Patent ID: 7207524

Claim:
Apparatus for warning of differential pressure during opening of a pressure-loaded closure device ( 1 ) of an opening in an aircraft fuselage by an opening mechanism ( 4 ; 100 , 105 ) including a control lever ( 4 ; 208 ) and a flap ( 4 A) that covers the control lever, characterized in that an air guide passage ( 6 ; 206 , 207 ) is provided from a first side with higher pressure (P) to a second side with lower pressure (A), wherein the air guide passage is closeable by a valve ( 5 ; 209 ), and the valve ( 5 ; 209 ) is operatively connected with and controlled by the flap so that the valve is opened upon operation of the flap, and the apparatus produces an acoustic signal upon opening of the valve ( 5 ; 209 ) when a differential pressure exists between the first and second sides.