Communications: electrical – Condition responsive indicating system – With particular system function
Patent
1990-11-08
1992-07-14
Swann, III, Glen R.
Communications: electrical
Condition responsive indicating system
With particular system function
34030915, 340547, 340568, 340984, G08B 2300, G08B 1308
Patent
active
051306956
ABSTRACT:
An alarm system includes an electrical energy source; an alarm for producing an alarm signal when electrically coupled to the electrical energy source; a switch for movement from a first position to a second position upon the occurrence of the monitored event; and timing circuitry for being activated when the switch is moved from the first position to the second position, for electrically coupling the alarm to the electrical energy source, for continuing to electrically couple the alarm to the source of electrical energy for a set period of time even if the switch is subsequently moved back to the first position during the set period of time, for deactivating the alarm a certain period of time after the alarm is activated, and for reactivating the alarm a certain period of time after the alarm is deactivated if the switch remains in the second position.
REFERENCES:
patent: 3761912 (1973-09-01), Stettner et al.
patent: 3959789 (1976-05-01), McGahee
patent: 3965465 (1976-06-01), Alexander
patent: 4006451 (1977-02-01), Nobile
patent: 4125826 (1978-11-01), Rasmusset et al.
patent: 4222032 (1980-09-01), Speer
Scarbrough James E.
Scarbrough Kenneth W.
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