EP0147071B1 - Fabrication d'âmes de câble de télécommunications - Google Patents

Fabrication d'âmes de câble de télécommunications Download PDF

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Publication number
EP0147071B1
EP0147071B1 EP19840308216 EP84308216A EP0147071B1 EP 0147071 B1 EP0147071 B1 EP 0147071B1 EP 19840308216 EP19840308216 EP 19840308216 EP 84308216 A EP84308216 A EP 84308216A EP 0147071 B1 EP0147071 B1 EP 0147071B1
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EP
European Patent Office
Prior art keywords
core unit
twist
conductor
twisted
units
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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
Application number
EP19840308216
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German (de)
English (en)
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EP0147071A3 (en
EP0147071A2 (fr
Inventor
Philip Anthony Mcgettigan
Jean Marc Roberge
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Nortel Networks Ltd
Original Assignee
Northern Telecom Ltd
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Publication date
Application filed by Northern Telecom Ltd filed Critical Northern Telecom Ltd
Publication of EP0147071A2 publication Critical patent/EP0147071A2/fr
Publication of EP0147071A3 publication Critical patent/EP0147071A3/en
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Publication of EP0147071B1 publication Critical patent/EP0147071B1/fr
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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
    • H01B13/0228—Stranding-up by a twisting pay-off and take-up device

