Trip alarm circuit

Details Trip alarm circuit Trip alarm circuit

1978-02-16

1980-01-22

Waring, Alvin H.

Communications: electrical

Condition responsive indicating system

With particular system function

340523, G08B 1900

Patent

active

041852770

ABSTRACT:
A trip circuit and an off-normal anticipatory circuit that are each triggered by independent switch contacts and must be in accord in order to allow shutdown to occur, are each provided with an additional set of sensor switch contacts connected in series with the first respective contacts for increased reliability.

REFERENCES:
patent: 3665399 (1972-05-01), Zehr et al.
patent: 3917001 (1975-11-01), Davis et al.

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