Supinating pilot's seat

Claim 1

IN AN AIRCRAFT CAPSULE STRUCTURE: A PILOT''S SEAT HAVING A BACK PORTION PIVOTALLY CONNECTED TO A SEAT PORTION, PNEUMATIC ACTUATOR MEANS INCLUDING PISTON MEANS CONNECTED TO SAID BACK PORTION FOR ACTUATING SAID POLOT''S SEAT TO AND FROM A SUPINATING POSITION, FIRST AND SECOND VALVE MEANS DISPOSED RESPECTIVELY AT EACH END OF SAID PNEUMATIC ACTUATOR MEANS, AIR SUPPLY MEANS, ROTARY VALVE MEANS INCLUDING A ROTATABLE ELEMENT HAVING FIRST POSITION FOR CONNECTING SAID AIR SUPPLY MEANS TO SAID FIRST VALVE MEANS AND A SECOND POSITION FOR CONNECTING SAID AIR SUPPLY MEANS TO SAID SECOND VALVE MEANS, CONTROL MEANS INCLUDING ARM MEANS HAVING A MASS AT ONE END, SAID ARM MEANS OPERABLY CONNECTED TO SAID ROTATABLE ELEMENT WHEREBY SAID ROTATABLE ELEMENT IS ROTATABLE TO SAID FIRST POSITION WHEN THE ACCELERATION FORCES ACTING ON SID MASS ARE ABOVE A PREDETERMINED VALUE AND TO SAID SECOND POSITION WHEN THE ACCELERATION FORCES ACTING ON SAID MASS ARE BELOW PREDETERMINED VALUE.