Definitions

  • This invention relates to the manufacture of telecommunications cable cores.
  • a telecommunications cable is constructed with a core having a multiplicity of twisted units of conductors, each unit conventionally being a twisted pair of conductors.
  • a core may be typically formed as a single core unit of twisted pairs, e.g. 50 or 100 pairs, or larger cores, e.g. up to 4,200 twisted pairs, each comprises a plurality of core units.
  • the twisted pairs are assembled together, e.g. by stranding, to form a core unit with the conductors of each pair twisted together with a predetermined lead to the twist, i.e. the distance taken along the pair for each conductor to complete a single revolution along its path. This distance will be referred to in this specification as the "twist lay" of a pair.
  • angle of twist lay The angle which each conductor makes with the longitudinal axis of its conductor unit as it extends along its twisted path will be referred to as the "angle of twist lay".
  • twist lays provided for the twisted pairs in a core unit with each pair having a particular lay and being adjacent to other pairs of different lays. Care is taken, so far as is practicable, to ensure that pairs of equal or substantially equal twist lays are separated from each other. The reason for this arrangement is to attempt to maximize the communications performance of the cable, i.e. to lessen pair-to-pair capacitance unbalance and to reduce crosstalk between pairs.
  • the conductors of each pair are twisted together in a completely separate operation from forming of twisted pairs into a core unit.
  • the conductors of each pair are twisted together in a high speed twisting machine in which the two conductors are held upon reels which are freely rotatable in a reel cradle.
  • the two conductors are fed from their reels, are brought together into a common path and are twisted into the pair by rotating a flyer.
  • the twisted pair is then wound onto another reel immediately after twisting. This reel is removed from the twisting machine and stored until required for forming into a core unit. At this stage, it is placed in supply stands for a core unit forming means with other reels of twisted pairs and the core unit is built.
  • a problem with this process is that a large inventory and storage for reels of twisted pairs of different conductor gauges, insulation colours and of twist lay are required for making core units which may be of different gauge, colour or arrangement of twist lays in the pairs from one unit to the next.
  • a cable core of 3,600 twisted pairs of pulp insulated conductor may require up to twenty-five different lengths of twist pitch for the manufacture of its core units.
  • the present invention provides a method and apparatus for the manufacture of a core unit in which the inventory and storage for reels of twisted pairs is avoided.
  • the method and apparatus of the invention allow for the manufacture of a cable core unit in which pair-to-pair capacitance unbalance and cross-talk between pairs is reduced and in which mutual capacitance between conductors in certain pairs is also reduced.
  • an apparatus for making a core unit for a telecommunications cable from twisted units of individually insulated conductors having a plurality of twisting machines each carrying a plurality of reels of insulated conductor and each comprising a flyer which is rotatable to introduce twist into the conductors to cause them to twist to form a twisted unit, means for rotating each of the flyers, and a core unit forming and take-up means in tandem with the twisting machines to draw the twisted units together and form a core unit, the forming and take-up means comprising drawing means to draw twisted units into the forming and take-up means characterized in that each of the flyers is rotatable by the rotating means at speeds which are variable independently of the rotational speeds of other flyers, and are variable during operation of the drawing means to draw twisted units into the forming and take-up means.
  • the twist lay angles of all the conductor units may be varied along the length of the core unit thereby preventing any conductor unit from having a short twist lay along its whole length so as to minimize mutual capacitance between conductors in the conductor unit.
  • the twist lay angles may differ between conductor units or may be changing in a different sense so as to minimize pair-to-pair capacitance unbalance and cross-talk between pairs.
  • the flyers may be arranged with their rotation speeds in groups.
  • the speed ratios of groups may be changed.
  • each flyer is independently drivable to enable it to have its rotational speed changed without affecting the speeds of any other flyer, whereby its speed ratio relative to any other flyer is changeable.
  • This may be made possible by providing a suitable individual and changeable speed drive to each flyer such as a mechanical drive having manually or automatically selectable gear ratios.
  • the angle and length of twist lay of any twisted pair is, of course, influenced by the relationship of the speed of rotation of its flyer and the feed speed of the conductors through the twisting machine, the latter governed by the line speed of the core unit being formed.
  • the ratio of speeds of rotation of the flyers may be changed after manufacture of a core unit thereby changing the relationship between the twist lays of the pairs, thus resulting in the succeeding core unit being of different design.
  • the present invention provides apparatus which produces a plurality of twisted pairs and then forms a core unit in tandem with the twisting operation, thereby avoiding the use of two distinct and separate process steps for these operations and the consequent need for an inventory and storage of reels of twisted conductor pairs of different twist lay and colours.
  • the apparatus has a universal application for core unit manufacture in that it is capable of producing many distinct and different twist lays from each twisting machine to provide the capability for a change in design of core unit.
  • means is provided to measure the line speed of the core unit being made and a signal sent from the measuring means influences the rotating means for the flyers to vary flyer rotation according to any variation in core unit line speed.
  • the flyer is preferably changeable on a continuously changing or cycling basis between upper and lower limits for angles of twist lays, e.g. angles which correspond to twist lays between 2.7 inches and 5.1 inches. While it is possible to provide a complete cycle of change in angle of twist lay between upper and lower limits over different lengths of the core unit for different twisted pairs, this would provide crossover points of the cycles thus producing equal angles of twist lays for different pairs at specific locations along the core unit. As the occurrence of such phenomenon should be minimized as much as possible, it is preferable that all of the cycles are of the same length and are out of phase with one another.
  • the invention also includes a method of making a core unit of twisted insulated conductor units in which insulated conductors are twisted together in twisting stations into a plurality of twisted insulated conductor units with each conductor unit having a single direction of twist along its length, the twisted conductor units being moved upstream from the twisting stations and into a core unit forming and take up means to draw the twisted units together to form the core unit characterized in changing the angles of twist lay of some of the conductor units as the units are being formed while providing for each conductor unit, at any cross-section through the core unit, an angle of twist lay which either differs from that of another conductor unit or is changing in a different sense from that of another conductor unit.
  • the angles of twist lay of all of the conductor units are changed continuously in cycles which have substantially equal lengths, amplitudes and cycle shapes.
  • the average twist lay of each unit is substantially equal to that of each other unit, thereby reducing to substantially zero, the variation in mutual capacitance due to each conductor unit having different twist lays.
  • angles of twist lays of all the conductor units may be changed continuously, it is possible to leave the lay angle of one or more of the twisted conductor units unchanged in a case where the twist lays of these certain units are outside the limits of the changing lays.
  • the invention includes a core unit for a telecommunications cable comprising a plurality of insulated conductors formed into twisted conductor units with each conductor unit having a single direction of twist along its length characterized in that the angles of twist lay of some at least of the conductor units change along the length of the core unit and, at any cross-section are either different from twist lay angles of other conductor units or are changing in a different sense from twist lay angles of other conductor units.
  • the twist lay angles change continuously and in a practical arrangement, the angles change in a cycling manner between upper and lower limits and preferably with all lay angles either being different or changing in a different sense from another conductor unit which has the same twist lay at any cross-section of the core units.
  • apparatus for making a stranded, core unit of one hundred twisted pairs of conductors comprises apparatus for twisting the conductor pairs, including a hundred twisting machines 10 arranged in four straight banks 12 of machines with twenty-five machines in each bank.
  • the apparatus is capable of making cable core unit at speeds of up to and possibly in excess of 600 ft. per minute.
  • a core unit forming and take-up means comprising a stranding machine 14, which is of conventional construction.
  • the forming and take-up means also comprises, in normal fashion, a closing head 16 for drawing twisted conductor units together and a binder 18.
  • the stranding machine comprises a stranding flyer 17 having a "helper" capstan 19 to assist in drawing the conductor pairs through the head 16 and binder 18 in forming the core unit 23.
  • the main drawing means comprises a take-up reel 21 with its drive motor 20. The construction of the forming and take-up means is conventional and will be described no further.
  • Each of the twisting machines 10 comprises a cabinet 22, ( Figure 3), the cabinets together forming the rectangular shape of the banks 12 in Figures 1 and 2. Within each cabinet there is located a reel cradle 24 for holding in rotatable fashion, two reels 26 of individually insulated conductors, as shown by Figure 5, to enable the conductors to be drawn from the reels under the drawing influence of the stranding machine 14.
  • Each twisting machine may be of conventional construction for enabling the conductors to be drawn from the reels and to be twisted together as they pass through and outwardly from the machine. However, in this embodiment, each twisting machine comprises two flyers 28 and associated pulleys to provide a balanced rotational structure while avoiding conventional balance weights.
  • the two conductors 30 being removed from the reels 26 pass downwardly together as described in the aforementioned specification and then through the flyer, the flyers are rotated to provide the conductors with twist, by a drive motor 31 which is an individual AC motor mounted on top of a frame structure 32 and drivably connected to the flyers by means of a pulley 34 and pulley wheels 36.
  • a drive motor 31 which is an individual AC motor mounted on top of a frame structure 32 and drivably connected to the flyers by means of a pulley 34 and pulley wheels 36.
  • Each of the AC electric motors is a variable speed drive motor and provides a means for changing the rotational speed of the flyer, according to a feature of this invention as will be described.
  • each of the twisted pairs 38 moves along the line of its associated bank 12 of twisting machines and proceeds towards the stranding machine 14.
  • the apparatus also includes a tension equalizing means and a tension reducing means as described in a copending Canadian Patent Application Serial No. 444,295, filed December 23, 1983, and entitled "Forming Cable Core Units" in the names of J. Bouffard, A. Dumoulin and M. Seguin.
  • the tension equalizing means comprises a plurality of such means 40, one above the downstream end of each twisting machine 10. This is clearly seen from Figures 2 and 3, while the equalizing means is omitted from Figures 1 and 5 for clarity.
  • each tension equalizing means comprises a shaft 42 extending from side to side of the feed paths for the twisted pairs, the shaft being rotatable at its ends.
  • One end of the shaft enters an upstanding housing 44 and has a pulley 46 engaged by a drive belt 48.
  • This drive belt drives a group of five of the shafts 42, each of which has a pulley 46.
  • One of the drive shafts for each group of five is driven by a drive motor 50 through a drive member 52.
  • a tubular member 54 is carried in bearings around each shaft 42, so that it is in slipping, drivable engagement with the shaft in that it rotates at substantially the same angular speed as its shaft unless it is restrained. While the bearings carrying the tubular member may suffice for this purpose, the inside of the member may also be packed with grease to hold it in more positive driving engagement with the shaft.
  • Each member 54 extends beneath the feedpaths for the twisted pairs of conductors.
  • Each drive motor 50 is coupled electrically to a means (not shown) which registers the speed of the core unit through the core unit forming and take-up means.
  • This registering means which is conveniently a rotor pulser is of conventional construction and will be described no further.
