GB2011724A - Thermal switch - Google Patents

Thermal switch

Info

Publication number
GB2011724A
GB2011724A GB79978A GB7900978A GB2011724A GB 2011724 A GB2011724 A GB 2011724A GB 79978 A GB79978 A GB 79978A GB 7900978 A GB7900978 A GB 7900978A GB 2011724 A GB2011724 A GB 2011724A
Authority
GB
United Kingdom
Prior art keywords
switch
pellet
thermal switch
contact
circuit
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.)
Granted
Application number
GB79978A
Other versions
GB2011724B (en
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.)
Mc Caughna J R
Original Assignee
Mc Caughna J R
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
Priority claimed from US05/851,196 external-priority patent/US4167724A/en
Application filed by Mc Caughna J R filed Critical Mc Caughna J R
Priority to GB79978A priority Critical patent/GB2011724B/en
Publication of GB2011724A publication Critical patent/GB2011724A/en
Application granted granted Critical
Publication of GB2011724B publication Critical patent/GB2011724B/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
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H01H37/764—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material in which contacts are held closed by a thermal pellet
    • H01H37/765—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material in which contacts are held closed by a thermal pellet using a sliding contact between a metallic cylindrical housing and a central electrode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H01H2037/769—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material characterised by the composition of insulating fusible materials, e.g. for use in the thermal pellets

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Thermally Actuated Switches (AREA)
  • Fuses (AREA)

Abstract

In a thermal switch of the kind in which, in the closed position, a contact 500 establishes a circuit path between two terminals 11, 12 and, in response to collapse due to temperature rise of a normally solid fusible pellet 16, the contact 500 changes its position to open the switch and break the circuit, the fusible pellet 16 incorporates a ferrite material in order to prevent premature softening of the pellet 16 whereby a precise temperature of operation of the switch is achieved. <IMAGE>
GB79978A 1977-11-14 1979-01-11 Thermal switch Expired GB2011724B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB79978A GB2011724B (en) 1977-11-14 1979-01-11 Thermal switch

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US05/851,196 US4167724A (en) 1977-11-14 1977-11-14 Thermal switches
GB5150077 1977-12-10
GB79978A GB2011724B (en) 1977-11-14 1979-01-11 Thermal switch

Publications (2)

Publication Number Publication Date
GB2011724A true GB2011724A (en) 1979-07-11
GB2011724B GB2011724B (en) 1982-03-17

Family

ID=27260205

Family Applications (1)

Application Number Title Priority Date Filing Date
GB79978A Expired GB2011724B (en) 1977-11-14 1979-01-11 Thermal switch

Country Status (1)

Country Link
GB (1) GB2011724B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2466093A1 (en) * 1979-09-26 1981-03-27 Nifco Inc THERMAL RUPTEUR
EP1498925A1 (en) * 2002-04-24 2005-01-19 Nec Schott Components Corporation Temperature sensing material type thermal fuse
US7323966B2 (en) 2003-10-28 2008-01-29 Nec Schott Components Corporation Thermal pellet incorporated thermal fuse and method of producing thermal pellet
US7330098B2 (en) 2005-03-17 2008-02-12 Nec Schott Components Corporation Thermal fuse employing a thermosensitive pellet
US7362208B2 (en) 2004-09-17 2008-04-22 Nec Schott Components Corporation Thermal pellet type thermal fuse
US7843307B2 (en) 2007-10-05 2010-11-30 Nec Schott Components Corporation Thermal fuse employing thermosensitive pellet

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2466093A1 (en) * 1979-09-26 1981-03-27 Nifco Inc THERMAL RUPTEUR
EP1498925A1 (en) * 2002-04-24 2005-01-19 Nec Schott Components Corporation Temperature sensing material type thermal fuse
EP1498925A4 (en) * 2002-04-24 2007-06-13 Nec Schott Components Corp Temperature sensing material type thermal fuse
US7323965B2 (en) 2002-04-24 2008-01-29 Nec Schott Components Corporation Thermal fuse using thermosensitive material
US7323966B2 (en) 2003-10-28 2008-01-29 Nec Schott Components Corporation Thermal pellet incorporated thermal fuse and method of producing thermal pellet
US7362208B2 (en) 2004-09-17 2008-04-22 Nec Schott Components Corporation Thermal pellet type thermal fuse
US7330098B2 (en) 2005-03-17 2008-02-12 Nec Schott Components Corporation Thermal fuse employing a thermosensitive pellet
US7843307B2 (en) 2007-10-05 2010-11-30 Nec Schott Components Corporation Thermal fuse employing thermosensitive pellet

Also Published As

Publication number Publication date
GB2011724B (en) 1982-03-17

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee