US2429635A - Application of insulating material to electric cables - Google Patents

Application of insulating material to electric cables Download PDF

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Publication number
US2429635A
US2429635A US568376A US56837644A US2429635A US 2429635 A US2429635 A US 2429635A US 568376 A US568376 A US 568376A US 56837644 A US56837644 A US 56837644A US 2429635 A US2429635 A US 2429635A
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US
United States
Prior art keywords
cable
tape
insulating material
application
electric cables
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
US568376A
Inventor
Maddock Alan Julian
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Application granted granted Critical
Publication of US2429635A publication Critical patent/US2429635A/en
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/861—Hand-held tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/02—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material
    • B29C63/04—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material by folding, winding, bending or the like
    • B29C63/08—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material by folding, winding, bending or the like by winding helically
    • B29C63/10—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material by folding, winding, bending or the like by winding helically around tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/04—Dielectric heating, e.g. high-frequency welding, i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/14—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for joining or terminating cables
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/46—Dielectric heating
    • H05B6/62—Apparatus for specific applications
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
    • B29L2031/3462—Cables

Definitions

  • the invention consists in such a tool comprising means for applying the tape to the cable and means for passing a high-frequency electric current through the tape at substantially the same time as the tape is being applied to the cable.
  • Fig. 1 a cable having an inner metallic conductor W and an outer layer P of insulating material.
  • a tape T of insulating material is to be wound in acontlnuous P comprise thermoplastic material.
  • the tool by which this simultaneous winding and heating is effected consists of a box B having a suitable handie H and having an extension arm on one side for carrying the spool or roll R of insulating tape.
  • the heating is effected by subjecting the tape, being a dielectric material, to a high-frequency electric current so that, as is well known, heating results from the high-frequency current passing through the dielectric.
  • a generator unit is housed within the box B, and one Of its output leads is taken directly to an electrode E, which forms the bottom of the box B and is shaped to the contour of the cable.
  • the other lead L is taken from the box 13 to the inner conductor W of the cable.
  • the tape '1 from the roll R. is passed through a slot F in the curved electrode E on to the cable itself, so that as the tool is rotated by hand around the cable as shown by the arrow, the tape is unwound from the supply roll R and 8 Claims. (Cl. 57-6) ,2 wound onto the cable. frequency potential is applied across the tape and the insulation P on the cable between the outer electrode E and the inner conductor W. In this way the tape lying under the electrode E is heated, with consequent "welding to the cable insulation and to the adjacent layers oi' tape.
  • the progressive axial movement of the tool ensures that the tape is laid in helical form with any desired amount of overlap.
  • the element constituting the inner electrode of the high frequency system has been-shown as the innermost wire W; but obviously this is not necessarily so, and the choice will depend upon the structure of the cable being treated.
  • the lead L may be connected to this braiding instead of to the core.
  • the lead L of stout material is taken around in the circumferential direction to a counter-electrode C of any desired form.
  • the electrode C is shown, for example, as comprising a wheel situated more or less diametrically opposite to the centre of the other electrode E.
  • a tool for winding tape onto a cable or the like comprising a high-frequency generator, a tape-spool carrier mounted on a. member adapted to engage the periphery of the cable under which member the tape from the Spool is fed onto the cable, an electrical connectlon'trom one output terminal or the generator to said member, and a lead from the other output terminal of the generator for making electrical connection to a metallic interior component of the cable.
  • a tool for winding tape onto a cable or the like comprising a high-frequency generator, a
  • tape-spool carrier mounted on one of a plurality of members adapted to engage the cable on substantially opposite sides and to press the tape frequency current and a, pair of electrodes for application of the high frequency current to the cable, and at least one or said electrodes being At the same time a high icausedzto move about the periphery of the cable 7 as-the tape is being wrapped therearound.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulated Conductors (AREA)
  • Manufacturing Of Electric Cables (AREA)