  • the speed of the drive motor 50 is such as to provide a peripheral speed for the unrestrained tubular members 54, which is slightly in excess of the draw speed of the twisted pairs into the stranding machine.
  • the peripheral speed of the unrestrained tubular members is a question of choice dependent upon the tension reducing effects that are required. It has been found in practice that the peripheral speed of the tubular members 54 may exceed the speed of the twisted units into the stranding machine by up to five percent and preferably between two and three percent.
  • each bank 12 of twisting machines there are twenty-five tension equalizing means along each bank 12 of twisting machines.
  • the furthest equalizing means from the stranding machine supports only one twisted pair 38, i.e. that pair from the furthest twisting machine.
  • the number of twisted pairs supported by equalizing means increases along each bank 12, from equalizing means to equalizing means, until 25 pairs are carried by the equalizing means closest to the stranding machine.
  • Guide means in the form of guide rods 56 is provided for holding the twisted pairs 38 spaced from one another as they extend across the banks 12 of machines and thus prevents the tension in one pair from influencing that in another.
  • these guide rods 56 are located adjacent to but slightly downstream from each of the tubular members 54 and are held stationary in support brackets (not shown) in spaced apart positions axially of the tubular members.
  • the tension reducing means comprises for each bank 12 of twisting machines, two driven rotatable cylinders 58 and 60, around each of which the conductors must pass on the way to the stranding machine.
  • the two cylinders 58 and 60 are of substantially equal diameter and have a common drive (not shown).
  • a drive motor for the cylinders is electrically influenced by the line speed of the core unit within the forming and take-up means to provide a peripheral speed of each of the cylinders 58 and 60, slightly in excess of the drawing speed of the twisted pairs of conductors into the stranding machine.
  • the degree of this excess in speed is again subject to choice dependent upon design, but in this particular machine is up to five percent and is preferably in the region of three percent.
  • the two cylinders 58 and 60 are not operated to draw the twisted pairs along their feedpaths at the peripheral speed of the cylinders.
  • the cylinders 58 and 60 do not engage each of the twisted pairs along a sufficiently long arc of contact to provide enough frictional grip to draw the pairs from the twisting machines without the assistance of tension upon the pairs downstream of the cylinders and provided by the rotation of the reel 18.
  • This downstream tension provided by motor 16 actually draws the pairs from the twisting machines. In doing so, it pulls the twisted pairs onto the cylinder surfaces to increase frictional contact to enable the cylinders to drive the pairs under friction at a speed substantially that of the draw speed of reel 18.
  • the cylinders 58 and 60 would be incapable of drawing twisted pairs from the twisting machines. While this downstream tension is maintained the cylinders will provide a drive to the twisted pairs with some slippage because of the excess peripheral speed of the cylinders.
  • tension in each of the conductors created by the pull of the motor 20 is at least partly governed by resistance to rotation of each reel 26 and flyer and the resistance offered by each guiding pulley or other surface with which a pair comes into contact. If these tension differences were still present when the twisted pairs reached the forming and take-up means, they would create differing tension conditions in the core unit which would lead to variations in the electrical characteristics. Also, the finished core unit would be contorted along its length, which would render it difficult or impossible to further process the cable.
  • the tension equalizing means overcomes this problem and the tension reducing means reduces the tensions in the pairs to enable the stranding machine to operate with no overdue strain to draw the total of a hundred twisted pairs for the stranding operation.
  • the tubular members 54 As the twisted pairs pass across and are supported by the tubular members 54, they travel at different speeds dependent upon their positions and path lengths in the cable core unit 23 being formed by the forming and take-up means. There is a tendency for the tubular members to urge the twisted pairs in the forward direction because of the faster driven peripheral speed of the members. However, with regard to each tubular member 54, because of the slipping, driving engagement between the tubular members and their shafts 42, the upstream tensions in the twisted pairs and the effect of their relative speeds combine to slow down the speed of rotation of the tubular member to a speed which is influenced by these tensions and relative speeds of the pairs.
  • each bank 12 the pairs of conductors with their relative tensions substantially closer than at upstream positions, approach and go through their tension reducing means.
  • the pull by the stranding machine increases the frictional contact of the twisted pairs against the surfaces of the cylinders.
  • these cylinders are rotating at a peripheral speed which is greater than the throughput speed of the twisted pairs into the stranding machine, their degree of grip upon the pairs is insufficient to draw the pairs from the twisting machines at the peripheral speeds of the cylinders because of the small arc of contact between the cylinders and the twisted pairs as discussed above.
  • the degree of drive by the cylinders is dependent upon the frictional grip upon them by the pairs which increases and decreases in proportion to the downstream tension created by the draw of the stranding machine.
  • the drive by the cylinders upon each pair is purely frictional and serves to reduce tension in the twisted pairs. Any slight increase in the tension downstream from the cylinders will improve their frictional engagement with the pair, thereby reducing the tension again. It follows that the tension in any twisted pair upstream of the cylinders (e.g. up to 3 lbs.) is reduced on the downstream side to an acceptable level (e.g. about 1.0 lbs.) for drawing into the stranding machine. It is stressed that the driving force applied to each twisted pair is dependent upon the downstream tension in that pair.
  • the cylinders 58 and 60 drive each twisted pair at any moment at its own individual speed irrespective of the speed of any of the other pairs.
  • the speeds on the pairs must, of course, differ from one another because of the different path lengths they will occupy in the core unit. The operation of cylinders 58 and 60 thus conveniently allows for this.
  • each of the drive motors 31 is independently drivable at a speed such as to provide a particular twist lay to the pair of conductors being formed by the associated machine 10.
