US3643411A - Method and apparatus including a rotating intermediate storer for sz twisting of elements of a cable - Google Patents

Method and apparatus including a rotating intermediate storer for sz twisting of elements of a cable Download PDF

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Publication number
US3643411A
US3643411A US6663A US3643411DA US3643411A US 3643411 A US3643411 A US 3643411A US 6663 A US6663 A US 6663A US 3643411D A US3643411D A US 3643411DA US 3643411 A US3643411 A US 3643411A
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Prior art keywords
twisting
storer
elements
twisted
brackets
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Expired - Lifetime
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US6663A
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English (en)
Inventor
Dieter Vogelsberg
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Siemens AG
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Siemens AG
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/02—Stranding-up
    • H01B13/0235—Stranding-up by a twisting device situated between a pay-off device and a take-up device
    • H01B13/0242—Stranding-up by a twisting device situated between a pay-off device and a take-up device being an accumulator

Definitions

  • the invention relates to a method and apparatus for SZ twisting of elements of a cable, More particularly, the invention relates to a method and apparatus including a rotating intermediate storer for S2 twisting of elements of a cable.
  • the mag nitude and direction of twisting of the longitudinal section of the elements stored in the rotating intermediate storer depend solely on the direction of rotation and the number of revolutions of said intermediate storer, at a constant rate at which said elements pass through said intermediate storer.
  • ln twisting apparatus comprising an intermediate storer having a plurality of guide rollers whose direction of rotation is changed in accordance with the stored length, the aforedescribed fact results in the occurrence of reversal points in the strands within said intermediate storer; The strands may thus easily become twisted on the guide rollers during their passage through the intermediate storer.
  • the principal object of the invention is to provide a new and improved method and apparatus for S2 twisting of elements of a cable into a twisted unit.
  • An object of the invention is to provide a method of S2 twisting of elements of a cable into a twisted unit at increased speed.
  • An object of the invention is to provide a method and ap-. paratus for SZ twisting of elements of a cable into a twisted unit at a speed which is three times faster than. that of known units, for the same magnitude of the final strand, alternating in sections, and the same number of rotations executed by the twisting apparatus.
  • An object of the invention is to provide a method and apparatus for SZ twisting of elements of a cable into a twisted unit at a speed of manufacture which is 1% times the speed of manufacture of known apparatus.
  • An object of the invention is to provide a method and apparatus for S2 twisting of elements of a cable into a twisted unit which prevent reversal points in the twists in the intermediate storer.
  • An object of the invention is to provide a method and apparatus for S2 twisting of elements of a cable into a twisted unit which prevent twisting of reversal points in the strands in the intermediate storer without the necessity for special measures.
  • My invention provides a considerable improvement over the known SZ twisting methods and apparatus,
  • the elements ina method for S2 twisting of elements for communication cables into a single-twisted unit with a twisting direction which alternates by sections, the elements are twisted while being fed into a rotating intermediate storer.
  • the elements are withdrawn from the intermediate storer after the direction of rotation or the number rotations or speed of the intermediate storer have been changed.
  • the withdrawn section of the elements is superimposed by a second or additional, whereby a periodic change in the direction of rotation or the speed of the intermediate storer produces two sequential sections formed in different twisting directions.
  • the elements are fed to the intermediate storer, which intermediate storer rotates in alternating directions or speeds, with a superimposed pretwisting which is independent of the rotary movement of said intermediate storer.
  • the section of the elements withdrawn from the intermediate storer is superimposed with another or additional twist, independently of the rotary movement of said storer.
  • the method of the invention permits the selection of the magnitude and the direction of twisting of the longitudinal section of the elements stored in the intermediate storer, independently from the twisting which is provided solely due to the sectional change in the direction of rotation or the speed of said intermediate storer.
  • the pretwisting and the superimposition of the strand are effected in the same direction as that in which the elements are twisted while being fed to the intermediate storer and while being withdrawn therefrom.
  • the speed of production of the SZ- twisted elements may therefore be increased at the provided upper speed limit for the twisting apparatus and at the provided twisting, as compared to known SZ-twisting methods.
