Resistive device sensor

Details Resistive device sensor Resistive device sensor

1980-02-11

1981-04-07

Caldwell, Sr, John W.

Communications: electrical

Condition responsive indicating system

Specific condition

123145A, 340641, G08B 2100

Patent

active

042609852

ABSTRACT:
A monitoring circuit for electrically conductive resistive devices such as diesel glow plugs in which the devices are fed through an electrically sensitive path, and the voltage across the electrical devices is sensed with respect to a reference. If the sensed voltage is above the reference indicating the presence of a defective device, a warning is indicated. The circuit includes means allowing warm up of the devices before sensing, and for inhibiting signals, which would otherwise indicate a false warning, after a chosen period for sensing.

REFERENCES:
patent: 3626401 (1971-12-01), Flieder et al.
patent: 3675033 (1972-07-01), Richard et al.
patent: 3706031 (1972-12-01), Boutwell et al.
patent: 3855586 (1974-12-01), Jacobs
patent: 3961900 (1976-06-01), Gintelia et al.
patent: 3967281 (1976-06-01), Dageford
patent: 4135145 (1979-01-01), Eberle
patent: 4214236 (1980-07-01), Carp et al.

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