  • This twist lay may be completely independent of twist lays of other pairs and may be changed either during the twisting of the pairs and forming of a core unit or after formation of one core unit and before start-up of a subsequent pair twisting and core unit forming operation.
  • FIG. 6 shows a control means for controlling the rotational speeds of the flyers.
  • This control means comprises a hundred microprocessors 66, i.e. one microprocessor for each motor 31.
  • a computer 68 is connected by an address bus 70 to each of the microprocessors.
  • the conventional means provided for measuring the actual line speed of a core unit as it is being drawn into the stranding machine is connected to each of the microprocessors by lines 71 to send frequency signals on a continuous basis, these signals corresponding to the actual core unit line speed.
  • the computer contains instructions for issuing to each of the microprocessors for controlling its associated AC motor 31 to drive the flyers of its twisting machine at the appropriate speed and provide the required twist lay to the pair of conductors being twisted upon that machine. These instructions correspond to a particular or actual line speed of the core unit being made.
  • the computer addresses the microprocessors on the address bus 70 and sends the instructions to each microprocessor in the form of a digital signal which corresponds to the required twist lay produced by that particular twisting machine. This signal is stored in a memory means of the microprocessor until it is replaced by a new digital signal sent on the address bus. A signal is then sent by each microprocessor along line 72 to an AC inverter drive 74.
  • This signal is an AC signal having a frequency corresponding to the digital signal sent on the address bus, but influenced by the frequency signal for the line speed received on line 71 so that it is modified to control the appropriate motor 31 to produce the twist lay required for the actual line speed of the core unit.
  • the AC inverter drive 74 converts the incoming signal to DC current and scrambles it to reconvert it into an AC output signal of the required frequency to drive the AC motor 31 at the desired speed.
  • the inverter drive has the effect of reducing the frequency from that received by it from the microprocessor and this frequency is one which is suitable for sending to the motor 31.
  • a signal may be sent from the computer to each microprocessor for start-up of a core unit forming operation, and then the angles of twist lays produced by each of the twisting machines is as desired and controlled by the rotational speeds of each AC drive motor 31.
  • fresh instructions may be fed into the computer to send signals to the microprocessors upon a subsequent operation to form a core unit with twisted pairs having different twist lay angles from the core unit which was formed previously.
  • the control means enables the apparatus together with the individual AC drive motors, to avoid the conventional necessity of having a storage and inventory of reeled twisted pairs of conductors of different gauges, colours and lay angles.
  • core units of different design, different lay angles, different conductor gauges, different colour and different types of insulation may be produced merely by changing the reels 26 for fresh reels in the twisting machines and by providing different instructions to the computer 68 for controlling the microprocessors.
  • one or all of the twisted pairs may have twist lay angles which vary and these angles preferably vary on a continuous cyclical basis between upper and lower twist angle limits.
  • this apparatus makes it possible to provide varying twist lay angles which at any particular position along the core unit either differ one from each of the others or two of the angles may be the same as one another over an insignificantly short distance at cyclic crossover points with the angles changing in opposite sense from one another.
  • This can be effectively provided by issuing suitable instructions through the computer 68 to cause the flyers 28 to rotate at varying speeds to produce twist lay angles, which while lying between the same upper and lower limits, do in fact, cycle between these limits in out-of-phase relationship with each other.
  • twelve out-of-phase cycling twist lay angles are provided. Eight of the phases may each be applied to eight pairs of conductors and the remaining four phases may each be applied to nine pairs of conductors.
  • each cycle has the twist lay angles cycling between an angle which is represented by upper limit of twist lay of 4.9 inches and one which is represented by a lower limit of 2.7 inches.
  • a complete cycle for each twisted pair occurs over a distance of approximately 100 meters of the finished core unit.
  • the cycles of twist lay angle of the pairs have substantially equal lengths, amplitudes and other cyclic characteristics to produce average twist lays in the units which are substantially equal thereby minimizing differences in the mutual capacitance from one pair to another and which is influenced by the twist lay.
  • each cycling phase of twist lay angles produces an angle equal to that of another phase where one twist lay angle is increasing on its cycle, while the other is decreasing.
  • this cycle has the same twist lay and lay angle value at points 78 and 80 as cycles 82 and 84 respectively for different conductor pairs.
  • twist lay angles of the pairs are equal at these crossover points on the chart, then these points represent extremely short distances along the core unit which can have only an extremely minor effect upon the electrical characteristics of the finished cable.
  • the method of producing the varying lay angles ensures that the motors 31 drive in such a way as to produce movement along the cycle between the cycle limits in one direction along a shorter length of core unit than in the other direction.
  • Figure 8 is a graph representing a possible twenty-five out-of-phase cycles of lay angles. As shown in Figure 8, the varying twist lay angles are represented by upper and lower limits of twist lay of 2.7 and 5.1 inches and each cycle occurs over approximately 100 meters.
  • Figures 7 and 8 show cycles of twist lay angles with substantially equal lengths and amplitudes.
  • substantially equal average twist lays in the conductor pairs may be produced by having varying cycle lengths and amplitudes in the cycles of twist lay angle in each pair, but, of course, this would be more difficult to accomplish.
  • the average twist lay of each conductor unit is substantially equal to that of every other unit thereby substantially entirely avoiding differences in mutual capacitance and mutual inductance between the conductor units which is influenced by the twist lay.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Processes Specially Adapted For Manufacturing Cables (AREA)
  • Ropes Or Cables (AREA)
  • Communication Cables (AREA)

Claims (27)

1. Dispositif pour la fabrication d'une unité d'âme pour un câble de télécommunications à partir d'unités torsadées de conducteurs isolés individuellement, ayant une multitude de machines de torsadage (10) comportant chacune une multitude de rouleaux (26) de conducteur isolé (30) et chacune comportant une aile de retordage (28) qui peut tourner de manière à introduire une torsion dans les conducteurs pour les amener à se tordre et former une unité torsadée (38), des moyens (31, 35, 36) pour faire tourner chaque aile de retordage, et des moyens de formation d'unité d'âme et de bobinage (14, 16,18) en tandem avec les machines de torsadage pour rassembler les unités torsadées et former une unité d'âme (23), le moyen de formation et de bobinage comprenant un moyen de traction (19, 20, 21 ) pour entraîner les unités torsadées dans le moyen de formation et de bobinage, caractérisé en ce que chaque aile de retordage peut être mise en rotation par le moyen tournant à des vitesses qui sont variables indépendamment des vitesses de rotation des autres ailes de retordage, et sont variables pendant le fonctionnement du moyen de traction pour entraîner les unités torsadées dans le moyen de formation et de bobinage.
2. Dispositif selon la revendication 1, caractérisé en ce qu'au moins certaines machines de torsadage comprennent chacune un moteur d'entraînement à courant alternatif (31) pour mettre en rotation l'aile de retordage de la machine indépendamment des ailes de retordage des autres machines.
3. Dispositif selon la revendication 2, caractérisé en ce qu'il comporte un moyen de commande (66, 68, 70) pour commander la vitesse de chaque moteur, le moyen de commande pouvant produire un signal correspondant à l'angle désiré du battant de torsadage d'une unité torsadée devant être formée par une machine de torsadage pour amener son moteur à courant alternatif à faire tourner l'aile de retordage respective à une vitesse appropriée à la vitesse de la chaîne du dispositif et produire l'angle désiré du battant de torsadage.
4. Dispositif selon la revendication 3, caractérisé en ce que le moyen de commande comprend un ordinateur (68), un microprocesseur (66) pour chaque mote'or à courant alternatif (31), l'ordinateur étant connecté à chaque microprocesseur pour lui envoyer un premier signal qui correspond à l'angle désiré du battant de torsadage, à une vitesse donnée de la chaîne du dispositif, le microprocesseur étant capable d'émettre un signal de commande de base correspondant au premier signal stocké et modifié par le second signal pour commander la vitesse d'entraînement du moteur à courant alternatif associé et fournir l'angle désiré du battant de torsadage à la vitesse réelle de la chaîne.
5. Dispositif selon la revendication 4, caractérisé en ce qu'une commande (74) à courant alternatif par onduleur est disposée entre chaque microprocesseur (66) et son moteur à courant alternatif associé (31), et la commande par onduleur est capable de convertir le signal de commande de base en signal de commande final, qui est un signal de commande à fréquence à courant alternatif et qui est reçu par le moteur d'entraînement à courant alternatif pour commander sa vitesse d'entraînement.
6. Dispositif selon la revendication 4, caractérisé en ce que le premier signal envoyé à au moins un microprocesseur peut être changé pendant le fonctionnement de son moteur à courant alternatif de manière à faire tourner l'aile de retordage et pendant le câblage d'une unité d'âme.
7. Dispositif selon la revendication 4, caractérisé en ce que le premier signal envoyé à chaque microprocesseur peut être changé.
8. Dispositif selon la revendication 4, caractérisé en ce que le premier signal appliqué à chaque microprocesseur peut être modifié et, à tout instant particulier, est tel que cela se traduit par le fait que le moteur à courant alternatif associé au microprocesseur est entraîné à une vitesse permettant de faire tourner son aile de retordage à une vitesse de rotation différente de celle de toutes les autres ailes.
9. Dispositif selon la revendication 8, caractérisé en ce que chaque premier signal peut être modifié d'une façon cyclique pour provoquer la rotation de son aile de retordage afin de produire l'angle du battant de torsadage de l'unité torsadée associée pour l'augmenter ou le diminuer continuellement entre des limites supérieure et inférieure.
10. Dispositif selon la revendication 9, caractérisé en ce que la valeur du premier signal change dans un sens lors de son cycle à un taux différent de celui de l'autre sens.
11. Dispositif selon la revendication 8, caractérisé en ce que les premiers signaux appliqués aux microprocesseurs peuvent être changés dans des cycles qui ont la même durée et qui sont tous déphasés les uns par rapport aux autres.
