magnets.

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  • Tension Adjustment In Filamentary Materials (AREA)

Description

Nov. 15, 1955 s 2,724,065
MAGNETIC DRAG FOR CONTROL OF YARN TENSION Filed March 50, 1951 N V EN TOR.
ATTORNEY United States Patent O 1 2,724,065 MAGNETIC DRAG FOR CONTROL OF YARN TENSION Erwin J. Saxl, Harvard, Mass. Application March 30, 1951, Serial No. 213,323 2 Claims. (Cl. 316-93) The present invention relates to processing apparatus for filamentous materials, yarn tensioning and has. par ticular reference to a tension control device for the filamentous materials.
The principal object of the invention is to provide a hysteresis torque tensioning device for filamentous materials such as yarn and the like.
Another object of the invention is to provide a magnetic tensioning device which is adjustable to provide a desired constant tension.
An additional object of the invention is to provide a light weight magnetic tensioning device which has very little rotary inertia, and is therefore suitable for light, sensitive yarns.
A further object of the invention is to provide means for tensioning a filamentous material in process, whereby said material is held under tension even when processing is stopped, and the material will not become unduly slack.
With the above and other objects and advantageous features in view, the invention consists of a novel arrangement of parts more fully disclosed in the detailed description following, in conjunction with the accompanying drawings, and more specifically defined in the claims appended thereto.
In the drawings,
Fig. 1 is a diagrammatic layout illustrating the application of the tension control device to yarn for a warper;
Fig. 2 is a side view of a preferred embodiment of the tension control device;
Fig. 3 is a side view of Fig. 2;
Fig. 4 is a section on the line 4-4 of Fig. 3; and
Fig. 5 is a perspective enlarged view of the magnet housing of Fig. 2.
It has been found desirable to provide a light weight magnetic tension control device, for obtaining a desired tension on warp yarns, winding machines and the like. The device is preferably adjustable, whereby each position for warp yarns, for example, may be set to provide a uniform tension, or may be set to provide different tensions for particular yarns when special finishing effects are required. To this end, I provide an adjustable magnetic field between a fixed magnet or magnets, and a pulley made of magnetic flux conducting material, such as iron, or magnetizable alloys of good magnetic permeability, the field intensity being varied by shifting the position of the magnet or magnets with respect to the pulley to adjust the air gap distance therebetween, the preferred shifting being axial and in small increments, as the field intensity varies essentially inversely as the square of the air gap distance.
Referring to the drawings, Fig. l is a schematic layout of a tension control for one yarn for a warper section beam. The yarn is drawn off one package 11 mounted on a warping frame cone creel, not shown, and passes through a guide 12 to the tension control device 13, and through a guide 14 to the section beam 15.
The tension control device 13, see Fig. 2, includes a fixedsupport 16, having a horizontal bore 17 in which I 2,724,065 Patented Nov. 15, 1955 a shoulder 29 against which a pulley 30 seats, the pulley having an inner metal disk 31 made of magnetizable material, a pulley portion 32 which preferably has an outer v groove 33 for receiving a yarn and a central passage 34 in which a roller bearing 35 of standard type seats against the disk 31, the passage 34 being closed to yarn fibres and the like by a washer 36 and a disk washer 37, the shaft end 28 being swaged to lock the pulley in place. The combination of a V groove and an inner roller hearing reduces slippage of the yarn in the groove. The bottom of the V groove may be covered with material or processed to reduce slippage of the yarn on the pulley.
When a yarn 10 is passed around the pulley 30, the shaft 18 is shifted in its support 16 to align the pulley with the guides 12 and 14; the magnet housing 20 is then shifted axially to provide the proper air gap between the magnet device 24 and the pulley disk 31, whereby a definite magnetic restraining force is exerted on the pulley as it turns due to pull on the yarn, to provide a constant tension on the yarn.
The pulley being light weight, there is little inertia, whereby the tension control device is sensitive in response to acceleration when the machine is started or stopped under tension. Since the number of parts is small, and the parts are readily assembled, the cost of manufacture is low.
- Although particularly applicable to warpers, the tension control device may be used for other yarns, wires, and threads, such as nylon and other plastic threads. The application of a constant tension to the manufacture of nylon threads is advantageous, as the threads can be given a controlled stretch, particularly while in a plastic state during manufacture, and the micelles thereby oriented to greatly increase breaking strength and elasticity of the synthetic yarn.
Although I have disclosed a specific constructional embodiment of the invention, it is obvious that changes in the size, shape and arrangement of the parts may be made to suit different tension control requirements, without departing from the spirit and the scope of the invention as defined in the appended claims.
I claim:
1. In a tension control device for warp yarns and other filamentous materials having a shaft support and a shaft with one end secured in said support, a yarn engageable pulley rotatably mounted at the other end of the shaft, theinner face of said pulley including magnetic flux conducting material, and a magnet carrier slidably mounted on said shaft between the support and the pulley for adjustable locking in set position adjacent the pulley, said carrier having a magnet device on its face contiguous the inner face of the pulley, whereby an air gap of predetermined spacing is provided between the magnetic flux conducting material of the pulley and the magnet device of the carrier and rotation of the pulley by engagement of the yarn therewith creates a magnetic drag.
2. In the combination of claim 1, said magnet device including two spaced bar magnets.
References Cited in the file of this patent UNITED STATES PATENTS 296,212 Park Apr. 1, 1884 847,597 Onsum Mar. 19, 1907 1,465,584 Cullough Aug. 21, 1923 2,293,748 Johnson Aug. 25, 1942 2,361,239 Ransom Oct. 24, 1944 2,431,908 Bartelson Dec. 2, 1947 2,519,882 Bullard et a1 Aug. 22, 1950 2,566,743 Okulitch Sept. 4, 1951 2,614,773 Ammerall Oct. 21, 1952 FOREIGN PATENTS 225,541 Switzerland May 1, 1943
US218323A 1951-03-30 1951-03-30 Magnetic drag for control of yarn tension Expired - Lifetime US2724065A (en)

