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D'ETUDES RECHERCHES ET CONSTRUCTIONS ELECTRONIQUES Ste
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D'ETUDES RECHERCHES ET CONSTRUCTIONS ELECTRONIQUES Ste
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Application filed by D'ETUDES RECHERCHES ET CONSTRUCTIONS ELECTRONIQUES StefiledCriticalD'ETUDES RECHERCHES ET CONSTRUCTIONS ELECTRONIQUES Ste
Priority to FR47383ApriorityCriticalpatent/FR1472226A/fr
Application grantedgrantedCritical
Publication of FR1472226ApublicationCriticalpatent/FR1472226A/fr
G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
G08B13/00—Burglar, theft or intruder alarms
G08B13/16—Actuation by interference with mechanical vibrations in air or other fluid
G08B13/1654—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems
G08B13/1663—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems using seismic sensing means
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Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
FR47383A1966-01-271966-01-27Perfectionnements aux systèmes d'alarme
ExpiredFR1472226A
(fr)