US2166796A - Insulated conductor - Google Patents

Insulated conductor Download PDF

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Publication number
US2166796A
US2166796A US125074A US12507437A US2166796A US 2166796 A US2166796 A US 2166796A US 125074 A US125074 A US 125074A US 12507437 A US12507437 A US 12507437A US 2166796 A US2166796 A US 2166796A
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United States
Prior art keywords
conductor
concentric
sheath
rubber
insulation
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Expired - Lifetime
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US125074A
Inventor
Chester R Colbree
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General Electric Co
Original Assignee
General Electric Co
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Publication date
Application filed by General Electric Co filed Critical General Electric Co
Priority to US125074A priority Critical patent/US2166796A/en
Application granted granted Critical
Publication of US2166796A publication Critical patent/US2166796A/en
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Expired - Lifetime legal-status Critical Current

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    • 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
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame

Definitions

  • This invention relates to insulated electrical conductors and more particularly to conductors of the concentric type in which a central conductor and its insulation are surrounded by a second conductor concentric therewith and the latter conductor provided with insulation.
  • the invention has for its object to provide a readily flexible concentric conductor which shall be resistant to heat and of long life.
  • my improved conductor comprises a central core of stranded wire I about which is a thin layer of fibrous insulation 2, such as cotton, a layer of rubber 3 over the fibrous layer, a sheath or layer of felted asbestos 4 about the layer of rubber 3, over which the second conductor 5 consisting of a number of wires is laid up.
  • a layer of fibrous material 6 is applied and outside the latter is a sheath of rubber l which is prevented from adhering to the concentric wires by the fibrous layer.
  • the sheath of asbestos 4 serves to pro-' vide a smooth bed for the wires of the outer conductor 5 to move upon when flexed, to prevent the wires from working or cutting into the rubber under the efl'ect of flexure and to protect it against heat from the outer conductor.
  • asbestos on account of its being an inorganic material is not subject to decay, so that long life of my flexible conductor is insured irrespective of the use to which it may be put.
  • a concentric electric conductor comprising a central core having rubber insulation, a sheath of felted asbestos about said rubber insulation and in contact therewith, concentric wires laid up about said asbestos sheath and readily movable thereon upon flexure of the concentric conductor, and a protecting insulating sheath about said. concentric wires.
  • a flexible concentric electric conductor comprising a stranded central core surrounded by rubber insulation, a. sheath of felted asbestos about said rubber insulation and in contact therewith, a plurality of conductor wires laid up concentrically about said asbestos sheath and readily movable thereon upon flexure oi the concentric 'conductor, fibrous insulation disposed about said concentric wires, and;a rubber sheath about said fibrous insulation.

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  • Insulated Conductors (AREA)

Description

July 18, 1939. c. R. COLBREE 2,166,796
INSULATED CONDUCTOR Filed Feb. 10, 1937 Inventor: Chester 1?. Colbree,
b H i S Att Orv? e g.
Patented July 18, 1939' UNITED STATES PATENT OFFICE INSULATED CONDUCTOR New York Application February 10, 1937, Serial No. 125,074
2 Claims.
This invention relates to insulated electrical conductors and more particularly to conductors of the concentric type in which a central conductor and its insulation are surrounded by a second conductor concentric therewith and the latter conductor provided with insulation. The invention has for its object to provide a readily flexible concentric conductor which shall be resistant to heat and of long life.
As indicated in the accompanying drawing, my improved conductor comprises a central core of stranded wire I about which is a thin layer of fibrous insulation 2, such as cotton, a layer of rubber 3 over the fibrous layer, a sheath or layer of felted asbestos 4 about the layer of rubber 3, over which the second conductor 5 consisting of a number of wires is laid up. Over the second conductor a layer of fibrous material 6 is applied and outside the latter is a sheath of rubber l which is prevented from adhering to the concentric wires by the fibrous layer.
The sheath of asbestos 4, over the rubber insulation 3 of the first conductor, serves to pro-' vide a smooth bed for the wires of the outer conductor 5 to move upon when flexed, to prevent the wires from working or cutting into the rubber under the efl'ect of flexure and to protect it against heat from the outer conductor. Moreover, asbestos on account of its being an inorganic material is not subject to decay, so that long life of my flexible conductor is insured irrespective of the use to which it may be put.
What I claim as new and desire to secure by Letters Patent of the United States is:
1. A concentric electric conductor comprising a central core having rubber insulation, a sheath of felted asbestos about said rubber insulation and in contact therewith, concentric wires laid up about said asbestos sheath and readily movable thereon upon flexure of the concentric conductor, and a protecting insulating sheath about said. concentric wires.
2. A flexible concentric electric conductor comprising a stranded central core surrounded by rubber insulation, a. sheath of felted asbestos about said rubber insulation and in contact therewith, a plurality of conductor wires laid up concentrically about said asbestos sheath and readily movable thereon upon flexure oi the concentric 'conductor, fibrous insulation disposed about said concentric wires, and;a rubber sheath about said fibrous insulation.
CHESTER R. COLBREE.
US125074A 1937-02-10 1937-02-10 Insulated conductor Expired - Lifetime US2166796A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US125074A US2166796A (en) 1937-02-10 1937-02-10 Insulated conductor

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US125074A US2166796A (en) 1937-02-10 1937-02-10 Insulated conductor

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US2166796A true US2166796A (en) 1939-07-18

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2528414A (en) * 1948-02-03 1950-10-31 Bell Telephone Labor Inc Electrical winding

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2528414A (en) * 1948-02-03 1950-10-31 Bell Telephone Labor Inc Electrical winding

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