US3762150A - High speed stranded conductor production process - Google Patents

High speed stranded conductor production process Download PDF

Info

Publication number
US3762150A
US3762150A US00138688A US3762150DA US3762150A US 3762150 A US3762150 A US 3762150A US 00138688 A US00138688 A US 00138688A US 3762150D A US3762150D A US 3762150DA US 3762150 A US3762150 A US 3762150A
Authority
US
United States
Prior art keywords
reel
guide member
set forth
strands
cable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00138688A
Other languages
English (en)
Inventor
H Akachi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oki Electric Cable Co Ltd
Original Assignee
Oki Electric Cable Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Oki Electric Cable Co Ltd filed Critical Oki Electric Cable Co Ltd
Application granted granted Critical
Publication of US3762150A publication Critical patent/US3762150A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • D07B3/085—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 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

Definitions

  • This invention relates to a high speed stranded conductor production process and more particularly, to an application of the construction of a variable pitch stranded conductor for communication cables and the process for producing the conductor which makes it possible to employ a relatively large capacity reel thereby to produce a high rotational movement for strands as they are twisted together into a stranded conductor and is also applicable to the production of cores for communication cables having large diameters from strands in multipairs by twisting the strands together as they are being wound about the reel.
  • variable pitch stranded conductors for communication cables and the process and apparatus for producing such stranded conductors have been found excellent and more advantageous over the prior arts, but the applicant has further developed an improved variable pitch stranded conductor production apparatus which is of the type in which strands are twisted together as they are being payed out of the reed drum (this type of apparatus will be referred to as paying-out type" hereinafter) and details of such an apparatus are disclosed in co-pending Patent Application Ser. No. 78870, filed on Oct. 7, 1970, now U.S. Pat. No. 3,715,877.
  • the apparatus can produce variable pitch stranded conductors with a high efficiency through efficient utilization of the principle of the process for producing variable pitch stranded conductors.
  • the size of the rotary frame or flyer can not be reduced to the extent that when small gage strands are twisted together at a high speed the inertia force of the rotary frame or flyer may be disregarded at the time of actuation, acceleration, deceleration, sudden stoppage or the like.
  • an additional grooved guide pulley or pulleys must be provided and the additional guide pulley or pulleys also must have a large diameter sufficient to prevent the stranded conductor from being untwisted into the individual strands.
  • One object of the present invention is to provide a highly efficient stranded conductor production process which can effectively eliminate the above-mentioned problems inherent in the prior art process using a take-up type twisting apparatus.
  • Another object of the present invention is to provide a stranded conductor production process which can be also effectively carried out using a paying-out type" twisting apparatus.
  • a further object of the present invention is to provide a process which can be also utilized in the production of a constant pitch conductor.
  • FIG. 1 is a side elevational view of an apparatus suitably employed in carrying out the process according to the present invention
  • FIG. 2 is a cross-sectional view taken substantially along the line AA' in FIG. I; 7
  • FIG. 3 a diagrammatic view showing the operation of said apparatus of FIGS. 1 and 2;
  • FIG. 4 is a diagrammatic view showing the operation of a modified form of apparatus suitably employed in carrying out the process of the invention.
  • FIG. 5 is a diagrammatic view showing the operation of a still further modified form of apparatus suitably employed in carrying out the process of the invention.
  • FIG. 1 shows a take-up type" apparatus employed in producing a stranded conductor by the process of the invention
  • FIG. 2 is a front elevational view of the apparatus taken substantially along the line A-A' of FIG. 1
  • FIG. 3 is a diagrammatic view showing the operation on the apparatus of FIGS. 1 and 2
  • FIG. 4 is similar to FIG. 3, but shows the apparatus with the capstan shown in FIG. 3 removed therefrom
  • FIG. 5 is a diagrammatic view of an apparatus employed for preparing a constant pitch stranded conductor by the process of the invention.
  • FlGS. 3 through are on the same reduced scale.
  • FIGS. 1 through 3 denotes strands or cable core elements from which a stranded conductor or communication cable core is formed and in case of a communication cable core, the strands are arranged in pairs or quads.
  • Each of the apparatus of FIGS. 1 through 3 and 5 comprises a capstan 6 which is adapted to feed the strands 1 to reel 18 or unwind the strands from the reel at a predetermined constant rate in either case.
  • the capstan 6 is connected through a transmission mechanism 41, 42 and 43 (shown only in FIGS. 3 and 5) to a main drive shaft 12 rotated at a constant speed from an electric motor 46 through V-sheaves 44, 45.
  • Reference numeral 7 denotes a guide plate which has guide holes formed therein in an arrangement depending upon a particular twisting pattern for the strands and after having passed through the guide holes in the guide plate 7, the strands 1 are fed into a rotary twisting member 8 which twists the strands together as they pass through its hole.
  • the rotary twisting member 8 is rotated from the main drive shaft 12 through V- sheaves 10, 11 and an endless member trained over the V-sheaves.
  • the rotation speed of the twisting member 8 is higher than that at which the strands 1 are actually twisted together so that wear may be evenly distributed around the entire circumference of the hole in the member 8.
  • the hole in the twisting member 8 flares adjacent to the reel so that the twisted strands 1 may not separate from each other as they leave the twisting member 8.