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2768796A (en) * 1954-08-12 1956-10-30 Levine Paul Magnetic thread-tensioners
US2869658A (en) * 1955-03-15 1959-01-20 Wesley B Drevitson Tractor for controlling movement of the human hand
US3314620A (en) * 1964-09-28 1967-04-18 Leesona Corp Yarn guide
US3323302A (en) * 1964-02-13 1967-06-06 Bear Brand Hosiery Co Method for producing yarn
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
US4449355A (en) * 1982-10-18 1984-05-22 Milliken Research Corporation A.C.-D.C. Slotted 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
US4456160A (en) * 1980-10-27 1984-06-26 Basf Aktiengesellschaft Guide device for a recording medium in tape form, especially a magnetic tape
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
FR2543523A1 (en) * 1983-03-29 1984-10-05 Tanac Eng Kk MAGNETIC VOLTAGE DEVICE FOR APPLYING A VOLTAGE TO THE WIRE DURING ITS WINDING
US4478036A (en) * 1983-02-22 1984-10-23 Milliken Research Corporation Method, apparatus and intermittently textured yarn
FR2558813A1 (en) * 1984-01-31 1985-08-02 Palitex Project Co Gmbh DEVICE FOR MODIFYING THE TENSION STRENGTH OF A CIRCULATING WIRE
US4532760A (en) * 1984-02-21 1985-08-06 Milliken Research Corporation D. C. Yarn tension control
WO1990005690A1 (en) * 1988-11-21 1990-05-31 Heino Hautio Roll brake
US20080295625A1 (en) * 2006-02-07 2008-12-04 Ntn Corporation Supporting Structure of Ball Screw Shaft

