Pyrotechnic roll reference gyro

Claim 1

IN IMPROVED ROLL REFERENCE GYRO OF THE PYROTECHNICPOWERED TYPE COMPRISING: A RELATIVELY STATIONARY GYRO FRAME, AT LEAST ONE GIMBAL ASSEMBLY PIVOTABLY MOUNTED TO SAID GYRO FRAME, SAID GIMBAL ASSEMBLY INCLUDING A FIXEDLY-MOUNTED NOZZLE, SAID GYRO FRAME MEMBER INCLUDING AN AXIALLY ALIGNED BORE TERMINATING AT ITS INNER END WITH A COUNTERBORE FORMING A SHARP EDGE THEREBETWEEN A HOLLOW NOZZLE-PLUNGER MOUNTED FOR RECIPROCATION IN SAID BORE FOR MOVEMENT INTO SAID NOZZLE, SAID NOZZLE PLUNGER INCLUDING AN ENLARGED PORTION AT ITS INNER END, AN ANNULAR TAPERED SEATING SURFACE ON SAID ENLARGED PORTION OF SAID NOZZLE-PLUNGER ADJACENT SAID SHARP EDGE, SAID GIMBAL ASSEMBLY FURTHER INCLUDING A ROTOR ASSOCIATED WITH SAID NOZZLE PROVIDED ON ITS PERIPHERY WITH VANES ADAPTED TO RECEIVE A BLAST OF FLUID TO EFFECT ROTATION THEREOF, AND MEANS EFFECTIVE DURING THE DELIVERY OF PRESSURIZED FLUID TO SAID ROTOR FOR CAUSING SAID TAPERED SEATING SURFACE OF SAID NOZZLE-PLUNGER TO MOVER INTO SAID COUNTERBORE AND TO EFFECT A SEAL WITH SAID SHARP EDGE WHEREBY SAID SEAL WILL NOT BE BROKEN IN THE EVENT OF AXIAL MISALIGNMENT BETWEEN SAID NOZZLE-PLUNGER AND SAID NOZZLE.