US2074777A - Concentric cable with mineral insulation - Google Patents

Concentric cable with mineral insulation Download PDF

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Publication number
US2074777A
US2074777A US11156A US1115635A US2074777A US 2074777 A US2074777 A US 2074777A US 11156 A US11156 A US 11156A US 1115635 A US1115635 A US 1115635A US 2074777 A US2074777 A US 2074777A
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US
United States
Prior art keywords
cable
whole
magnesium
conductor
magnesia
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
US11156A
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English (en)
Inventor
Coupier Marcel Marie Jo Eugene
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.)
Pyrotenax Ltd
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US2074777A publication Critical patent/US2074777A/en
Anticipated expiration legal-status Critical
Assigned to PYROTENAX LIMITED reassignment PYROTENAX LIMITED ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: PRECISION MECANIQUE LABINAL, SOCIETE ALSACIENNE CONSTRUCTIONS MECANIQUES
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/54—Heating elements having the shape of rods or tubes flexible
    • H05B3/56—Heating cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/16—Rigid-tube cables
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49879—Spaced wall tube or receptacle

Definitions

  • electric conductors may consist of a central conductor embedded in a mineral insulating material the whole being surrounded by a metallic covering disposed around 5 said insulating material; this latter may be for instance magnesia obtained by submitting magnesium to a suitable treatment in situ"; the whole is further mechanically treated by rolling, drawing or the like, in order to give it finally the 1 length and diameter desired.
  • My present invention has for its object a concentric cable with mineral insulation character- 30 ized by the fact that it contains a solid central conductor surrounded by one or more coaxial tubular conductors, the ring shaped spaces between the different conductors, as well as the space between the last conductor and the cover- 35 ing, being ultimately filled with a mineral powder,
  • magnesia e. g. magnesia
  • the cable represented in the figure may be manufactured by covering the central conductor with one or more helical windings 55 of magnesium wires or tubes; by disposing the resultant whole inside the tubular conductor 2, covering this latter with magnesium wires or tapes as explained above; this whole is then introduced into the covering and steam is caused to flow through the ring shaped spaces 3 and 5 5 whereupon the magnesium is transformed into hydroxide, and further, by heating, into magnesia which expands and fills said spaces almost entirely; the resultant whole is then submitted to rolling, drawing or the like in order to give there to the desired length and diameter.
  • the central conductor around which are wound the magnesium wire or wires is disposed inside the tubular conductor 2 and the magnesium transformed into magnesia by the action of steam and heat.
  • the resultant whole is then rolled or drawn so that it receives a length intermediate its original length and the desired final length.
  • magnesium wires are wound on conductor 2 and the whole is disposed inside the covering.
  • the magnesium is treated by steam, which, this time, does not fiow through space 3 already filled with magnesia; the whole is finally rolled or drawn in order to give thereto its definitive dimensions.
  • a multi-stage method for the manufacture of a magnesia-insulated multiple conductor cable comprising a first stage consisting in substantially encasing a wire which constitutes a first conductor in magnesium windings, then enclosing the said wire and windings in a tubular metallic member of larger diameter which constitutes a second conductor, then passing a fiow of steam between the said two conductors whereby the magnesium is converted into hydroxide form, then heating the whole to convert the hydroxide into magnesia, and finally subjecting the whole to a mechanical lengthening treatment, said treatment being terminated before a length corresponding to the ultimate length of the cable is attained, and a subsequent stage consisting in substantially encasing the product of the preceding stage in magnesium windings, then enclosing the windings in a tubular metallic member of larger diameter, then passing a flow of steam through the magnesium to convert it into hydroxide form, then heating the whole to convert the hydroxide into magnesia and finally subjecting the whole to a
  • a multi-stage method for the manufacture of a magnesia-insulated multiple conductor cable comprising a first stage. consisting in substantially encasing a wire which constitutes a first conductor in magnesium windings, then enclosing the said wire and windings in a tubular metallic member of larger diameter which constitutes a second conductor, then passing a flow of steam between the said two conductors whereby the magnesium is converted into hydroxide form, then heating the whole to convert the hydroxide into magnesia, and finally subjecting the whole to a mechanical lengthening treatment, said treatment being terminated before a length corresponding to the ultimate length of the cable is attained; and subsequent stages, each or which consists in substantially encasing the product of the preceding stage in magnesium windings, then enclosing the windings in a tubular metallic member of larger diameter, then passing a fiow of steam through the magnesium to convert it into hydroxide form, then heating the whole to convert the hydroxide into magnesia and finally subjecting the whole

Landscapes

  • Insulated Conductors (AREA)
  • Communication Cables (AREA)
US11156A 1934-03-14 1935-03-14 Concentric cable with mineral insulation Expired - Lifetime US2074777A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR651805X 1934-03-14

Publications (1)

Publication Number Publication Date
US2074777A true US2074777A (en) 1937-03-23

Family

ID=9004872

Family Applications (1)

Application Number Title Priority Date Filing Date
US11156A Expired - Lifetime US2074777A (en) 1934-03-14 1935-03-14 Concentric cable with mineral insulation

Country Status (6)

Country Link
US (1) US2074777A (de)
BE (1) BE408245A (de)
DE (1) DE651805C (de)
FR (1) FR783182A (de)
GB (1) GB453770A (de)
NL (1) NL39710C (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2905919A (en) * 1956-01-17 1959-09-22 British Insulated Callenders Electric heating cables
US3020334A (en) * 1959-10-01 1962-02-06 Bell Telephone Labor Inc Electrical cable
US3254320A (en) * 1963-08-15 1966-05-31 Babcock & Wilcox Co Electric heaters
US3789130A (en) * 1968-10-18 1974-01-29 Pyrotenax Ltd Hebburn On Tyne Tamper proof electrical cables
US4665281A (en) * 1985-03-11 1987-05-12 Kamis Anthony G Flexible tubing cable system
US4679317A (en) * 1983-11-21 1987-07-14 U.S. Philips Corporation Screened cable insulated by means of mineral insulation material and method of manufacturing such a cable
US5453599A (en) * 1994-02-14 1995-09-26 Hoskins Manufacturing Company Tubular heating element with insulating core
US6800835B1 (en) * 2003-06-16 2004-10-05 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Radio-frequency driven dielectric heaters for non-nuclear testing in nuclear core development
US6830374B1 (en) * 1999-08-16 2004-12-14 Temperature Management Systems (Proprietary) Limited Metallurgical thermocouple
EP2415325A4 (de) * 2009-04-02 2018-02-28 Tyco Thermal Controls LLC Mineralisoliertes skineffekt-heizkabel
US11871486B2 (en) 2017-02-01 2024-01-09 Nvent Services Gmbh Low smoke, zero halogen self-regulating heating cable

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE874955C (de) * 1950-08-01 1953-04-27 Wagener Maschf Vulkanisiergeraet
DE1026385B (de) * 1953-09-30 1958-03-20 Siemens Ag Verfahren zur Herstellung mehradriger elektrischer Starkstromkabel
DE3813481A1 (de) * 1988-04-21 1989-11-09 Siemens Ag Verfahren zum herstellen eines elektrischen rohrheizkoerpers

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2905919A (en) * 1956-01-17 1959-09-22 British Insulated Callenders Electric heating cables
US3020334A (en) * 1959-10-01 1962-02-06 Bell Telephone Labor Inc Electrical cable
US3254320A (en) * 1963-08-15 1966-05-31 Babcock & Wilcox Co Electric heaters
US3789130A (en) * 1968-10-18 1974-01-29 Pyrotenax Ltd Hebburn On Tyne Tamper proof electrical cables
US4679317A (en) * 1983-11-21 1987-07-14 U.S. Philips Corporation Screened cable insulated by means of mineral insulation material and method of manufacturing such a cable
US4665281A (en) * 1985-03-11 1987-05-12 Kamis Anthony G Flexible tubing cable system
US5453599A (en) * 1994-02-14 1995-09-26 Hoskins Manufacturing Company Tubular heating element with insulating core
US6830374B1 (en) * 1999-08-16 2004-12-14 Temperature Management Systems (Proprietary) Limited Metallurgical thermocouple
US6800835B1 (en) * 2003-06-16 2004-10-05 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Radio-frequency driven dielectric heaters for non-nuclear testing in nuclear core development
EP2415325A4 (de) * 2009-04-02 2018-02-28 Tyco Thermal Controls LLC Mineralisoliertes skineffekt-heizkabel
US11871486B2 (en) 2017-02-01 2024-01-09 Nvent Services Gmbh Low smoke, zero halogen self-regulating heating cable
US11956865B2 (en) 2017-02-01 2024-04-09 Nvent Services Gmbh Low smoke, zero halogen self-regulating heating cable

Also Published As

Publication number Publication date
GB453770A (en) 1936-09-14
BE408245A (de)
FR783182A (fr) 1935-07-09
NL39710C (de)
DE651805C (de) 1937-10-20

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