US3593508A - Apparatus for imparting a predetermined value of twist to a material - Google Patents

Apparatus for imparting a predetermined value of twist to a material Download PDF

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Publication number
US3593508A
US3593508A US731454A US3593508DA US3593508A US 3593508 A US3593508 A US 3593508A US 731454 A US731454 A US 731454A US 3593508D A US3593508D A US 3593508DA US 3593508 A US3593508 A US 3593508A
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United States
Prior art keywords
cable
imparting
twist
torque
predetermined
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Expired - Lifetime
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US731454A
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English (en)
Inventor
Ludwik Jachimowicz
Adolf S Knott
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General Cable Corp
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General Cable Corp
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Publication date
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    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines
    • D07B7/02—Machine details; Auxiliary devices
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B3/00—General-purpose machines or apparatus for producing twisted ropes or cables from component strands of the same or different material
    • D07B3/08—General-purpose machines or apparatus for producing twisted ropes or cables from component strands of the same or different material in which the take-up reel rotates about the axis of the rope or cable or in which a guide member rotates about the axis of the rope or cable to guide the rope or cable on the take-up reel in fixed position and the supply reels are fixed in position
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines
    • D07B7/02—Machine details; Auxiliary devices
    • D07B7/022—Measuring or adjusting the lay or torque in the rope

