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Application filed by Rft Messelektronik Dresden VebfiledCriticalRft Messelektronik Dresden Veb
Publication of SE7407752LpublicationCriticalpatent/SE7407752L/xx
Publication of SE392979BpublicationCriticalpatent/SE392979B/xx
G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
G08B17/00—Fire alarms; Alarms responsive to explosion
G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas