Presented is a burglar alarm system for installation in residential, commercial or industrial premises. The burglar alarm system incorporates photographic equipment which photographs the intruder and a pneumatically operated audible alarm....http://www.google.fr/patents/US4522146?utm_source=gb-gplus-shareBrevet US4522146 - Burglar alarm system incorporating pneumatically operated components
Burglar alarm system incorporating pneumatically operated components
