Patent ID: 6980104

Claim:
A passenger aircraft with a security alarm system, comprising: a passenger aircraft fuselage; an aircraft electric power system installed in the fuselage; a bulkhead installed in the fuselage dividing the fuselage into a passenger cabin and a cockpit; at least one portable battery operated transmitter unit located in the passenger cabin and intended to be carried on the person of authorized personnel; each transmitter unit including a transmitter that can generate a signal in the form of a coded radio frequency pulse of short duration; each transmitter unit having a switch connected to the transmitter to activate the transmitter to generate said signal; an alarm assembly including a receiver unit and an alarm unit, said alarm assembly connected to the aircraft electric power system; said receiver unit installed in the passenger cabin and said alarm unit installed in the cockpit and connected by wire to the receiver unit; said receiver unit including a receiver for receipt of a coded signal from a transmitter for activation of the alarm unit; said alarm unit including one or more alarm devices activated by a pulse signal from the receiver unit received from a transmitter in the passenger cabin.