Communications: electrical – Condition responsive indicating system – With particular system function
Patent
1980-02-05
1982-03-23
Waring, Alvin H.
Communications: electrical
Condition responsive indicating system
With particular system function
340541, 340546, 340628, G08B 1900, G04C 2312
Patent
active
043215912
ABSTRACT:
Portable, self-powered multiple warning device, including an alarm clock, a smoke or gas detector, a common power source for powering the alarm clock and smoke or gas detector, first warning means for issuing an activation signal for the alarm clock and second warning means for issuing an activation signal for the smoke or gas detector.
REFERENCES:
patent: 4093944 (1978-06-01), Muncheryan
Greenberg Laurence A.
Lerner Herbert L.
Waring Alvin H.
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