Communications: electrical – Condition responsive indicating system – With particular system function
Patent
1987-04-13
1988-11-15
Crosland, Donnie L.
Communications: electrical
Condition responsive indicating system
With particular system function
34030915, B08B 100
Patent
active
047852895
ABSTRACT:
A timer controlled fire and burglar alarm system using an economical circuit design and battery for prolonged and effective functioning and includes a thermo-electric infrared sensor, a filter and an amplifier to detect signal, a plurality of time priority circuits, a time-delay circuit, a timer controlled alarm setting circuit and timers with time display for setting and disarming of an alert condition and/or driving peripheral devices so as to function as a fire alarm, a burglar alarm and a visitor detection system.
REFERENCES:
patent: 4064507 (1977-12-01), Schmitz
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