Switchless circuit malfunction sensor

Details Switchless circuit malfunction sensor Switchless circuit malfunction sensor

1979-04-09

1980-11-25

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

With particular system function

340651, 340652, G08B 2100

Patent

active

042361460

ABSTRACT:
A switchless circuit malfunction sensor utilizes only two leads, connecting open circuit sensors in parallel across the leads and closed circuit sensors in series in line with the leads. A continuity module at one end of the sensor line permits the wiring status of the monitored circuit to be constantly monitored for breaks or shorts. The continuity module can be coupled to an alarm system to activate an audio or visual signal if a circuit malfunction is sensed.

REFERENCES:
patent: 3699569 (1972-10-01), Lee

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