Title:
Inspection reminder system having a periodically opened alarm nullified by switch actuation at all stations
United States Patent 3127599
US Patent References:
/0990434.html
- - 0990434

Arrangement for night watchman controls
- - 2559746

Sequence counting and locking circuit
- - 2968747


Inventors:
Morris, Smith
Read, Robert C.
Publication Date:
03/31/1964
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Assignee:
GORDON COMPANY INC
Primary Class:
340/306
Other Classes:
340/309.400, 340/523
International Classes:
G08B7/06; G08B25/14; G08B29/10; G08B7/00; G08B29/00