GB1180456A - Electrical Heating Units - Google Patents

Electrical Heating Units

Info

Publication number
GB1180456A
GB1180456A GB5364667A GB5364667A GB1180456A GB 1180456 A GB1180456 A GB 1180456A GB 5364667 A GB5364667 A GB 5364667A GB 5364667 A GB5364667 A GB 5364667A GB 1180456 A GB1180456 A GB 1180456A
Authority
GB
United Kingdom
Prior art keywords
zircaloy
oxidized
metal
oxide layer
insulating cylinder
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
GB5364667A
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.)
Atomic Energy of Canada Ltd AECL
Original Assignee
Atomic Energy of Canada Ltd AECL
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 Atomic Energy of Canada Ltd AECL filed Critical Atomic Energy of Canada Ltd AECL
Publication of GB1180456A publication Critical patent/GB1180456A/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
    • H05B3/46—Heating elements having the shape of rods or tubes non-flexible heating conductor mounted on insulating base
    • 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
    • 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

Landscapes

  • Resistance Heating (AREA)

Abstract

1,180,456. Electrical insulation of heater elements. ATOMIC ENERGY OF CANADA Ltd. 24 Nov., 1967 [21 March, 1967], No. 53646/67. Heading H5H. An oxide layer of ZIRCALOY-2 (defined in the Specification) on the surface of ZIRCALOY- 2 metal is used to electrically insulate a resistive heating element, which is used for immersion heating. A tubular element 10 of ZIRCALOY-2 metal is blasted inside and outside with glass shot and then oxidized in air at 650‹ C. for a predetermined time to form an oxide layer 13 thereon of a given thickness. The layer is ground off at 17 to make connections to the heater terminals 12, 12a. The heating unit 14 is slipped inside a steel pipe 16 and oxidized further until tight therein. The deep circumferential slits 11 in element 10 increase its effective resistance. A ribbon 35, Fig. 4, of ZIRCALOY-2 metal is oxidized as above and then wound around an insulating cylinder 30 in a channel 31a thereof and brazed to terminals 38. A steel protection sleeve 47 is provided. If desired, an oxidized ZIRCALOY-2 metal tube 26a, Fig. 3, is used to protect a heating element comprising a resistance wire 22a around a helically slotted insulating cylinder 20a. The oxide layer is formed by the method of Specification 1,168,371.
GB5364667A 1967-03-21 1967-11-24 Electrical Heating Units Expired GB1180456A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA985813 1967-03-21

Publications (1)

Publication Number Publication Date
GB1180456A true GB1180456A (en) 1970-02-04

Family

ID=4142849

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5364667A Expired GB1180456A (en) 1967-03-21 1967-11-24 Electrical Heating Units

Country Status (1)

Country Link
GB (1) GB1180456A (en)

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