  • the elements are prestranded in constant direction. Simultaneously with the pretwisting of the elements, an additional twist is superimposed in constant direction on the section of elements withdrawn from the intermediate storer.
  • the level of the twist in the intermediate storer that is, the average value of the two twists which result from the change in speed of the various sections or from the alternation of the rotary direction of said intermediate storer, is shifted in either one or the other direction.
  • the shift or change in the level due to the pretwisting may be compensated'or cancelled out by the superimposition of an additional twist which over laps the section of elements withdrawn from the intermediate storer. In this event, the pretwisting serves only as an auxiliary magnitude or quantity during the SZ twisting of the elements.
  • pretwisting of the elements fed into the intermediate storer and the superimposing of the twist on the section of elements withdrawn from said intermediate storer be in opposite directions, but of equal magnitude. It is further expedient that the magnitudes be at least equal to the magnitude of the twisting provided during the feed in to or the withdrawal from the intermediate storer. This insures that the twist in the intermediate storer always has the same direction of twist independently of the speed or direction of rotation of the storer. This prevents the occurrence of reversal points in the intermediate storer and prevents the twisting of such reversal points in the twist without the access ity for special measures.
  • the twisting apparatus includes an intermediate storer which rotates in a direction or at a speed which changes alternately by sections.
  • the inter mediate storer is encircled by two tightly interconnected rotating or flying twisting brackets or stirrups.
  • One of the twisting brackets feeds or supplies the twisted elements to the intermediate storer.
  • the other of the twisting brackets withdraws or removes the elements from the intermediate storer.
  • twisting is effected by the apparatus of my invention essentially by the rotary movement of the intermediate storer.
  • the twisting brackets rotate around the intermediate storer and affect the magnitude and/or the direction of the twisting of the section stored in said intermediate storer.
  • the twisting apparatus of the invention which includes an intermediate storer which alternately changes its direction by sections, it is particularly advantageous that the rotary direction of the twisting brackets be opposite to the direction of rotation of the intermediate storer. This augments the twisting produced by the intermediate storer.
  • the elements passing through the twisting apparatus are twisted in a sextuple lay.
  • a first single lay is produced upon the supply of the elements to the twisting bracket which feeds said elements to the intermediate storer.
  • a first double lay is produced during the passage of the elements from the twisting bracket to the intermediate storer and a second double lay is produced during the passage of said elements from said intermediate storer to the twisting bracket which withdraws or removes said elements from said intermediate storer.
  • a second single lay is produced when the elements are withdrawn from the twisting bracket.
  • the apparatus of the invention Compared to known SZ-twisting apparatus, in which the intermediate storers change their direction of rotation by sections, the apparatus of the invention produces twists three times faster, providing the same magnitude or quantity for the final twist, alternating in sections, and with the same number of rotations completed by the twisting apparatus.
  • the apparatus of the invention operates at an increase of manufacturing speed which is one and one half times the speed of operation of the known apparatus.
  • a reversal point is a point at which the direction of the twisting reverses itself repeatedly. It is thus advantageous to prevent the occurrence of reversal points.
  • Reversal points may be reliably prevented by utilizing, in accordance with the invention, twisting apparatus whose twisting brackets rotate about the intermediate storer at constant speed and in constant rotary direction. The twisting produced by the twisting bracket which feeds or supplies the elements to the intermediate storer is compensated for or cancelled by the twisting which is produced by the twisting bracket which withdraws or removes said elements from said intermediate storer.
  • pretwisting and superimposition of the twisted elements while they are respectively fed into and withdrawn from the intermediate storer function as auxiliary magnitudes or quantities in order to produce a shift or change in the level of the strand located in said intermediate storer.
  • the elements are thus provided, prior to being fed into the intermediate storer, with constant pretwisting, which is superimposed by the twist occurring in alternately changing directions, in accordance with the sections of elements.
  • the twisting produced during the feed in of the elements to the twisting bracket must be of the same or greater magnitude than the twisting produced during the transfer of said elements from the twisting bracket to said intermediate storer. This means that the twisting brackets must rotate at a speed which is equal to or greater than half the speed of the intermediate storer.
