Title:
ELECTRIC SYSTEM WITH CIRCUIT PROTECTING PTC DEVICE
Document Type and Number:
Japanese Patent JPS5632637
Kind Code:
A
Abstract:
An electrical systems is described in which a PTC device (20) is used to protect a circuit against a thermal or electrical fault. The systems comprise two circuits (17, 18) one containing a PTC device (20) and the other containing a resistor (23, 23a) which is thermally coupled to the PTC device and which is heated when a fault condition occurs; this heating of the resistor (23, 23a) converts the PTC device (20) to the high resistance state and thus causes a desired change in the electrical condition of one or both circuits. The circuit can be used for the electrical circuitry of an electric blanket.
Inventors:
FURANKU ANSONII DORUJIYATSUKU
RII MAAKU MIDORUMAN
RII MAAKU MIDORUMAN
Application Number:
JP11291980A
Publication Date:
April 02, 1981
Filing Date:
August 16, 1980
Export Citation:
Assignee:
RAYCHEM CORP
International Classes:
H01C7/02; H01H37/32; H02H5/04; H02H7/22; H05B3/34; (IPC1-7): H01H37/32
Domestic Patent References:
| JP50155571B | ||||
| JP41004498A | ||||
| JPS4815527U | 1973-02-21 |