Description

Oct. 28, 1947. MADDOCK 2,429,635
APPLICATION OF INSULATING MATERIAL T0 ELECTRIC CABLES Filed Dec. 15, 1944 INVENTOR Hum Tuunn Hapyoc.
AI'FORNE ratentea UCI. 0, IUI'I UNITED s'rarss PATENT" OFF-ICE APPLICATION OF INSULATING MATERIAL TO ELECTRIC CABLES Alan Julian Maddock, London, England, assignor to Standard Telephones and Cables Limited, London, England, a British company ApplicationDecember 15, 1944, Serial No. 568,376 In Great Britain December 24. 1943 her-coated tape it may be desirable to vulcanize the rubber during wrapping. In both these cases it is a question of applying heat to the tape during the wrapping process, and the present invention is concerned with the provision of a device or tool for effecting the simultaneous wrapping and heating.
The invention consists in such a tool comprising means for applying the tape to the cable and means for passing a high-frequency electric current through the tape at substantially the same time as the tape is being applied to the cable.
The description which follows relates to the accompanying drawings in which Figs. 1, 2 and 3 represent, in diagrammatic perspective, three embodiments of the invention.
In Fig. 1 is shown a cable having an inner metallic conductor W and an outer layer P of insulating material. Around this cable a tape T of insulating material is to be wound in acontlnuous P comprise thermoplastic material. The tool by which this simultaneous winding and heating is effected consists of a box B having a suitable handie H and having an extension arm on one side for carrying the spool or roll R of insulating tape.
The heating is effected by subjecting the tape, being a dielectric material, to a high-frequency electric current so that, as is well known, heating results from the high-frequency current passing through the dielectric. Accordingly a generator unit is housed within the box B, and one Of its output leads is taken directly to an electrode E, which forms the bottom of the box B and is shaped to the contour of the cable. The other lead L is taken from the box 13 to the inner conductor W of the cable.
In use the tape '1 from the roll R. is passed through a slot F in the curved electrode E on to the cable itself, so that as the tool is rotated by hand around the cable as shown by the arrow, the tape is unwound from the supply roll R and 8 Claims. (Cl. 57-6) ,2 wound onto the cable. frequency potential is applied across the tape and the insulation P on the cable between the outer electrode E and the inner conductor W. In this way the tape lying under the electrode E is heated, with consequent "welding to the cable insulation and to the adjacent layers oi' tape.
The progressive axial movement of the tool ensures that the tape is laid in helical form with any desired amount of overlap.
The element constituting the inner electrode of the high frequency system has been-shown as the innermost wire W; but obviously this is not necessarily so, and the choice will depend upon the structure of the cable being treated. For exam ple, as shown in Fig. 3, if there is a metallic braiding BR underneath the outermost layer of thermoplastic material, the lead L may be connected to this braiding instead of to the core. Again it may not be possible to obtain access to any me- In Fig. 2 the lead L of stout material is taken around in the circumferential direction to a counter-electrode C of any desired form. The electrode C is shown, for example, as comprising a wheel situated more or less diametrically opposite to the centre of the other electrode E.
What is claimed is:
1. A tool for winding tape onto a cable or the like comprising a high-frequency generator, a tape-spool carrier mounted on a. member adapted to engage the periphery of the cable under which member the tape from the Spool is fed onto the cable, an electrical connectlon'trom one output terminal or the generator to said member, and a lead from the other output terminal of the generator for making electrical connection to a metallic interior component of the cable.
2. A tool for winding tape onto a cable or the like comprising a high-frequency generator, a
tape-spool carrier mounted on one of a plurality of members adapted to engage the cable on substantially opposite sides and to press the tape frequency current and a, pair of electrodes for application of the high frequency current to the cable, and at least one or said electrodes being At the same time a high icausedzto move about the periphery of the cable 7 as-the tape is being wrapped therearound.
4.- .Atool for winding tape onto acable accordving-to'claim 3 wherein said one or said electrodes includes a portion shaped to conform-substanztially to the contour oi. the cable.
'5; A tool for winding tapeonto a cable accord- .fingzto claim 3 wherein said one of said electrodes includes a wheel adapted to contact the periphery of the cable.
6 6.- Atom for winding tape onto a cable accord- .=;-l ng to claim 3 wherein the other of saidelectrodes -includes means for connecting it to a conductor portion 01 said cable,
, .7. g A tool for-winding tape onto a cable accord- Qing to'claim 3 wherein the other of said electrodes ,.;lncll1des means for-locating it at a point circumferentially spaced around the cable from said one g, eleetrode.
8." Ajtool according-to claim 3 wherein said one 4 electrode includes a portion shaped to conform substantially-to the contour of the cable and the other oi said electrodes includeaa wheel adapted to contact the cable at a-point circumierentlally 5 spaced-about said cable from said one electrode.
ALANJULIANMADDOCK.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS
US568376A 1943-12-24 1944-12-15 Application of insulating material to electric cables Expired - Lifetime US2429635A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB266480X 1943-12-24

Publications (1)

Publication Number Publication Date
US2429635A true US2429635A (en) 1947-10-28

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US568376A Expired - Lifetime US2429635A (en) 1943-12-24 1944-12-15 Application of insulating material to electric cables

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CH (1) CH266480A (en)
GB (1) GB575292A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3118365A (en) * 1964-01-21 Cable lacing apparatus and method

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1007842B (en) * 1953-01-26 1957-05-09 Siemens Ag Device for the insulation of non-circular electrical conductors, in particular sector-shaped conductors for multi-core electrical power cables
DE1042686B (en) * 1955-08-03 1958-11-06 Rheydt Kabelwerk Ag Method and device for the production of electrical cables with two or more sleeves made of different plastics
DE1045509B (en) * 1956-05-29 1958-12-04 Siemens Ag Connection or repair point for the insulation of electrical cables with thermoplastic insulation, in particular of cables with sector-shaped conductors
JPH07504371A (en) * 1992-03-09 1995-05-18 エヌ・ヴェ・レイケム・ソシエテ・アノニム Apparatus and method for applying coatings to elongated objects
DE102009032690A1 (en) * 2009-07-09 2011-01-13 Voith Patent Gmbh Elastic coupling

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1954678A (en) * 1931-12-04 1934-04-10 Gen Electric Electric heating apparatus
US2241283A (en) * 1940-04-20 1941-05-06 Wackerle Lewis Edward Method for forming musical strings
GB545173A (en) * 1940-05-31 1942-05-13 Okonite Co An improved method of heat treating the insulation of electric conductors
US2322903A (en) * 1940-12-27 1943-06-29 Howard M Wilkoff Ignition harness

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1954678A (en) * 1931-12-04 1934-04-10 Gen Electric Electric heating apparatus
US2241283A (en) * 1940-04-20 1941-05-06 Wackerle Lewis Edward Method for forming musical strings
GB545173A (en) * 1940-05-31 1942-05-13 Okonite Co An improved method of heat treating the insulation of electric conductors
US2322903A (en) * 1940-12-27 1943-06-29 Howard M Wilkoff Ignition harness

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3118365A (en) * 1964-01-21 Cable lacing apparatus and method

Also Published As

Publication number Publication date
CH266480A (en) 1950-01-31
GB575292A (en) 1946-02-12

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