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US296212A (en) * 1884-04-01 Electro-magnetic car-brake
US847597A (en) * 1906-01-12 1907-03-19 Peter Onsum Governor.
US1465584A (en) * 1922-11-09 1923-08-21 Mccullough Oswell Electric brake
US2293748A (en) * 1941-10-29 1942-08-25 William J Johnson Magnetic brake
CH225541A (en) * 1941-07-05 1943-02-15 Schlafhorst & Co W Tensioner for continuous textile threads.
US2361239A (en) * 1943-04-28 1944-10-24 Gen Electric Fishing reel
US2431908A (en) * 1944-07-29 1947-12-02 Rca Corp Motion-picture projector fire shutter
US2519882A (en) * 1948-04-30 1950-08-22 Gen Electric Constant torque device
US2566743A (en) * 1949-10-24 1951-09-04 Okulitch George Joseph Magnetic drive agitator
US2614773A (en) * 1950-11-20 1952-10-21 Mohawk Carpet Mills Inc Tension device

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US296212A (en) * 1884-04-01 Electro-magnetic car-brake
US847597A (en) * 1906-01-12 1907-03-19 Peter Onsum Governor.
US1465584A (en) * 1922-11-09 1923-08-21 Mccullough Oswell Electric brake
CH225541A (en) * 1941-07-05 1943-02-15 Schlafhorst & Co W Tensioner for continuous textile threads.
US2293748A (en) * 1941-10-29 1942-08-25 William J Johnson Magnetic brake
US2361239A (en) * 1943-04-28 1944-10-24 Gen Electric Fishing reel
US2431908A (en) * 1944-07-29 1947-12-02 Rca Corp Motion-picture projector fire shutter
US2519882A (en) * 1948-04-30 1950-08-22 Gen Electric Constant torque device
US2566743A (en) * 1949-10-24 1951-09-04 Okulitch George Joseph Magnetic drive agitator
US2614773A (en) * 1950-11-20 1952-10-21 Mohawk Carpet Mills Inc Tension device

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2768796A (en) * 1954-08-12 1956-10-30 Levine Paul Magnetic thread-tensioners
US2869658A (en) * 1955-03-15 1959-01-20 Wesley B Drevitson Tractor for controlling movement of the human hand
US3323302A (en) * 1964-02-13 1967-06-06 Bear Brand Hosiery Co Method for producing yarn
US3314620A (en) * 1964-09-28 1967-04-18 Leesona Corp Yarn guide
US4456160A (en) * 1980-10-27 1984-06-26 Basf Aktiengesellschaft Guide device for a recording medium in tape form, especially a magnetic tape
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
US4449355A (en) * 1982-10-18 1984-05-22 Milliken Research Corporation A.C.-D.C. Slotted 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
US4457129A (en) * 1982-10-18 1984-07-03 Milliken Research Corporation Slotted disc type yarn tension control
US4449356A (en) * 1982-11-10 1984-05-22 Milliken Research Corporation Continuous A.C. tension control
US4478036A (en) * 1983-02-22 1984-10-23 Milliken Research Corporation Method, apparatus and intermittently textured yarn
FR2543523A1 (en) * 1983-03-29 1984-10-05 Tanac Eng Kk MAGNETIC VOLTAGE DEVICE FOR APPLYING A VOLTAGE TO THE WIRE DURING ITS WINDING
US4526329A (en) * 1983-03-29 1985-07-02 Tanac Engineering Kabushiki Kaisha Magnetic tensioning device
FR2558813A1 (en) * 1984-01-31 1985-08-02 Palitex Project Co Gmbh DEVICE FOR MODIFYING THE TENSION STRENGTH OF A CIRCULATING WIRE
US4532760A (en) * 1984-02-21 1985-08-06 Milliken Research Corporation D. C. Yarn tension control
WO1990005690A1 (en) * 1988-11-21 1990-05-31 Heino Hautio Roll brake
US20080295625A1 (en) * 2006-02-07 2008-12-04 Ntn Corporation Supporting Structure of Ball Screw Shaft
US8141445B2 (en) * 2006-02-07 2012-03-27 Ntn Corporation Supporting structure of ball screw shaft

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