Pressure rebalancing and measuring servosystem

Claim 1

APPARATUS RESPONSIVE TO VARIATIONS IN PRESSURE COMPRISING A TORSION BAR, A BAROMETRIC DEVICE MOVABLE IN RESPONSE TO PRESSURE CHANGES, SUPPORT MEANS CONNECTED TO SAID TORSION BAR, MEANS ROTATABLE ABOUT THE LONGITUDINAL AXIS OF SAID TORSION BAR, PICK-OFF MEANS HAVING A STATIONARY AND MOVABLE MEMBER PRODUCING A SIGNAL PROPORTIONAL TO THE ANGULAR MISALIGNMENT BETWEEN ITS MEMBERS, SAID MOVABLE MEMBER BEING CONNECTED TO SAID SUPPORT MEANS AND SAID MEANS ROTATABLE ABOUT THE LONGITUDINAL AXIS OF SAID TORSION BAR, MEANS RESPONSIVE TO TEMPERATURE CHANGES TO ROTATE SAID ROTATABLE MEANS RELATIVE TO SAID SUPPORT MEANS, MEANS MAINTAINED UNDER TENSION CONNECTING SAID BAROMETRIC DEVICE TO SAID SUPPORT MEANS APPLYING A TORQUE ABOUT THE LONGITUDINAL AXIS OF SAID TORSION BAR TO ROTATE SAID PICK-OFF MEANS MOVABLE MEMBER, SAID ROTATABLE MEANS, AND SAID SUPPORT MEANS ABOUT SAID TORSION BAR LONGITUDINAL AXIS WHEN SAID BAROMETRIC DEVICE MOVES, SAID MEANS UNDER TENSION BEING STIFF TO LONGITUDINAL FORCES AND RESILIENT TO BENDING FORCES, AND MEANS RESPONSIVE TO SAID PICK-OFF MEANS SIGNAL OPERABLE WITH SAID TORSION BAR TO APPLY A TORQUE TO THE BAR AND THEREBY CANCEL SUBSTANTIALLY ANY ANGULAR MISALIGNMENT BETWEEN THE PICK-OFF MEANS MEMBERS.