Smoke alarm described is claimed to be only automatic instrument at present available which can be reliably operated either optically or acoustically. (Brief translated abstract) (See also Werft-Reederei-Hafen vol. 12, no. 8, Apr. 15, 1931 pp. 133-134, 6 figs.)
Buchholz automatic smoke alarm
Selbsstaetige Rauchmeldeanlage nach dem BuchholzSystem
Marine Engineer and Motorship Builder ; 54 , n 644
1931
Aufsatz (Zeitschrift)
Englisch
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