GB1389497A - Temperature responsive switches - Google Patents

Temperature responsive switches

Info

Publication number
GB1389497A
GB1389497A GB2640072A GB2640072A GB1389497A GB 1389497 A GB1389497 A GB 1389497A GB 2640072 A GB2640072 A GB 2640072A GB 2640072 A GB2640072 A GB 2640072A GB 1389497 A GB1389497 A GB 1389497A
Authority
GB
United Kingdom
Prior art keywords
ferrite
curie point
permanent magnet
chip
ptc
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
GB2640072A
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.)
Honeywell Inc
Original Assignee
Honeywell Inc
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 Honeywell Inc filed Critical Honeywell Inc
Publication of GB1389497A publication Critical patent/GB1389497A/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
    • H01H37/64—Contacts
    • H01H37/68—Contacts sealed in evacuated or gas-filled tube
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H61/00—Electrothermal relays
    • H01H61/01—Details
    • H01H61/013—Heating arrangements for operating relays

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Thermally Actuated Switches (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

1389497 Magnetic switches HONEYWELL Inc 6 June 1972 [6 Aug 1971] 26400/72 Heading H1N A temperature responsive Curie point switch has a permanent magnet and a piece of ferrite material attracted to each other whilst the ferrite material is below its Curie point and the ferrite material is in intimate heat conducting relationship with a positive temperature coefficient resistor (PTC) with which it s electrically in series. In Fig. 1, the ferrite chip 18 co-operates with a permanent magnet 16 on a contact spring and is electrically in series with a PTC resistor 20. The chip and resistor may be mounted with thermally and electrically conductive layers on each side and between them between terminal members (Fig. 4, not shown). Fig. 5 shows contacts 51, 53 held closed by the attraction of a ferrite chip, on the contact spring 64, to a magnet 62. After heating above the Curie point has permitted the contacts to separate the switch can only be reset by operation of a retractively mounted push button, on which the permanent magnet is mounted, if the ferrite is below its Curie point. Arrangements such as that of Fig. 1 may be provided with two PTC resistors having respective switching temperatures above and below the ferrite Curie point.
GB2640072A 1971-08-06 1972-06-06 Temperature responsive switches Expired GB1389497A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA120024 1971-08-06

Publications (1)

Publication Number Publication Date
GB1389497A true GB1389497A (en) 1975-04-03

Family

ID=4090532

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2640072A Expired GB1389497A (en) 1971-08-06 1972-06-06 Temperature responsive switches

Country Status (9)

Country Link
US (1) US3760310A (en)
JP (1) JPS4828975A (en)
BE (1) BE786183A (en)
CA (1) CA921523A (en)
DE (1) DE2238341A1 (en)
FR (1) FR2148500A1 (en)
GB (1) GB1389497A (en)
IT (1) IT969323B (en)
NL (1) NL7210562A (en)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3936626A (en) * 1972-10-25 1976-02-03 Chemetron Corporation Method of heating comestibles
BE811146A (en) * 1973-07-18 1974-06-17 ELECTROMAGNETIC OVEN FOR AUTOMATIC AND SIMULTANEOUS HEATING AT VARIOUS TEMPERATURES OF PRODUCTS OF VARIOUS NUMBER AND DIMENSIONS
US3976961A (en) * 1973-07-18 1976-08-24 Chemetron Corporation Sensor-detector assembly for microwave oven
JPS5186555A (en) * 1975-01-24 1976-07-29 Toyo Boseki NANNENSEI HORIAMIDOSOSEIBUTSU
US4004259A (en) * 1975-06-25 1977-01-18 Square D Company Temperature responsive electric switch
JPS5221417A (en) * 1975-08-11 1977-02-18 Teijin Ltd Preparation of polyamide fibers
JPS53253A (en) * 1976-06-25 1978-01-05 Toray Ind Inc Polycapsition with improved melt-spinning properties
SE8004951L (en) * 1980-07-04 1982-02-11 Jonny Ruuth THERMOSTAT
JPS5744929A (en) * 1980-08-29 1982-03-13 Aisin Seiki Temperature switch
JPS5744928A (en) * 1980-08-29 1982-03-13 Aisin Seiki Temperature switch
US4414519A (en) * 1982-03-10 1983-11-08 Allied Corporation Temperature-sensitive relay
US4454491A (en) * 1982-05-10 1984-06-12 Allied Corporation Temperature sensing circuit breaker or switch
US4504809A (en) * 1982-12-13 1985-03-12 Lueker Jonathan C Miniature thermomagnetic relay
DE3444223A1 (en) * 1984-12-04 1986-06-05 Ranco Inc., Dublin, Ohio SWITCH RELAY
JPH01144460A (en) * 1987-11-30 1989-06-06 Teijin Ltd Polyamide composition
US5462802A (en) * 1991-12-02 1995-10-31 Teijin Limited Polyamide hollow and/or non-circular fiber and process for making same
TW326049B (en) * 1993-12-22 1998-02-01 Du Pont Nylon containing nucleation additives
US5525948A (en) * 1994-12-02 1996-06-11 Poulsen; Peder U. Manually operated, electromagnetically resettable safety switch
US5742106A (en) * 1995-08-28 1998-04-21 Mikuni Corporation Thermo-sensitive actuator and idle speed controller employing the same
US5907202A (en) * 1995-08-28 1999-05-25 Mikuni Corporation Thermo-sensitive actuator and idle speed controller employing the same
US6020802A (en) * 1998-04-02 2000-02-01 Square D Company Circuit breaker including two magnetic coils and a positive temperature coefficient resistivity element
US20040150504A1 (en) * 2003-01-30 2004-08-05 Nicholson Warren Baxter Resettable ferromagnetic thermal switch
US20070057752A1 (en) * 2005-09-15 2007-03-15 Youfa Wang Heat actuated magnetic latching microswitch
US20170076899A1 (en) * 2015-09-15 2017-03-16 Boise State University Self-resetting power breaker
AU2018306555B2 (en) 2017-07-28 2021-12-23 Maggma Group Ip Limited An improved switch
US11224098B2 (en) * 2018-11-01 2022-01-11 General Electric Company Systems and methods for passive heating of temperature-sensitive electronic components
US11509159B2 (en) * 2019-08-28 2022-11-22 Microsoft Technology Licensing, Llc System and method for thermal cutoff protection device control from an external component

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2718569A (en) * 1951-08-22 1955-09-20 Gunnard Z Johnston Circuit breakers
US3057978A (en) * 1960-10-24 1962-10-09 Mallory & Co Inc P R Thermo-magnetic contact device
DK131528B (en) * 1967-10-07 1975-07-28 Danfoss As Start switch for a single-phase motor.

Also Published As

Publication number Publication date
FR2148500A1 (en) 1973-03-23
NL7210562A (en) 1973-02-08
JPS4828975A (en) 1973-04-17
DE2238341A1 (en) 1973-02-15
BE786183A (en) 1972-11-03
US3760310A (en) 1973-09-18
IT969323B (en) 1974-03-30
CA921523A (en) 1973-02-20

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Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed