Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1981-06-29
1983-06-14
Swann, III, Glen R.
Communications: electrical
Condition responsive indicating system
Specific condition
337380, 340384E, 340584, 340636, 340693, G08B 1706, G08B 2100
Patent
active
043886175
ABSTRACT:
A fire alarm device has, in a main body, a fire detection means and alarm means controllable by a detection signal from the fire detection means. The fire alarm device, which being independent in itself is installed on a ceiling or wall where the fire can be easily detected and produces an acoustic alarm as soon as the fire is detected. The detection element of the fire detection means is provided in front of a speaker for producing the acoustic alarm. Since the heat due to the fire is concentrated in front of the speaker, the detection element can react quickly.
REFERENCES:
patent: 3297845 (1967-01-01), Mertler
patent: 3392380 (1968-07-01), Fordyce
patent: 3605057 (1971-09-01), Mamiya
patent: 3872470 (1975-03-01), Hoerz et al.
patent: 3892930 (1975-07-01), Wieder
patent: 3932849 (1976-01-01), Welch
patent: 3995268 (1976-11-01), Ferrari
patent: 4258359 (1981-03-01), McLamb
Nakanishi Hiroshi
Nakanishi Takashi
Nakanishi Yoshitaka
Adams Bruce L.
Burns Robert E.
Lobato Emmanuel J.
Swann III Glen R.
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