Apparatus for improving the reliability of an alarm circuit

Details Apparatus for improving the reliability of an alarm circuit Apparatus for improving the reliability of an alarm circuit

1986-07-01

1989-02-07

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular system function

340506, 340508, G08B 2900

Patent

active

048034657

ABSTRACT:
An adapter module for converting a Class B alarm system to Class A operation. The module includes a first pair of terminals connected to corresponding terminals of a Class B control panel, and second and third pairs of terminals to which Class A alarm loops are connected, one terminal of each of the second and third pairs of terminals being directly electrically connected to a separate terminal of the first pair of terminals.

REFERENCES:
patent: 3212078 (1962-08-01), Shanahan
patent: 3448447 (1969-06-01), Tetherow
patent: 3569964 (1971-03-01), Mande
patent: 3618081 (1971-11-01), Morrow
patent: 3711854 (1973-01-01), Reynolds et al.
patent: 4030095 (1977-06-01), Dalman
patent: 4118694 (1978-10-01), Right
patent: 4249166 (1981-02-01), Schultz
patent: 4253091 (1981-02-01), Frydman
patent: 4529971 (1985-07-01), James

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