  • FIG. 1 is a schematic diagram of an embodiment of the twisting apparatus of the invention utilized to perform the method of the invention.
  • FIG. 2 is a block diagram of an embodiment of the twisting apparatus of the invention for twisting a communication cable.
  • Elements 1, which may comprise, for example, four wires, are twisted by twisting apparatus 2. Elements comprising many wires such as, for example, pairs or fours, may be twisted into a single bunch.
  • the twisting apparatus 2 produces a twisted unit or group 3 such as, for example, a spiral quad.
  • the twisting apparatus 2 essentially comprises an intermediate storer 4. The direction of rotation of the intermediate storer 4 changes alternately by sections, depending upon the length of the twisted unit contained in said storer.
  • the twisting apparatus 2 further comprises twisting brackets or stirrups 5 and 6 which are tightly coupled to each other.
  • the intermediate storer 4 is pivotally mounted in a frame 19 having frame parts 18a and 18b.
  • the intermediate storer 4 is driven by an electric motor 7 mounted on the frame part 18a.
  • the interconnected twisting brackets 5 and 6 are pivotally mounted in the frame 19 via the frame parts 18a and 18b, and are driven by a motor 21 through a gear train 20, 22.
  • the elements 1 are fed are supplied to the twisting apparatus 2 from the left via a twisting nipple 8 and are transferred through a hollow shaft 9 having a shaft portion 9a and a shaft portion 9b, a pair of deflection rollers 10a and 11a and through the twisting bracket 5, which is hollow, to the intermediate storer 4.
  • the elements 1 are thus fed to the intermediate storer 4 from the right, via deflection rollers llb and 10b.
  • the intermediate storer 4 comprises a frame 12. Two groups of rollers 13a and 13b are mounted in the frame 12 at a specific distance from each other. The two groups of rollers 13a and 13b are mounted on parallel shafts. The elements 1 are fed or supplied to the intermediate storer via the aforedescribed components 8, 9, 10a, 11a, 5, 11b and 10b, and a deflection roller 14.
  • the elements 1 are withdrawn or removed from the intermediate storer 4 via a deflection roller 5 and are withdrawn from the twisting apparatus, toward the right, via a deflection roller 16a, a deflection roller 17a, the twisting bracket 6, which is hollow, a deflection roller 17b and a deflection roller 16b.
  • the number of rotations or revolutions, or speed, and the direction of rotation of the intermediate storer 4 and the twisting brackets 5 and 6 may be selected so that they are difierent from each other, with regard to their ratio.
  • the elements 1 are twisted together while being fed into the intermediate storer 4.
  • a section of the elements 1 having the same twisting direction and the same twist is located in the intermediate storer 4 and subsequently removed therefrom, via the deflection roller 15, in a different direction of rotation.
  • the rotating movement of the intermediate storer 4 be changed periodically in direction and that the period of constant rotation correspond to the passage of a section of elements 1 through the intermediate storer 4.
  • the periodic change of the direction of rotation results in the twisted elements 1 being alternately, by sections, with an S- twist, followed by a Z-twist, followed by an S-twist, followed by a Z-twist, and so on.
  • the direction of rotation of the twisting brackets 5 and 6 is also periodically changed in accordance with the length of elements in the intermediate storer 4.
  • the direction of rotation of the twisting brackets 5 and 6 is so selected that it is opposite to the direction of rotation of the intermediate storer 4.
  • the elements 1 may be fed or supplied to the intermediate storer 4 in triple lay and are withdrawn or removed from said storer in triple lay and the twists of the twisted unit, which are produced during the passing of the elements through the twisting brackets 5 and 6 and said storer 4 are all in the same direction.
  • Twisting apparatus of the type of the invention may thus produce SZ-twisted units at a maximum twisting at a considerably higher speed of manufacture than twisting apparatus which produce SZ twisting which changes by sections, only with the assistance of an intermediate storer which alternately changes its direction of rotation by sections.
  • the sections of said elements stored in said storer alternately comprise an S-twist and a Z-twist.
  • the twisting brackets 5 and 6 are preferably driven via a gear arrangement, not shown in the FlGS., coupled to the motor 7, which gear arrangement rotates said twisting brackets at constant speed and in a constant direction of rotation.
  • the elements are thereby fed or supplied to the intermediate storer 4 with constant prestranding.
  • An additional constant strand is superimposed on the elements withdrawn from the intermediate storer 4, with the assistance of the twisting brackets 5 and 6. Since the twisting brackets 5 and 6 rotate in a constant direction of rotation and at constant rotational speed, the additional twists produced with the assistance of said twisting brackets are opposed and of equal magnitude, so that they cancel each other.
