GB528677A - Improvements in or relating to insulated electric conductors - Google Patents

Improvements in or relating to insulated electric conductors

Info

Publication number
GB528677A
GB528677A GB6829/39A GB682939A GB528677A GB 528677 A GB528677 A GB 528677A GB 6829/39 A GB6829/39 A GB 6829/39A GB 682939 A GB682939 A GB 682939A GB 528677 A GB528677 A GB 528677A
Authority
GB
United Kingdom
Prior art keywords
march
calcium oxide
magnesia
insulation resistance
powdered
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
GB6829/39A
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.)
SOLUTION TRUST Ltd
Original Assignee
SOLUTION TRUST 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 SOLUTION TRUST Ltd filed Critical SOLUTION TRUST Ltd
Publication of GB528677A publication Critical patent/GB528677A/en
Expired legal-status Critical Current

Links

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
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
    • 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

Landscapes

  • Inorganic Insulating Materials (AREA)

Abstract

528,677. Cables. SOLUTION TRUST, Ltd. March 2, 1939, No. 6829. Convention date, March 2, 1938. [A Specification was laid open to inspection under Sect. 91 of the Acts, Sept. 18, 1939.] [Class 36] In a cable of the type having a central core separated from a metal sheath by powdered mineral insulating material, the material is calcium oxide or analogous mineral insulation which, on exposure to the atmosphere, retains higher insulation resistance than powdered magnesia in similar circumstances. Numerical values of comparative " limit insulation resistance " are given. The effect is attributed in part to swelling and in part to formation of a carbonate skin, both tending to exclude further ingress of air. A mixture of calcium oxide-and magnesia may be used.
GB6829/39A 1939-02-16 1939-03-02 Improvements in or relating to insulated electric conductors Expired GB528677A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR843062T 1939-02-16
FR160239X 1939-02-16

Publications (1)

Publication Number Publication Date
GB528677A true GB528677A (en) 1940-11-05

Family

ID=26213827

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6829/39A Expired GB528677A (en) 1939-02-16 1939-03-02 Improvements in or relating to insulated electric conductors

Country Status (7)

Country Link
US (1) US2351056A (en)
BE (1) BE432967A (en)
CH (1) CH213329A (en)
DE (1) DE882437C (en)
FR (1) FR843062A (en)
GB (1) GB528677A (en)
NL (1) NL54441C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4280932A (en) * 1979-02-12 1981-07-28 General Electric Company Magnesia insulated heating elements

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2890263A (en) * 1952-11-18 1959-06-09 Hackethal Draht & Kabelwerk Ag Coaxial cables
US3239784A (en) * 1961-01-23 1966-03-08 Schwartz Charles Aaron Coil structure for a welding transformer
US3909555A (en) * 1974-10-16 1975-09-30 Kaman Sciences Corp Phase stable transmission cable with controlled thermal expansion characteristics
US4085653A (en) * 1976-09-15 1978-04-25 General Electric Company Ignition device
FR2575321B1 (en) * 1984-12-21 1988-01-15 Thermocoax Cie ARMORED CABLE WITH MINERAL INSULATION
DE8900876U1 (en) * 1989-01-26 1989-08-10 Siemens AG, 1000 Berlin und 8000 München Heating element
US5247158A (en) * 1992-07-17 1993-09-21 Watlow Electric Manufacturing Company Electrical heater
AU777791C (en) * 1999-08-16 2005-05-26 Temperature Management Systems (Proprietary) Limited Metallurgical thermocouple
US20110100667A1 (en) * 2009-11-04 2011-05-05 Peter Hardie Audio cable with vibration reduction
US10966290B2 (en) 2017-02-01 2021-03-30 Nvent Services Gmbh Low smoke, zero halogen self-regulating heating cable

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4280932A (en) * 1979-02-12 1981-07-28 General Electric Company Magnesia insulated heating elements

Also Published As

Publication number Publication date
FR843062A (en) 1939-06-26
BE432967A (en)
CH213329A (en) 1941-01-31
US2351056A (en) 1944-06-13
DE882437C (en) 1953-05-28
NL54441C (en)

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