Patent ID: 8044825
Filing Date: 2011-10-25
Classification: B64D,G08B

Abstract:
1. An aircraft comprising a flight deck, a passenger cabin isolated from the flight deck by a bulkhead, and a passenger cabin security alert system for alerting authorized personnel (flight crew) in the flight deck to a problem in the passenger cabin, the system comprising a plurality of portable wireless transmitter units, each transmitter unit being suitable to be carried or worn on the person of authorized personnel (cabin crew) in the passenger cabin and being adapted to transmit a warning signal when actuated, and means arranged to receive a warning signal transmitted by a portable transmitter unit, determine the position in the cabin area of the portable transmitter unit that has been actuated and activate an alert unit in the flight deck for indicating the existence and position of the problem to authorized personnel (flight crew) in the flight deck, wherein the receiver means comprises a plurality of detector units including a master control module and at least one relay module, each detector unit being capable of detecting a warning signal transmitted by a portable transmitter unit, and control means responsive to detection of the warning signal by at least two detector units for determining the location of the portable transmitter unit within the cabin area.