  • the speed of said storer and of the twisting brackets 5 and 6 must be selected in a manner whereby the twisting which occurs during the feeding of the elements into the twisting bracket 5 is always greater than the twisting of said elements when they are being fed into the intermediate storer 4. Since the twisting bracket 5 and the intermediate storer 4 rotate, at times, in the same direction, the speed of the twisting brackets 5 and 6 must be greater than half the speed of said intermediate storer.
  • the elements are always supplied to said storer in the same direction, while some sections are either not twisted or are provided with a twist. if, on the other hand, the speed of rotation of the twisting brackets 5 and 6 is greater than half the speed of the intermediate storer 4, the elements 1 are fed into said storer in a manner whereby they are so twisted that they always have the same twisting direction, but some sections have a different twisting.
  • Twisting processes which were previously undertaken separately are, for example, the twisting of wires or elements into spiral quads and the subsequent twisting of the spiral quads into a basic bundle or bunch.
  • FIG. 2 The twisting of elements into SZ-twisted units in a single process step, as well as the subsequent twisting of the twisted units into a singletwisted group, is illustrated in FIG. 2. 1n P16. 2, each four elements or wires 10, 1b, 1n are fed at a constant speed into a corresponding one of a plurality of twisting apparatus 2a, 2b, 2n
  • the twisting apparatus 2a, 2b, 2n operate in parallel and each comprises the apparatus of the invention disclosed in FIG. 1.
  • the elements 1a are twisted into a twisted unit 3a, the elements 1b are twisted into a twisted unit 312, and so on.
  • Each of the twisted units 3a, 3b, 3n is twisted into, for example, a spiral squad.
  • Each twisting apparatus 2a, 2b, 2n comprises, identically with the twisting apparatus 2 of FIG. 1, an intermediate storer 4 which changes its direction of rotation in sections, and two twisting brackets 5 and 6 which rotate around said storer at constant speed and in constant direction of rotation.
  • the speeds of rotation of the twisting apparatus 2a, 2b, ..l 2n may be selected so that they vary.
  • the SZ-twisted units 3a, 3b, 3n are twisted during the same process step into a twisted group 21, which may comprise, for example, a basic bunch or bundle.
  • the twisted group 21 is provided by a twisting apparatus 211 which rotates at constant speed and in a constant direction of rotation.
  • the twisted group 21 is finally wound on a takeup drum 22 which rotates at constant speed and in constant direction of rotation.
  • the pretwisting and superimposing are efv fected in the same direction in which the twisted elements are twisted while being fed into or withdrawn from the storer.
  • Apparatus for S2 twisting of elements of a cable into a twisted unit in a twisting direction which alternates by sections, including means for twisting twisted units during feeding into a rotating intermediate storer from which they are withdrawn after a change in the rotary direction of the storer or after a change in the rotary speed of the storer, means for superimposing a second twist on the withdrawn section of twisted elements, and means for periodically changing the direction or speed of the storer to provide two successive sections of different stranding direction, said apparatus comprising an intermediate storer;
  • twisting brackets rotatably mounted for rotation around said intermediate storer and tightly coupled to each other, one of said twisting brackets supplying the twisted elements to said storer and the other of said twisting brackets withdrawing the twisted elements from said storer.
  • twisting brackets are coupled to said driving means and said driving means rotates said twisting brackets at a constant direction of rotation and a constant speed of rotation.
  • twisting brackets are coupled to said driving means and said driving means rotates said twisting brackets at a constant direction of rotation and a constant speed of rotation at least equal to half the speed of the intermediate storer.
  • said apparatus comprises a plurality of parallel operating systems each of said systems comprising an intermediate storer, driving means cou-' pled to said intermediate storer for rotating said storer at a speed and direction of rotation which changes by sections, and a pair of twisting brackets rotatably mounted for rotation around the intermediate storer and tightly coupled to each other, one of said twisting brackets supplying the elements to the storer and the other of said twisting brackets withdrawing the twisted elements from said storer, said apparatus further comprising additional twisting apparatus connected in common with said plurality of systems for twisting the twisted units provided by said systems into a twisted group in a singleoperating step.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Ropes Or Cables (AREA)
  • Processes Specially Adapted For Manufacturing Cables (AREA)
  • Wire Processing (AREA)
US6663A 1969-02-07 1970-01-29 Method and apparatus including a rotating intermediate storer for sz twisting of elements of a cable Expired - Lifetime US3643411A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1906997A DE1906997C3 (de) 1969-02-07 1969-02-07 Verfahren und Vorrichtung zum Verseilen von Verseilelementen für elektrische Kabel zu einer Verseileinheit mit abschnittsweise wechselnder Verdrillungsrichtung

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Publication Number Publication Date
US3643411A true US3643411A (en) 1972-02-22

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US6663A Expired - Lifetime US3643411A (en) 1969-02-07 1970-01-29 Method and apparatus including a rotating intermediate storer for sz twisting of elements of a cable

Country Status (8)

Country Link
US (1) US3643411A (enrdf_load_stackoverflow)
JP (1) JPS4827613B1 (enrdf_load_stackoverflow)
AT (1) AT292093B (enrdf_load_stackoverflow)
DE (1) DE1906997C3 (enrdf_load_stackoverflow)
FR (1) FR2033312B1 (enrdf_load_stackoverflow)
GB (1) GB1255372A (enrdf_load_stackoverflow)
NL (1) NL7001755A (enrdf_load_stackoverflow)
SE (1) SE352190B (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3786623A (en) * 1971-08-06 1974-01-22 Graenges Essem Ab Method and an apparatus for the continuous production of stranded wire
US3828538A (en) * 1971-12-13 1974-08-13 Yoshida Engineering Co Ltd High-speed double twist twisting apparatus mainly adapted to twist steel wires
US3851454A (en) * 1972-09-30 1974-12-03 Philips Corp Method of and device for the manufacturing of electrical conductors
US4006582A (en) * 1973-08-07 1977-02-08 Siemens Aktiengesellschaft Method and apparatus for reducing the electrical coupling in communicating cables
US4182107A (en) * 1978-11-06 1980-01-08 Western Electric Company, Inc. Method of forming S-Z twisted strand units
US4214430A (en) * 1978-01-31 1980-07-29 Siemens Aktiengesellschaft Method and apparatus for the layerwise SZ-stranding of elements to be stranded about a flexible core strand
US4214432A (en) * 1978-12-21 1980-07-29 Western Electric Company, Inc. Apparatus for forming S-Z twisted strand units
US4291527A (en) * 1980-08-15 1981-09-29 The Entwistle Company Cable strand tension controlling apparatus
US4317328A (en) * 1981-01-05 1982-03-02 The Entwistle Company Combination of strand neutralizer capstan and accumulator and closer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5073413A (enrdf_load_stackoverflow) * 1973-11-01 1975-06-17

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2869316A (en) * 1957-03-12 1959-01-20 Plastic Wire & Cable Corp Twisted conductors and cables and method and apparatus for making the same
US3169360A (en) * 1962-07-02 1965-02-16 Anaconda Wire & Cable Co Stranding apparatus and method
US3426519A (en) * 1967-02-11 1969-02-11 Kabel Metallwerke Ghh Apparatus for stranding fibers with reversing twist
US3455098A (en) * 1966-04-29 1969-07-15 Kabel Metallwerke Ghh Controllable drive means for accumulator stranding apparatus
US3481127A (en) * 1966-12-16 1969-12-02 Siemens Ag Apparatus for manufacturing lay-reversed communication cable

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1418261A (fr) * 1963-12-12 1965-11-19 Trefimetaux Perfectionnements à la fabrication des câbles téléphoniques
FR1470269A (fr) * 1966-03-01 1967-02-17 Fujikura Ltd Procédé et installation de fabrication de câbles de transmission
FR1524419A (fr) * 1967-04-07 1968-05-10 Sumitomo Electric Industries Procédé et dispositifs de fabrication de câbles de communication et nouveaux produits ainsi obtenus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2869316A (en) * 1957-03-12 1959-01-20 Plastic Wire & Cable Corp Twisted conductors and cables and method and apparatus for making the same
US3169360A (en) * 1962-07-02 1965-02-16 Anaconda Wire & Cable Co Stranding apparatus and method
US3455098A (en) * 1966-04-29 1969-07-15 Kabel Metallwerke Ghh Controllable drive means for accumulator stranding apparatus
US3481127A (en) * 1966-12-16 1969-12-02 Siemens Ag Apparatus for manufacturing lay-reversed communication cable
US3426519A (en) * 1967-02-11 1969-02-11 Kabel Metallwerke Ghh Apparatus for stranding fibers with reversing twist

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3786623A (en) * 1971-08-06 1974-01-22 Graenges Essem Ab Method and an apparatus for the continuous production of stranded wire
US3828538A (en) * 1971-12-13 1974-08-13 Yoshida Engineering Co Ltd High-speed double twist twisting apparatus mainly adapted to twist steel wires
US3851454A (en) * 1972-09-30 1974-12-03 Philips Corp Method of and device for the manufacturing of electrical conductors
US4006582A (en) * 1973-08-07 1977-02-08 Siemens Aktiengesellschaft Method and apparatus for reducing the electrical coupling in communicating cables
US4214430A (en) * 1978-01-31 1980-07-29 Siemens Aktiengesellschaft Method and apparatus for the layerwise SZ-stranding of elements to be stranded about a flexible core strand
US4182107A (en) * 1978-11-06 1980-01-08 Western Electric Company, Inc. Method of forming S-Z twisted strand units
US4214432A (en) * 1978-12-21 1980-07-29 Western Electric Company, Inc. Apparatus for forming S-Z twisted strand units
US4291527A (en) * 1980-08-15 1981-09-29 The Entwistle Company Cable strand tension controlling apparatus
US4317328A (en) * 1981-01-05 1982-03-02 The Entwistle Company Combination of strand neutralizer capstan and accumulator and closer

Also Published As

Publication number Publication date
FR2033312B1 (enrdf_load_stackoverflow) 1974-12-20
SE352190B (enrdf_load_stackoverflow) 1972-12-18
AT292093B (de) 1971-08-10
FR2033312A1 (enrdf_load_stackoverflow) 1970-12-04
DE1906997C3 (de) 1975-01-09
JPS4827613B1 (enrdf_load_stackoverflow) 1973-08-24
DE1906997A1 (de) 1970-08-20
NL7001755A (enrdf_load_stackoverflow) 1970-08-11
GB1255372A (en) 1971-12-01
DE1906997B2 (de) 1974-06-06

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