Sequence switching circuit with latching alarm

Details Sequence switching circuit with latching alarm Sequence switching circuit with latching alarm

1976-10-26

1978-11-14

Yosko, Donald J.

Communications: electrical

Condition responsive indicating system

Specific condition

340 63, 340164R, 340523, 340543, 361171, E05B 4506, G08B 2900

Patent

active

041258339

ABSTRACT:
A sequence switching circuit including a plurality of two state DPDT switches for controlling the coupling of an energy source to either an output terminal or an alarm terminal, said switching circuit including interconnection means between said plurality of switches for coupling said energy source to said output terminal upon the changing of the state of said switches in a predetermined sequence, and for coupling said source of energy to said alarm terminal upon the changing of the state of any switch in a sequence other than the predetermined sequence. Said switching circuit further includes means for continuing the coupling of the energy source to said alarm terminal once said coupling has begun until all said switches are returned to their original state, and further until override means are actuated. The switching circuit further includes means for altering said predetermined sequence in a simple and easy manner.

REFERENCES:
patent: 2819770 (1958-01-01), Gibbs
patent: 2843843 (1958-07-01), Davis
patent: 3392558 (1968-07-01), Hedin et al.
patent: 3453591 (1969-07-01), Perez
patent: 3587950 (1971-06-01), Haish
patent: 3609738 (1971-09-01), Marte
patent: 3611287 (1971-10-01), Hoff
patent: 3710316 (1973-01-01), Kromer
patent: 3731156 (1973-05-01), Watson
patent: 3756341 (1973-09-01), Tonkowich et al.
patent: 3790933 (1974-02-01), Cort
patent: 3858193 (1974-12-01), Bach

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