Whittaker Corporation

Systron Donner

Wayne R Hay

Electrical circuitry associated with a pneumatic pressure detector for use in an overheat condition or fire alarm system for aircraft. The pressure detector comprises a plenum situated between a pair of deformable diaphragms and pressurized by a capillary type sensor containing an absorbed gas. A control electronics stage is located remotely from the pressure detector stage and is connected thereto by a single wire extending between them. The control electronics stage senses integrity failure of the pressure detector, an overheat or fire condition, and a ground fault in the connection between the two stages and provides corresponding output indications. The circuitry also includes ground connections at the control electronics stage and the pressure detector, respectively.

Pneumatic pressure detector for fire and ground fault detection

An accelerometer based power control apparatus for use in an aircraft subsystem (where the subsystem may be a fire extinguishing system) utilizes an independent battery source. The battery is connected to the aircraft subsystem only during the flight of the aircraft by a positive indication of an associated accelerometer which closes a switch connecting the battery to the aircraft subsystem.

Growing community of inventors

Pleasant Hill, CA, United States of America

Wayne R Hay