Title:
THERMODETECTING CIRCUIT
Document Type and Number:
Japanese Patent JPH05282978
Kind Code:
A
Abstract:
PURPOSE: To provide a thermodetecting circuit in which on-off states of a switch is reversed by thermodetection higher than a predetermined temperature and the reversed state is kept even when the temperature lowers after the reversal.
CONSTITUTION: This thermodetecting circuit comprises a heat-sensing switch 6a and a switch circuit 8 for converting the action of the heat-sensing switch 6a into change of voltage. The heat-sensing switch 6a changes its shape due to the heat higher than a predetermined temperature, and a shape memory alloy 61a, which keeps its changed shape even if the temperature lowers after it has been changed, is used for driving a contact.
Inventors:
Takemura Hiroshi
Hirokazu Hatakeyama
Hirokazu Hatakeyama
Application Number:
JP10858192A
Publication Date:
October 29, 1993
Filing Date:
March 31, 1992
Export Citation:
Assignee:
MURATA MANUFACTURING CO.,LTD.
International Classes:
G01K11/00; H01H37/32; H01H37/74; H01H9/54; (IPC1-7): H01H37/74; G01K11/00; H01H37/32
Attorney, Agent or Firm:
Keiji Yamamoto
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