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GB1474978A - Temperature operated switches - Google Patents

Temperature operated switches

Info

Publication number
GB1474978A
GB1474978A GB4214674A GB4214674A GB1474978A GB 1474978 A GB1474978 A GB 1474978A GB 4214674 A GB4214674 A GB 4214674A GB 4214674 A GB4214674 A GB 4214674A GB 1474978 A GB1474978 A GB 1474978A
Authority
GB
United Kingdom
Prior art keywords
permanent magnet
magnet
switch
sept
contact unit
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
GB4214674A
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.)
Tokin Corp
Original Assignee
Tohoku Metal Industries 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 Tohoku Metal Industries Ltd filed Critical Tohoku Metal Industries Ltd
Publication of GB1474978A publication Critical patent/GB1474978A/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
    • H01H37/58—Thermally-sensitive members actuated due to thermally controlled change of magnetic permeability
    • H01H37/585—Thermally-sensitive members actuated due to thermally controlled change of magnetic permeability the switch being of the reed switch type

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

1474978 Curie point switches TOHOKU METAL INDUSTRIES Ltd 27 Sept 1974 [27 Sept 1973] 42146/74 Heading H1N A curie point switch 8 has a magnetic reed contact unit with a permanent magnet and a ferromagnetic body having a temperature related permeability adjacent or around the contact unit to provide a closed magnetic loop with the reeds and an auxilary permanent magnet 30 or 31 is rotatably mounted in the vicinity of the permanent magnet and ferromagnetic body so as to have a variable influence on the switch. A magnet similar to that of Fig. 2a may be of disc shape and have a screwdriver slot allowing for rotation in a switch casing (Fig. 5, not shown). The magnet 31 of Fig. 3 is rotatable about its longitudinal axis and two halves thereof on opposite sides of a plane passing through the axis are magnetized in opposite directions.
GB4214674A 1973-09-27 1974-09-27 Temperature operated switches Expired GB1474978A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10793873A JPS5533582B2 (en) 1973-09-27 1973-09-27

Publications (1)

Publication Number Publication Date
GB1474978A true GB1474978A (en) 1977-05-25

Family

ID=14471841

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4214674A Expired GB1474978A (en) 1973-09-27 1974-09-27 Temperature operated switches

Country Status (3)

Country Link
US (1) US3903492A (en)
JP (1) JPS5533582B2 (en)
GB (1) GB1474978A (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5112965U (en) * 1974-07-15 1976-01-30
US4092586A (en) * 1975-10-20 1978-05-30 General Electric Company Temperature-sensing circuit
JPS5544257Y2 (en) * 1975-10-23 1980-10-17
JPS5852593Y2 (en) * 1977-11-07 1983-11-30 ティーディーケイ株式会社 Temperature sensitive reed switch
JPS5941256B2 (en) * 1979-05-14 1984-10-05 東北金属工業株式会社 Band-operated thermal reed switch
US4449094A (en) * 1981-06-10 1984-05-15 Westinghouse Electric Corp. Temperature compensated magnetic damping assembly for induction meters
US4516101A (en) * 1983-05-02 1985-05-07 Tohoku Metal Industries, Ltd. Air-flow-rate sensors
US5168545A (en) * 1991-02-13 1992-12-01 Robertshaw Controls Company Temperature operated control system, control device therefor, and methods of making the same
US7323667B2 (en) * 2005-03-18 2008-01-29 Pratt & Whitney Canada Corp. Curie temperature thermostat for a eddy current heating device and method
US7258526B2 (en) * 2005-03-18 2007-08-21 Pratt & Whitney Canada Corp. Eddy current heating for reducing transient thermal stresses in a rotor of a gas turbine engine
KR101153117B1 (en) * 2011-02-25 2012-06-04 엘에스산전 주식회사 Circuit breaker
DE102011005414A1 (en) * 2011-03-11 2012-09-13 Robert Bosch Gmbh Charging device with safety shutdown
EP2644826A1 (en) * 2012-03-27 2013-10-02 Siemens Aktiengesellschaft A system for inductive heating of turbine rotor disks

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3812441A (en) * 1971-12-03 1974-05-21 Nippon Automation Kk Reed switch mechanism making use of heat-sensitive ferrite
JPS4938912A (en) * 1972-08-11 1974-04-11

Also Published As

Publication number Publication date
US3903492A (en) 1975-09-02
JPS5533582B2 (en) 1980-09-01
JPS5059776A (en) 1975-05-23

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years

Effective date: 19940926