Roylance, Abrams, Berdo & Goodman
Deployment sequencer
 A parachute deployment sequencer includes two sequencer systems in electromagnetic shielding housings. Each housing contains two bellows connected to pitot tubes, a third bellows for measuring ambient pressure and three switch contact sets connected in series, each contact set being operated by one of the bellows. Each housing also contains a battery actuated by seat ejection and a deployment firing circuit with a series switch circuit in between. After ejection, deployment is initiated when all three switches are closed. 
Stencel Aero Engineering Corporation
B B
B64D B64D
inventional inventional
James W.
Duncan