12. Procédé pour fabriquer une unité d'âme (23) d'unités (38) de conducteurs isolés torsadés où les conducteurs isolés (30) sont torsadés ensemble dans des postes de torsadage pour donner une multitude d'unités de conducteurs isolés torsadés avec chaque unité de conducteurs ayant un seul sens de torsion suivant sa longueur, les unités de conducteurs torsadés étant déplacées en amont des postes de torsadage et entrant dans un moyen (14, 16, 18) de formation d'unités d'âme et de bobinage pour rassembler les unités torsadées et former une unité d'âme, caractérisé en ce que les angles du battant de torsion de certaines des unités de conducteurs sont changés alors que les unités sont formées tout en fournissant pour chaque unité de conducteurs, au droit de toute section transversale de l'unité d'âme, un angle du battant de torsion qui est soit différent de celui d'une autre unité de conducteurs soit changé dans un sens différent de celui de l'autre unité de conducteurs.
13. Procédé selon la revendication 12, caractérisé en ce qu'il comprend le changement continuel des angles du battant de torsion de toutes les unités de conducteurs alors que celles-ci sont formées pour fournir, dans l'unité d'âme, un battant de torsion moyen dans chaque unité qui est sensiblement égal à celui de chaque autre unité sur des longueurs spécifiques de l'unité d'âme.
14. Procédé selon la revendication 13, caractérisé en ce qu'il comprend le changement des angles du battant de torsion de manière cyclique, les cycles (17, 82, 84) ayant sensiblement les mêmes caractéristique, amplitude et longueur.
15. Procédé selon la revendication 12, caractérisé en ce qu'il comprend le changement simultané des angles du battant de torsion de toutes les unités de conducteurs, alors que celles-ci sont en cours de formation.
16. Procédé selon la revendication 12, caractérisé en ce que les angles des battants de torsion sont changés continuellement.
17. Procédé selon la revendication 16, caractérisé en ce qu'il comprend le changement des angles du battant de torsion de manière cyclique, les cycles (76, 82, 84) formés à tout instant particulier ayant des longueurs sensiblement égales et étant déphasés les uns par rapport aux autres.
18. Procédé selon la revendication 12, caractérisé en ce qu'il comprend le changement de tous les angles du battant de torsion de manière continue et cyclique, tous les cycles (76, 82, 84) étant de longueur sensiblement égale et déphasés les uns par rapport aux autres.
19. Procédé selon la revendication 12, caractérisé en ce qu'il comprend la formation des angles du battant de torsion par passage des conducteurs isolés dans les ailes de retordage (28) à chaque poste de torsadage, avec chaque aile animée d'un mouvement de rotation par un moteur d'entraînement individuel à courant alternatif (31), et chaque angle de battant de torsion changé en faisant varier la vitesse d'entraînement du moteur d'entraînement à courant alternatif.
20. Procédé selon la revendication 17, caractérisé en ce qu'il comprend la fourniture aux angles du battant de torsion de trajets cycliques (76, 82, 84) sensiblement identiques de changement et, pour chaque trajet du cycle l'angle du battant de torsion augmente à un taux différent de sa diminution.
21. Unité d'âme pour câble de télécommunications, comprenant une multitude de conducteurs isolés (30) formés en unités (38) de conducteurs torsadés, chaque unité de conducteurs ayant un seul sens de torsion suivant sa longueur, caractérisée en ce que les angles du battant de torsion d'au moins certaines unités de conducteurs changent suivant la longueur de l'unité d'âme (23), et à toute section transversale, sont différents des angles du battant de torsion des autres unités de conducteurs ou sont changés dans un sens différent par rapport aux angles du battant de torsion des autres unités de conducteurs.
22. Unité d'âme selon la revendication 21, caractérisée en ce que les angles du battant de torsion de toutes les unités de conducteurs changent suivant la longueurde l'unité d'âme.
23. Unité d'âme selon la revendication 22, caractérisée en ce que les angles du battant de torsion changent continuellement et de façon cyclique.
24. Unité d'âme selon la revendication 23, caractérisée en ce qu'à toute section transversale particulière de l'unité d'âme, les cycles (76,82,84) ont des longueurs sensiblement égales et sont déphasés les uns par rapport aux autres.
25. Unité d'âme selon la revendication 21, caractérisée en ce que les angles du battant de torsion changent suivant la longueur de l'unité d'âme pour fournir un battant de torsion moyen pour chaque unité de conducteurs qui est sensiblement égal à celui de chaque autre unité de conducteurs suivant des longueurs spécifiques de l'unité d'âme.
26. Unité d'âme selon la revendication 25, caractérisée en ce que l'angle du battant de torsion dans chaque unité de conducteurs change continuellement et change suivant des cycles, les cycles (76, 82, 84) des différentes unités de conducteurs ayant les mêmes caractéristique, amplitude et longueur et étant déphasés les uns par rapport aux autres à toute section transversale particulière de l'unité d'âme.
27. Unité d'âme selon la revendication 25, caractérisée en ce que les paires de conducteurs sont câblées ensemble.
EP19840308216 1983-12-23 1984-11-27 Fabrication d'âmes de câble de télécommunications Expired EP0147071B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA444289 1983-12-23
CA000444289A CA1213951A (fr) 1983-12-23 1983-12-23 Fabrication d'ames pour cables de telecommunications

