Title:
SAFETY CIRCUIT FOR ELECTRIC DEVICE
Document Type and Number:
Japanese Patent JP3023332
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To break operating power to an electric device in an overheating state by providing a safety device equipped with a conductor element thermally close to at least one among plural circuit elements of the electric device energized through operating power.
SOLUTION: The main portion of a safety circuit 37 is contained in a controller, is connected to a power source via a fuse 38, and overcurrent is protected by the fuse 38 so that the circuit is broken. When an on-off switch 18, a relay switch 44, and a bimetal thermostat 48 are closed, a heating element 12 is energized so as to generate heat by passing current via resistive PTC material 26 between conductors 28, 30. The heating element 12 contains a conductive element or a fiber 34, and is connected to operating power, and is extended along the whole length of the heating element 12 from a point 58 to a point 60. The conductive fiber 34 electrically insulated from the PTC material 26, and the conductors 28, 30 is connected to a relay coil so as to cause current to flow.
Inventors:
Joseph El Slash
Application Number:
JP16937497A
Publication Date:
March 21, 2000
Filing Date:
May 23, 1997
Export Citation:
Assignee:
Sunbeam products, ink
International Classes:
H02H5/04; H01H37/76; H05B3/34; H05B3/56; (IPC1-7): H01H37/76; H01C13/00; H02H5/04
Domestic Patent References:
| JP6181028A | ||||
| JP57864A | ||||
| JP494081A | ||||
| JP5790543U | ||||
| JP50139241U |
Attorney, Agent or Firm:
Kawawa Takaho
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