Detector assembly suited to smoke alarms

摘要

A detector assembly ( 10 ) powered by mains electricity and an elongate backup battery ( 76 ) is disclosed. The assembly includes: a ceiling mountable base ( 10 ) having a body defining a downwardly opening socket ( 24 ); a detector module ( 20 ) having a battery support portion ( 75 ) for holding the battery ( 76 ) in a vertical orientation, the module ( 20 ) receivable by the socket ( 24 ); a quick connection means for mechanically and electrically connecting the module ( 20 ) to the base ( 10 ); and shutter ( 50 ) mounted to the base ( 10 ). The shutter ( 50 ) prevents operation of the quick connection means when no vertical battery ( 76 ) is installed within the module ( 20 ). The quick connection means comprises co-operable pairs of conductors. The conductor pairs transmit power from the base ( 10 ) to the module ( 20 ). The pairs of conductors each comprise a stud conductor mounted to the base ( 10 ) and a forked conductor mounted to the module ( 20 ).