Publications (3)

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EP0147071A2 EP0147071A2 (fr) 1985-07-03
EP0147071A3 EP0147071A3 (en) 1987-01-07
EP0147071B1 true EP0147071B1 (fr) 1991-01-23

Family

ID=4126825

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EP19840308216 Expired EP0147071B1 (fr) 1983-12-23 1984-11-27 Fabrication d'âmes de câble de télécommunications

Country Status (6)

Country Link
EP (1) EP0147071B1 (fr)
JP (1) JPS617512A (fr)
CA (1) CA1213951A (fr)
DE (1) DE3484013D1 (fr)
ES (2) ES8606725A1 (fr)
FI (1) FI80162C (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3715877A (en) * 1969-10-27 1973-02-13 Oki Electric Cable Communication cable
GB1303106A (fr) * 1970-01-23 1973-01-17
GB1428130A (en) * 1972-10-04 1976-03-17 Cortinovis Spa Apparatus for the manufacture of telephone cables
JPS5136821A (en) * 1974-09-25 1976-03-27 Hitachi Electronics Satsuzokan no kodeninkyokukeiseihoho

Also Published As

Publication number Publication date
ES8706285A1 (es) 1987-05-16
ES8606725A1 (es) 1986-04-16
EP0147071A3 (en) 1987-01-07
ES549980A0 (es) 1987-05-16
ES538953A0 (es) 1986-04-16
JPS617512A (ja) 1986-01-14
FI845025L (fi) 1985-06-24
JPH0381250B2 (fr) 1991-12-27
FI845025A0 (fi) 1984-12-19
DE3484013D1 (de) 1991-02-28
EP0147071A2 (fr) 1985-07-03
FI80162C (fi) 1990-04-10
FI80162B (fi) 1989-12-29
CA1213951A (fr) 1986-11-12

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