An arrangement for testing an alarm system, requiring only a single individual. The alarm system itself includes an alarm activation circuit, a main alarm, for example an audio alarm, and a plurality of remote sensors all connected together such that activation of at least one of the remote sensors activates...http://www.google.co.uk/patents/US4032909?utm_source=gb-gplus-sharePatent US4032909 - Arrangement for testing an alarm system and method