Definitions

  • a braking means is associated with the cable twisting unit to vary the twisting force transferred by the twist imparting means to the cable and is controlled by a twist sensor sensing variations from the predetermined twist.
  • This invention relates to an apparatus for imparting twist to a multistrand cable and more particularly for imparting a predetermined value of twist to successive portions of a cable during takeup.
  • the belt will pull on the cable untwisting it with whatever force is needed to provide sufficient lengths of belt 'to compensate for the change in linear progress of the cable.
  • the belt will have a tendency to damage the insulation of the cable when there are surges in the linear progress of the cable.
  • the flat belt utilized by the Reichelt apparatus can be applied to the cable core only at a fixed angle appropriate for the speed of rotation and cable diameter. If these conditions change, the angle must be adjusted or the belt will not lie parallel to the surface of the cable and as a result, one edge of the belt will buckle and the other edge will cut into the insulation of the cable core.
  • the present invention provides an apparatus for imparting a predetermined twist to a multistrand cable by applying to the cable a controlled torque.
  • a cable will have a longer lay away from'the takeup cradle and reel than at the takeup cradle and reel.
  • a torsion force of predetermined value must be applied to the cable prior to takeup in addition to that produced by operation of the takeup cradle and reel. If this force is substantially constant and independent of irregularities in the advance of the cable, then the'lay will be substantially the same at any point along the cable.
  • a cable twisting unit is mounted for rotation about the axis of the cable and includes a twist imparting means of flexible cylindrical material of endless length having a winding path of a plurality of helical turns around said cable and in engagement with said cable transmitting twisting force to said cable to provide a predetermined twist in said cable.
  • Braking means associated with the cable twisting unit varies the twisting force transferred by the twist imparting means to the cable in response to variations from the predetermined twist as detected by a twist sensor.
  • slack compensator is provided in engagement with the twist imparting means and responsive to variations in the length of the'winding path of said twist imparting means to maintain the twist imparting means relatively taut.
  • FIG. 1 is a side elevational view of a cable twisting apparatus in accordance with the present invention.
  • FIG. 2 is a force diagram showing the manner in which the twist force is imparted to the cable.
  • FIG. 3 is a sectional view of the'unit as taken along the line Ill-Ill of FIG. I.
  • FIG. 4 is a schematic view of'the control circuit by which the twisting force imparted to the cable is varied responsively to variations from predetermined twist.
  • FIG. 5 is a diagrammatic view of the photocell unit ofa twist sensorfor determining variations from predetermined twist.
  • FIG. I of the drawings several cable com ponents I from payoff reels (not shown) pass through stationary apertured face plate 2 and a closing die 3 into engagement with one another to form a multistrand cable 4.
  • the cable 4 progresses from left to right and the right-hand end of the cable is twisted as shown by an arrow A, to provide a lefthanded twisted cable at a distance spaced from the closing die 3.
  • the cable enters takeup cradle 7 and advances to and is wound onto a takeup reel (not shown).
  • the cradle and reel may be of a construction known in the art such as that shown in US. Pat. No. 3,251,179 to L. O. Reichelt et al.
  • the rotation of the cradle 7 effects the twisting of the portion of the moving cable 4 which extends from the stationary closing die 3 to the takeup cradle 7.
  • the twisting of the cable 4 by the cradle 7 is such that the cable has a longer lay away from the cradle than adjacent the cradle.
  • a cable twisting unit is located between takeup cradle 7 and the closing die 3 and at a predetermined distance from the latter and serves to apply an additional amount of twist of predetermined value to successive portions of cable 4.
  • two cable twisting units 12, diametrically opposed are utilized to impart a predetermined twist to cable 4. Since cable twisting units 12 are identical the description of one will apply to the other.
  • the cable twisting unit 12 is mounted on rotary frame 14 for rotation about the axis of cable 4 in bearings 15 and 16.
  • the cable twisting unit 12 includes a twist imparting means of flexible cylindrical material of endless length such as rope l7 coursing a helical winding path 18 of a plurality of helical turns around and in engagement with cable 4 with the length of said winding path being the distance between the point of entry of rope 17 into engagement with cable 4 and the point of exit of rope 17 from engagement with cable 4.
  • the rope I7 is directed onto the cable by sheave 22.
  • the rope 17 is received by and passes over sheave 23 and slack compensation sheave 24 back to sheave 22.
  • Sheave 24 is connected by a spring 25 to a mounting block 26 attached to frame 14.
  • a braking means 30, which may be a magnetic brake or clutch, is mounted on frame 14 in association with sheave 22 to apply a predetermined tension to the rope 17, causing the rope 17 to impart a predetermined value of twist to cable 4.
  • spring 25 allows sheave 24 to move longitudinally of the axis of cable 4 responsive to variations in the change in length of the winding path 18 thereby maintaining substantially constant tension in rope l7 and imparting the predetermined value of twist to cable 4.
  • the force F applied to cable 4 by rope l7 resolves into the forcesf, and f, the latter acting longitudinally along the cable axis and the former being tangential to the cable circumference
  • the rope 17 has a sufficient number of turns around cable 4 to provide slipless contact between rope 17 and cable 4.
  • the number of turns required is a function of the coefficient of friction of the rope 17 against the cable 4 and the tension applied to the rope 4 by braking means 30.
  • the rope I7 is a flexible cylindrical material, it is capable of compressing the strands of cable 4 into a substantially cylindrical configurations not obtainable by other twist imparting means without damage to the strands of cable 4.
  • the angle at which the rope is directed onto the cable is an acute angle of small measure.
  • the angle a will vary and the sheave 24 will be caused to move longitudinally of the axis of the cable 4, responsive to variations in the winding path, in order to take up the excess length of rope l7 and keep tension in the rope substantially constant.
  • the angle a from 12 to 23 and the ratiofl/F RF from 97 to 92 percent.
  • the angle of entry of the rope onto the cable varies, but the speed of rotation of the frame is fixed in a ratio to the speed of the cradle.
  • the angle of entry of the rope onto the cable is fixed, and the rotation of the frame 14 in FIG. 1 must be increased as the cable diameter decreases, and the rotation of frame 14 must be decreased as the cable diameter increases. While this alternative embodiment enables the utilization of a large ratio f,/F as high as 97 percent for all cable diameters, it requires more control by the machine operator.
  • the embodiment ofthe invention shown in H6. I is self-adjusting within minor irregularities of the machine run so that no elaborate control and feedback mechanisms are needed.
  • the field winding 32 of the braking means 30 is shown connected to a source of DC voltage 35 by terminal leads 36 and 37.
  • the DC voltage is achieved through the use of a full wave rectifier 38 rectifying a 1 l v. source of AC voltage.
  • Field winding 32 is connected to rectifier 38 and in series with control rheostat 40, and a field rheostat 42 through terminal leads 36 and 37.
  • the field rheostat 42 will be set at one of the terminals a, b, c, d or e.
  • the field flux of braking means 30 will be increased or decrease, thus increasing or decreasing the braking force of braking means 30 and the tension applied to rope l7.
  • the field rheostat 42 is set at terminal 12 causing braking means 30 to apply a predetermined tension to rope 17 to impart a predetermined twist in cable 4 thereby establishing a predetermined lay in the cable between the cable twisting unit I2 and the takeup cradle 7.
  • a twist sensor unit 44 is caused to operate the control rheostat 40.
  • the means to detect the substantial variance from the predetermined lay of cable 4 is shown diagrammatically in FIG. 5 as three photocells 46, 47 and 48 which comprise the detection portion of twist sensor 44. The photocells are located at a fixed distance from a printing wheel 49 which distance is equal to the predetermined lay of the cable.
  • the printing wheel 49 will imprint on the cable a legend or symbol to be detected by the photocells 46.
  • the lay of the legend corresponds to the lay of the cable 4.
  • twist sensor 44 is actuated and depending upon whether the legend is in the view of photocell 47 or 48, twist sensor 44 recognizes that the lay of the legend is shorter or longer than the predetermined lay of the cable.
  • the twist sensor 44 operates the control rheostat 40 so that where the lay is longer than the predetermined value of lay, i.e.
  • the setting of control rheostat 40 will be decreased changing the value of field flux and thus increasing the braking force of braking means 30.
  • the increase in braking force will increase the tension applied to rope 17 causing it to impart increased twisting force to cable 4.
  • twist sensor 44 is deactuated.
  • FIG. 1 shows two cable twisting units disposed diametrically opposite each other which will produce the desired predetermined twist in cable 4.
  • more than one rope could be run off sheave 22.
  • Rope 17 could be replaced by three or more ropes, all directed from sheave 22 and each having their own takeup sheaves 23 and slack compensating sheaves 24.
  • Apparatus for imparting a predetermined twist to a multistrand cable during takeup comprising:
  • a cable twisting unit including a frame mounted for rotation about the axis of said cable and including also a torque imparting means having an element of endless length and coursing a winding path of a plurality of helical turns around said cable and in engagement with said cable for transmitting torque to said cable to provide a predetermined twist in the said cable; said endless element being movable with respect to the frame along said winding path, and
  • braking means associated with said cable twisting unit and opposing movement of the endless element along said winding path to apply a controlled torque to the cable by said endless element.
  • twist imparting means are made of flexible cylindrical material and the cable twisting unit includes first means to direct said torque imparting means onto said cable and second means to receive said torque imparting means from said cable.
  • the apparatus for imparting a predetermined twist in said cable claimed in claim 4 wherein said first means is a sheave and said second means is also a sheave, and the twisting unit includes also slack compensation means, in engagement with said torque imparting means and responsive to variations in the length of the winding path of said torque imparting means to maintain substantially constant tension in said torque imparting means.
  • slack compensation means comprises a sheave in engagement with said torque imparting means and moveable longitudinally of the axis of said cable and responsive to variations in the length of the winding path of said torque imparting means to maintain substantially constant tension in said torque imparting means.
  • twist sensor comprises photocell means to sense variations in the lay of said cable and circuit means connected to said magnetic clutch and actuated by said photocell means to vary the flux of said magnetic clutch in response to variations in said lay.
  • first and second cable torque imparting means mounted on the frame and diametrically opposite one from the other for common orbital rotation about the axis of said cable and each including an endless length element of flexible cylindrical material coursing a winding path of a plurality of helical turns around said cable and in engagement with said cable transmitting torque to said cable to provide a predetermined twist in said cable, each cable torque imparting means including a first sheave to direct the endless length element onto said cable, a second sheave to receive said endless length element from said cable, a third sheave adapted to receive said endless length element from said second sheave and to guide said endless length element to said first sheave and movable longitudinally of the axis of said cable in response to variations in the length of the winding path of said endless length element to maintain substantially constant tension in said endless length element;
  • the braking means including magnetic clutch means associated with said first and second cable torque imparting means to vary the torque transferred by each of said endless length elements to said cable; and c. the twist sensor having first means to sense variations in the lay of said cable and second means connected with said magnetic clutch means to vary the flux of said magnetic clutch means in response to variations in said lay.

