GB864967A - Improved over-temperature heater element safety switch - Google Patents

Improved over-temperature heater element safety switch

Info

Publication number
GB864967A
GB864967A GB8832/59A GB883259A GB864967A GB 864967 A GB864967 A GB 864967A GB 8832/59 A GB8832/59 A GB 8832/59A GB 883259 A GB883259 A GB 883259A GB 864967 A GB864967 A GB 864967A
Authority
GB
United Kingdom
Prior art keywords
sleeve
nut
spring
contacts
heater element
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
GB8832/59A
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.)
CONTACTOR Ltd Pty
Original Assignee
CONTACTOR Ltd Pty
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 CONTACTOR Ltd Pty filed Critical CONTACTOR Ltd Pty
Publication of GB864967A publication Critical patent/GB864967A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/46—Thermally-sensitive members actuated due to expansion or contraction of a solid
    • H01H37/48—Thermally-sensitive members actuated due to expansion or contraction of a solid with extensible rigid rods or tubes

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Cookers (AREA)

Abstract

864,967. Thermal switches. CONTACTOR (PROPRIETARY) Ltd. March 13, 1959 [June 10, 1958], No. 8832/59. Class 38 (5). A cut-out for an immersion type resistance heater element, e.g. for an electric kettle, comprises contacts 19, 20 which are normally held closed against the bias of a spring 18 tending to move contact 19 downwards to the dotted position by an adjustable nut 14 on a rod 11 secured at 12 to a sleeve 10 clamped at 9 to the heater 1. The sleeve 10 is fixed at 15 to the sheath 2 of the heater and is formed from brass, the rod 11 having a relatively low expansion. A spring 26 arranged between the nut 14 and the end of the sleeve 10 is bowed outwardly to the left on lowering of the nut 14 due to expansion of the sleeve 10 due to overheating, and the end of the spring 18 is forced out from under the nut to allow the contacts to open. The downward movement of contact 20 is limited by a stop 21a and the contacts are reclosed by depressing a plunger 23 when the sleeve 10 has cooled.
GB8832/59A 1958-06-10 1959-03-13 Improved over-temperature heater element safety switch Expired GB864967A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ZA864967X 1958-06-10

Publications (1)

Publication Number Publication Date
GB864967A true GB864967A (en) 1961-04-12

Family

ID=25578698

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8832/59A Expired GB864967A (en) 1958-06-10 1959-03-13 Improved over-temperature heater element safety switch

Country Status (1)

Country Link
GB (1) GB864967A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3423086A1 (en) * 1983-07-07 1985-01-17 Electrovac Gesellschaft mbH, Wien DEVICE FOR HOT DISPLAY AND FOR CONTROLLING OR LIMITING THE TEMPERATURE OF RADIATION OR CONTACT HEATER FROM ELECTRICAL COOKING EQUIPMENT
GB2261770A (en) * 1991-11-25 1993-05-26 Sheathed Heating Elements Ltd An electrical heating element

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3423086A1 (en) * 1983-07-07 1985-01-17 Electrovac Gesellschaft mbH, Wien DEVICE FOR HOT DISPLAY AND FOR CONTROLLING OR LIMITING THE TEMPERATURE OF RADIATION OR CONTACT HEATER FROM ELECTRICAL COOKING EQUIPMENT
GB2261770A (en) * 1991-11-25 1993-05-26 Sheathed Heating Elements Ltd An electrical heating element

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