  • the strands issue from the twisting member 8 as a semi-stranded conductor or cable unit which will be subjected to further twisting to form a core for a communication cable, for example.
  • Reference numeral 19 denotes a ring-shaped rotary member having the inner diameter larger than the outer diameter of the flanges of the reel 18 and the rotary member 19 is maintained in the concentric relationship to the reel 18 by means of four support rolls 24, 25, 26 and 27 mounted in equiangularly spaced relationship around a pedestal 30.
  • the rotary member 19 supports grooved guide pulleys 20, 21, 22 and 23 at angularly spaced points around the rotary member which serve to feed the twisted strands 1 to and onto the drum of the reel 18.
  • the pulleys have a large diameter sufficient to prevent untwisting the twisted strands and the pulleys are formed from plastics so that any undue centrifugal force may not be generated.
  • one guide pulley is employed or two guide pulleys may be used in order to keep balance.
  • the ring-shaped rotary member 19 is then rotated by a torque motor 35 through V-sheaves 28, 29 and an endless member (shown with the dotted line) trained over the sheaves at a speed higher than that at which the reel 18 rotates or there is imparted thereto a reverse direction torque.
  • a torque motor 35 through V-sheaves 28, 29 and an endless member (shown with the dotted line) trained over the sheaves at a speed higher than that at which the reel 18 rotates or there is imparted thereto a reverse direction torque.
  • the reel 18 rotates in the counterclockwise direction while the torque mtoro 35 rotates the rotary member 19 in the clockwise direction.
  • the reel 18 is fixedly secured at the opposite ends to the hollow shaft 16 by mean of an arm 31 and a set screw 17 for rotation together with the shaft 16.
  • the shaft 16 is cantilevered at one end by a pedestal 32 which is in turn supported on the machine base and rotated by the main drive shaft 12 through V-sheaves 36, 37 and endless members trained over the sheaves (shown with the dotted lines).
  • the rotation speed of the reel shaft 16 is maintained in a predetermined ratio to the paying-out speed of the strands 1 by the capstan 6 so as to provide a basic pitch for a variable pitch stranded conductor to be formed from the strands.
  • Reference numeral 13 denotes a detachable flyer. which is fixedly secured by a nut 14 to a flyer shaft 15 which is in turn rotatably supported within the reel shaft 16 and also cantilevered at one end by the pedestal 32.
  • the flyer shaft 15 is rotated by the main drive shaft 12 through V-sheaves 38, 39 and an endless member trained over the sheaves (shown with the dotted line).
  • the rotation of the ring-shaped rotary member 19 is in the same direction as the reel 18 and the rotation speed of the member 19 is delayed relative to that of the reel by a time period necessary for a turn of the stranded conductor to be placed about the entire diameter of the drum of the reel.
  • the rotation of the flyer 13 is also in the same direction as that of the reel 18, but the rotation speed of the flyer is lower than that of the ring-shaped rotary member 19.
  • a traverse shaft 33 is connected at one end to a reversible motor 34 and at the other end to a pedestal 30 supporting the rotary member 19 so as to reciprocally traverse the pedestal by a distance determined by the axial length between the flanges of the drum of the reel 18 thereby to uniformly distribute the stranded conductor along the drum of the reel 18.
  • the flyer 13 has a ring-shaped outer peripheral rim having an inner diameter larger than the outer diameter of the flange at the leading end of the reel 18 and surrounding the reel flange and accordingly, the stranded conductor 2 can be effectively prevented from contacting the reel flange.
  • Reference numeral 40 denotes a common bed on which the capstan 16 and pedestals 9, 30 and 32 are mounted.
  • the rotary member 19 and pulley 20 rotates inthe direction by an angular distance corresponding to the length in the the strands 1 to be fedinto the apparatus and in this case, the strands l are twisted in the lefthand direction by an amount corresponding to the rotational movement of the ring-shaped rotary member 19.
  • the twisting pitch will change stepwise from d to d m.
  • the number of twists in the lefthand twisting per meter of the stranded conductor will change from Ila-d to I/rrd
  • the reel shaft 16 and accordingly, the reel thereon is rotated in the counter-clock direction in a constant speed ratio to the paying-out or feeding speed of the strands 1 by the capstan 16 while maintaining the rotary member 19 in its rotational movement, then the rotary member 19 is forced to rotate in the same direction as the reel due to the tension on the strands 1 against the torque of the torque motor and the rotation speed of the ring-shaped rotary member 19 is delayed from that of the reel by a time period necessary to wind at turn of the stranded conductor about the entire circumference of the reel drum.
  • variable pitch twisting in which the number of twists per meter of the stranded conductor in the right-hand twisting changes from N/V (1/'n'd to N/V l/rrd, will be obtained.
  • the twisting pitch is determined depending upon the rotation speed of the ring-shaped rotary member and the paying-out speed of the strands by the capstan and that the stranded conductor is wound about the reel drum by the difference in rotation speed between the reel and ring-shaped rotary member.
  • FIG. 4 shows another type of apparatus employed in carrying out the process of the invention in a somewhat different manner.
  • the apparatus of FIG. 4 is different from the apparatus shown in FIGS. 1 through 3 in that the capstan 6, the transmission mechanism 42, 41 and 43 associated with the capstan and the torque motor 35 employed in the apparatus of FIGS. 1 through 3 are eliminated and instead the V-sheave 29 is fixedly mounted on the main drive shaft 12. Therefore, in the apparatus of FIG. 4, the ring-shaped rotary member 19 is rotated in the same direction as the reel 18 in the forward or reverse direction by two pairs of V-sheaves 36, 37 and 28, 29 and endless members trained thereover maintaining a eonstant rotation speed ratio to the rotation speed of the reel.
  • the flyer 13 is rotated in the same direction and substantially at the same speed as the ring-shaped rotary member or the flyer is rotatedin the same direction as the ring-shaped rotary member at a different speed from that of the rotary member having a greater difference speedithan that which the rotation speed of the ring-shapedmember has with respect to that of the reel.