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  • Ropes Or Cables (AREA)
US731454A 1968-05-23 1968-05-23 Apparatus for imparting a predetermined value of twist to a material Expired - Lifetime US3593508A (en)

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Application Number Priority Date Filing Date Title
US73145468A 1968-05-23 1968-05-23

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US3593508A true US3593508A (en) 1971-07-20

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Country Link
US (1) US3593508A (de)
CH (1) CH493690A (de)
DE (1) DE1925991A1 (de)
ES (1) ES367586A1 (de)
FR (1) FR2009172A1 (de)
GB (1) GB1269526A (de)
SE (1) SE360127B (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4015414A (en) * 1974-06-12 1977-04-05 The Warner & Swasey Textile Machine Company Monitored twist control apparatus and method
EP0182350A2 (de) * 1984-11-20 1986-05-28 SHINKO KOSEN KOGYO KABUSHIKI KAISHA also known as SHINKO WIRE CO.LTD. Verfahren und Vorrichtung zum Nachstellen der Schlaglänge von Drahtseilen
US4715582A (en) * 1985-04-03 1987-12-29 The Furukawa Electric Co., Ltd. Method of winding optical cable on aerial wire
US4903473A (en) * 1988-09-01 1990-02-27 Stolberger Maschinenfabrik Gmbh & Co Kg Method for controlling a cage stranding machine
US20060000618A1 (en) * 2004-07-01 2006-01-05 Schlumberger Technology Corporation Line Slack Compensator
US10118808B2 (en) * 2013-06-18 2018-11-06 Siemag Tecberg Gmbh Load-compensating rope sheave arrangement

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5428984Y2 (de) * 1973-08-31 1979-09-17
FR2499054B1 (fr) * 1981-01-30 1987-04-10 Illinois Tool Works Mecanisme d'entrainement lineaire d'un cable
FR2549695B1 (fr) * 1983-07-25 1985-12-13 Boussac Saint Freres Bsf Cordage pour le captage de naissains de mollusques marins et l'elevage de ces mollusques, ses procedes de fabrication et dispositif utilises
FR2567864A1 (fr) * 1984-07-19 1986-01-24 Sciard Alain Dispositif de traction lineaire pour le deplacement de charges telles que tiges, tuyaux rigides ou flexibles, cables ou plus generalement des objets dont les dimensions axiales sont importantes par rapport a leurs dimensions transversales
DE3914330A1 (de) * 1989-04-29 1990-10-31 Drahtcord Saar Gmbh & Co Kg Verfahren und vorrichtung zur herstellung eines drahtbuendels oder eines seils

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3251179A (en) * 1963-12-26 1966-05-17 Western Electric Co Material twisting apparatus
US3362149A (en) * 1966-01-24 1968-01-09 Bancroft & Sons Co J Method and apparatus for making yarn in a continuous helical spiral
US3406231A (en) * 1964-01-20 1968-10-15 Owens Corning Fiberglass Corp Method for production of tubular fibrous bodies

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3251179A (en) * 1963-12-26 1966-05-17 Western Electric Co Material twisting apparatus
US3406231A (en) * 1964-01-20 1968-10-15 Owens Corning Fiberglass Corp Method for production of tubular fibrous bodies
US3362149A (en) * 1966-01-24 1968-01-09 Bancroft & Sons Co J Method and apparatus for making yarn in a continuous helical spiral

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4015414A (en) * 1974-06-12 1977-04-05 The Warner & Swasey Textile Machine Company Monitored twist control apparatus and method
EP0182350A2 (de) * 1984-11-20 1986-05-28 SHINKO KOSEN KOGYO KABUSHIKI KAISHA also known as SHINKO WIRE CO.LTD. Verfahren und Vorrichtung zum Nachstellen der Schlaglänge von Drahtseilen
EP0182350A3 (en) * 1984-11-20 1987-11-25 Shinko Kosen Kogyo Kabushiki Kaisha Also Known As Shinko Wire Co. Ltd. Method and apparatus for adjusting lay of wire rope
US4715582A (en) * 1985-04-03 1987-12-29 The Furukawa Electric Co., Ltd. Method of winding optical cable on aerial wire
US4903473A (en) * 1988-09-01 1990-02-27 Stolberger Maschinenfabrik Gmbh & Co Kg Method for controlling a cage stranding machine
US20060000618A1 (en) * 2004-07-01 2006-01-05 Schlumberger Technology Corporation Line Slack Compensator
US7311154B2 (en) * 2004-07-01 2007-12-25 Schlumberger Technology Corporation Line slack compensator
US10118808B2 (en) * 2013-06-18 2018-11-06 Siemag Tecberg Gmbh Load-compensating rope sheave arrangement

Also Published As

Publication number Publication date
FR2009172A1 (de) 1970-01-30
SE360127B (de) 1973-09-17
CH493690A (de) 1970-07-15
DE1925991A1 (de) 1969-12-04
ES367586A1 (es) 1971-06-16
GB1269526A (en) 1972-04-06

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