GB632534A - Improvements in or relating to insulated electric cables - Google Patents

Improvements in or relating to insulated electric cables

Info

Publication number
GB632534A
GB632534A GB2035747A GB2035747A GB632534A GB 632534 A GB632534 A GB 632534A GB 2035747 A GB2035747 A GB 2035747A GB 2035747 A GB2035747 A GB 2035747A GB 632534 A GB632534 A GB 632534A
Authority
GB
United Kingdom
Prior art keywords
sheath
metal
tape
layer
foil
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
Application number
GB2035747A
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.)
EDWARD PERCY HOLMES
Original Assignee
EDWARD PERCY HOLMES
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 EDWARD PERCY HOLMES filed Critical EDWARD PERCY HOLMES
Priority to GB2035747A priority Critical patent/GB632534A/en
Publication of GB632534A publication Critical patent/GB632534A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • 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
    • H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
    • H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
    • H01B13/245—Sheathing; Armouring; Screening; Applying other protective layers by extrusion of metal layers

Abstract

632,534. Electric cables. HOLMES, E. P. July 28, 1947, No. 20357. [Class 36] In order to protect the paper insulation 2 from the heat produced when a cable is provided with a sheath 6 of extruded copper, aluminium, or other high melting point metal, a heatprotective layer of metal 3 is provided to cover the insulation and an air space is left between the layer 3 and the sheath 6. The layer 3 may consist of a wound tape of metal or metallized paper or cellulosic material. Aluminium foil backed with paper may be used. The surface of the metal may be bright to provide good heat reflecting qualities. As shown in Fig. 2, the metal foil 3 may be crinkled or otherwise formed with projections 4 to separate it from the sheath and form air-spaces 5. The sheath may alternatively be separated from the foil 3 by a helical winding of asbestos cord. Fig. 4 shows a modification in which the paper-backed aluminium foil 8 is covered with cotton tape 9 having entwined metal strands which make contact with the sheath 6. The tape may become charred when the sheath is extruded but the insulation within the foil 8 is unaffected. The overlapping turns of the tape maintain airspaces 5. Fig. 5 shows a further modification in which the protective layer consists of a wound tape comprising a cellulosic layer 11 and a layer 10 of aluminium foil, one edge of the compound tape being folded over as shown at 12 to form air-spaces 5.
GB2035747A 1947-07-28 1947-07-28 Improvements in or relating to insulated electric cables Expired GB632534A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2035747A GB632534A (en) 1947-07-28 1947-07-28 Improvements in or relating to insulated electric cables

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2035747A GB632534A (en) 1947-07-28 1947-07-28 Improvements in or relating to insulated electric cables

Publications (1)

Publication Number Publication Date
GB632534A true GB632534A (en) 1949-11-28

Family

ID=10144599

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2035747A Expired GB632534A (en) 1947-07-28 1947-07-28 Improvements in or relating to insulated electric cables

Country Status (1)

Country Link
GB (1) GB632534A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1018120B (en) * 1953-11-30 1957-10-24 Siemens Ag Electrical cable with a waterproof jacket, preferably made of aluminum, in particular a coaxial high-frequency cable with a waterproof outer conductor
DE1040635B (en) * 1956-12-20 1958-10-09 Siemens Ag Electric cable with a heat-sensitive inner lining and a seamlessly pressed aluminum jacket, especially telecommunication cables

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1018120B (en) * 1953-11-30 1957-10-24 Siemens Ag Electrical cable with a waterproof jacket, preferably made of aluminum, in particular a coaxial high-frequency cable with a waterproof outer conductor
DE1040635B (en) * 1956-12-20 1958-10-09 Siemens Ag Electric cable with a heat-sensitive inner lining and a seamlessly pressed aluminum jacket, especially telecommunication cables

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