Aircraft ejection seats

Claim 1

FOR AN AIRCRAFT EJECTION SEAT, RETRACTION MECHANISM FOR POSITIONING THE SEAT OCCUPANT FOR SEAT EJECTION, COMPRISING: (A) A HOLLOW SHAFT ADAPTED FOR ROTATABLE MOUNTING ON THE SEAT; (B) A SPINDLE WITHIN SAID SHAFT ADAPTED FOR FIXED MOUNTING ON THE SEAT; (C) A PAIR OF REELS SPACEDLY SECURED TO SAID SHAFT; (D) A STRAP ON EACH REEL FOR ATTACHMENT TO THE SEAT OCCUPANT; (E) A TORSION SPRING ENCIRCLING SAID SPINDLE WITHIN SAID SHAFT AND SECURED TO SAID SPINDLE AND TO SAID SHAFT FOR ROTATIVELY BIASING SAID SHAFT IN THE SENSE REQUIRED TO WIND SAID STRAPS ON TO SAID REELS; (F) A PINION SECURED TO SAID SHAFT; (G) A RACK ENGAGING SAID PINION TO ROTATE THE PINION, SAID SHAFT, AND SAID REELS UPON MOVEMENT OF SAID RACK; (H) A CYLINDER ADAPTED FOR MOUNTING ON THE SEAT, SAID CYLINDER HAVING AN AXIS; (I) A SOURCE OF PRESSURE FLUID COMMUNICATING WITH SAID CYLINDER; AND (J) A PISTON SLIDABLY RECEIVED IN SAID CYLINDER IN SEALING ENGAGEMENT THEREWITH FOR AXIAL MOVEMENT UNDER THE PRESSURE OF SAID FLUID, (1) SAID RACK BEING FIXEDLY FASTENED TO SAID PISTON FOR AXIAL MOVEMENT THEREWITH IN ENGAGEMENT WITH SAID PINION.