Electricity: electrical systems and devices – Safety and protection of systems and devices – Circuit interruption by thermal sensing
Patent
1985-09-27
1986-12-23
Pellinen, A. D.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Circuit interruption by thermal sensing
361178, 307117, 340590, 323909, H02H 504
Patent
active
046316264
ABSTRACT:
A temperature controller with a remote sensor having a high temperature cutoff with circuit means to prevent operation of the unit if tampered with to bypass a safety function. A remote sensor has a thermal fuse and diode feeding a pulsating D.C. voltage to a control circuit having a capacitor and an impedance means to which pulsating D.C. is fed. If the sensor unit is bypassed the thermal fuse in the controller burns out to render the controller inoperative.
REFERENCES:
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patent: 3727105 (1973-04-01), Hochheiser
patent: 3729656 (1973-04-01), Luquain
patent: 3944845 (1976-03-01), Luteran
patent: 4103319 (1978-07-01), Crain et al.
patent: 4361274 (1982-11-01), Raleigh et al.
patent: 4484243 (1984-11-01), Herbst et al.
patent: 4565930 (1986-01-01), Bartels
Blinn Clyde C.
DeBoer T.
Honeywell Inc.
Pellinen A. D.
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