  • the feeding speed of the strands is determined depending upon the speed at which the stranded conductor is wound about the reel drum, the variation range of twisting pitch will be wider than that obtainable in the apparatus of FIGS. 1 through 3.
  • FIG. 4 is simplified with respect to that shown in the preceding figures and accordingly, the process using the simplified apparatus can be performed at leassexpenses than those by the apparatus of FIGS. 1 through 3. And in the apparatus of FIG.4, since the rotating parts are simultaneously driven from the common drive shaft, as compared with the apparatus of the preceding figures, abrupt stoppage and rapid acceleration of the apparaus of FIG. 4 can be done with greater easiness.
  • FIG. 5 shows another type of apparatus employed in carrying out the process of the invention for producing a constant pitch stranded conductor.
  • the separate strands 1 are payed out at a constant speed by the capstan 6 to pass through the holed guide plate 7 and then through the rotary twisting member 8 where the separate strands are twisted together.
  • the strands issue from the stranding member 8 in the form of a stranded conductor 2 and the conductor then passes in contact with the outer rim of the rotating flyer 13 which prevents the conductor from contacting the flange at the leading end of the rotating reel 18 to and onto the drum of the reel to be wound thereabout in the same manner as mentioned in connection with the operation using the apparatus of FIG. 3.
  • the ring-shaped rotary member 19 is rotated by the main drive shaft 12 through the V- sheaves 28, 29 and the endless member trained thereover in a constant ratio to the feeding speed of the strands to feed the strands to and onto the reel drum while twisting them together into a constant pitch stranded conductor and the reel 18 is rotated from the torque motor 35 through the V-sheaves 36, 37 and the endless member trained thereover to wind the stranded conductor about the reel drum while being pulled toward the ring-shaped rotary member under the tension on the stranded conductor. Furthermore, in the apparatus of FIG.
  • the rotation speed of the ring-shaped rotary member relative to that of the reel varies in proportion to increase in the diameter of the stranded conductor on the reel drum and accordingly, in the operation using the apparatus of FIG. 5, when the feeding speed of the strands per minute is expressed by V'"/min. and the rotation speed of the ring-shaped rotary member per minute is expressed by N. r.p.m., the number of twists per meter of the stranded conductor will be N/V.
  • the difference in rotation speed between the reel and ring-shaped rotary member wll vary depending upon a particular strand feeding speed and variation in the diameter of the stranded conductor as the conductor is wound about the reel drum in the same manner as mentioned hereinaboe, In such a case, the number of twists per meter of the stranded conductor will be as follows:
  • the number of twists per meter of the stranded conductor will be as follows:
  • the torque motor may be replaced by a mechanical or electromagnetic brake.
  • the stranded conductor production operations described hereinabove are examples of the process of the invention wherein the process of the invention is conducted in a takeup type apparatus, but the process of the invention can be equally applied to the production of a stranded conductor in a paying-out type apparatus.
  • a plurality of strands having the same length are previously wound about the reel drum in a predetermined parallel relationship and the reel having the strands wound thereon is fixedly mounted on the reel shaft.
  • the wound strands are payed out or unwound from the reel and passed through the twisting member provided in a plane of an extension line of the axis of the shaft of the reel while being ro tated along the flnage at one end of or the leading end of the reel and twisted together thereby to provide a stranded conductor.
  • the grooved guide pulleys on the ring-shaped rotary member must be employed in the number corresponding to that of the strands employed and these guide pulleys must be arranged in substantilly a symmetrical relationship about the shaft of the reel so that they can serve as mean which arrange the strands in a predetermined pattern.
  • These guide pulleys also serve as means which keep the strands in a separated relationship. Since the guide pulleys serve to guide the individiual strands respectively, they may be of smaller size and lighter weight as compared with the corresponding single guide pulley employed in carrying out the process in the take-up type apparatus.
  • the arrangement of the guide pulleys 20, 21, 22 and 23 shown in FIG. 2 is that for the paying-out application and the broken lines 2, 3, 4 and 5 in this figure show the individual strands as being payed out of the reel drum.
  • the flyer is rotated in the same direction as the ring-shaped rotary member and at the same speed 'as or a speed higher than that of the ring-shaped rotary member.
  • The-outer rim of the flyer not only prevents the strands from contacting the flange at the leading end of the reel, but also assists the individual strands in rotating or allows the strands to automatically rotate under the tension on these strands.
  • the purpose for subjecting the individual strands to a tension sufficient to positively twist them together can be attained by the rotation torque to be imparted to the ring-shaped rotary member by the torque motor of FIG. 3 or braking force to be imparted to the rotary member by a brake device (not shown) and in the application of FIG. 4, the same purpose can be attained by tension to be imparted to the individual strands when they are twisted together.
  • the rotation force or braking force to be imparted to the reel by the torque motor of that figure or braking force to be applied to the reel by a brake device (not shown) can attain the same purpose.
  • a restraining member having a ring-shaped or cylindrical outer periphery is provided in a suitable position in the path of the conductor or strands between the guide pulleys and twisting member thereby to enhance the effects of the process of the invention.
  • a method of manufacturing a cable from a plurality of cable elements which comprises:

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Ropes Or Cables (AREA)
  • Processes Specially Adapted For Manufacturing Cables (AREA)
  • Wire Processing (AREA)
  • Windings For Motors And Generators (AREA)
US00138688A 1970-05-13 1971-04-29 High speed stranded conductor production process Expired - Lifetime US3762150A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP45041097A JPS4828017B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1970-05-13 1970-05-13

Publications (1)

Publication Number Publication Date
US3762150A true US3762150A (en) 1973-10-02

Family

ID=12598961

Family Applications (1)

Application Number Title Priority Date Filing Date
US00138688A Expired - Lifetime US3762150A (en) 1970-05-13 1971-04-29 High speed stranded conductor production process

Country Status (6)

Country Link
US (1) US3762150A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS4828017B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CA (1) CA944638A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2123852C3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2088547B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1353188A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4050640A (en) * 1973-01-13 1977-09-27 Firma Henrich Kg Apparatus for winding wire and the like
EP1253454A3 (en) * 2001-04-27 2004-05-06 Tensor Machinery Ltd. High-speed binder application device for optical cables
CN105719775A (zh) * 2016-04-12 2016-06-29 浙江晨光电缆股份有限公司 一种同心绞线机
CN117877817A (zh) * 2024-03-12 2024-04-12 四川金力电缆集团有限公司 一种扁平型电缆线芯排布成型设备及其方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4886323U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1972-01-20 1973-10-19

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1577521A (en) * 1922-10-04 1926-03-23 Dickinson Cord Tire Corp Cord-making machine
US2143203A (en) * 1937-04-01 1939-01-10 Daniel W Maxham Twister
US2788632A (en) * 1956-01-13 1957-04-16 Haskell Dawes Machine Company Tension control in twisting machines and the like
US2817948A (en) * 1954-03-19 1957-12-31 Cook Mfg Company Wire stranding machine
US3413793A (en) * 1966-04-29 1968-12-03 Western Electric Co Sheave capstan assembly for cable takeup apparatus

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB926757A (en) * 1959-07-23 1963-05-22 Bridgwater Wire Rope Works Ltd A new or improved machine for forming wire strand and wire rope
FR1262649A (fr) * 1960-04-20 1961-06-05 Geoffroy Delore Procédé pour la fabrication de câbles à plusieurs couches et toronneuse pour la mise en oeuvre de ce procédé
FR1315991A (fr) * 1960-12-30 1963-01-25 Siemens Ag Procédé pour câbler par couches des éléments de câblage de câbles de télécommunication
FR1340702A (fr) * 1961-12-08 1963-10-18 Steel Cords Ltd Procédé de fabrication d'un toron métallique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1577521A (en) * 1922-10-04 1926-03-23 Dickinson Cord Tire Corp Cord-making machine
US2143203A (en) * 1937-04-01 1939-01-10 Daniel W Maxham Twister
US2817948A (en) * 1954-03-19 1957-12-31 Cook Mfg Company Wire stranding machine
US2788632A (en) * 1956-01-13 1957-04-16 Haskell Dawes Machine Company Tension control in twisting machines and the like
US3413793A (en) * 1966-04-29 1968-12-03 Western Electric Co Sheave capstan assembly for cable takeup apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4050640A (en) * 1973-01-13 1977-09-27 Firma Henrich Kg Apparatus for winding wire and the like
EP1253454A3 (en) * 2001-04-27 2004-05-06 Tensor Machinery Ltd. High-speed binder application device for optical cables
CN105719775A (zh) * 2016-04-12 2016-06-29 浙江晨光电缆股份有限公司 一种同心绞线机
CN117877817A (zh) * 2024-03-12 2024-04-12 四川金力电缆集团有限公司 一种扁平型电缆线芯排布成型设备及其方法
CN117877817B (zh) * 2024-03-12 2024-05-24 四川金力电缆集团有限公司 一种扁平型电缆线芯排布成型设备及其方法

Also Published As

Publication number Publication date
FR2088547A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1972-01-07
GB1353188A (en) 1974-05-15
DE2123852A1 (de) 1971-11-18
CA944638A (en) 1974-04-02
FR2088547B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1976-03-19
DE2123852B2 (de) 1975-01-30
JPS4828017B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1973-08-28
DE2123852C3 (de) 1975-08-28

Similar Documents

Publication Publication Date Title
US3715877A (en) Communication cable
US3309857A (en) Apparatus for processing cable-like elements
US3732682A (en) Methods of and apparatus for twisting and stranding cable pairs in a tandem operation
US3828538A (en) High-speed double twist twisting apparatus mainly adapted to twist steel wires
US2802328A (en) Cable making machine
US4302924A (en) Wire stranding apparatus
US3762150A (en) High speed stranded conductor production process
US3091074A (en) Apparatus for producing communication cables
US2941348A (en) Manufacture of wire strands, bunches, and cables
US3941166A (en) Machine for alternate twisting of wire or cable
US2526247A (en) Method and apparatus for producing wire strand or rope
US3138914A (en) Wire closing machine
US3774385A (en) Machines and methods for manufacturing ropes, in particular steel cords
US4802328A (en) Method of manufacturing wire ropes and wire rope twisting machine for effecting the same
US4384447A (en) Wire stranding apparatus
US4498281A (en) Apparatus and method of making metallic cord
US3726075A (en) Variable pitch-type cable core twister
US4677816A (en) Stranding machine
US1906543A (en) Stranding
GB1603664A (en) Fly-off strander
US2364984A (en) Strand handling machine
JPH0821274B2 (ja) 圧縮撚線導体の製造装置
US3348369A (en) Stranding apparatus
US3728854A (en) Flyer assembly
USRE23281E (en) Wibe stranding device