Densitometer

Claim 1

AN ELECTROMECHANICAL DENSITOMETER FOR MEASURING THE DENSITY OF A PRESSURIZED CRYOGENIC FLUID FLOWING IN A PIPE COMPRISING: A SUBSTANTIALLY RIGID CHAMBER, A FLUID CONDUIT WITHIN SAID CHAMBER FOR RECEIVING THE PRESSURIZED CRYOGENIC FLUID FROM THE PIPE, A PAIR OF SPACED BELLOWS, EACH HAVING ONE END CONNECTED TO SAID CONDUIT AND THE OPPOSITE END CONNECTED TO SAID CHAMBER, MEANS FOR PRESSURIZING SAID CHAMBER TO THE PRESSURE OF THE FLOWING CRYOGENIC FLUID TO ELIMINATE PRESSURE SENSITIVITY OF SAID BELLOWS, A VACUUM JACKET SURROUNDING SAID CHAMBER FOR THERMALLY INSULATING THE SAME, A PAIR OF COUPLINGS SECURED TO THE PIPE CONTAINING THE CRYOGENIC FLUID AT SPACED POINTS ON OPPOSITE SIDES OF SAID CHAMBER, A TRANSFER LINE SECURED TO EACH OF SAID COUPLINGS EXTENDING INTO SAID VACUUM JACKET TO SAID CHAMBER, EACH OF SAID TRANSFER LINES COMPRISING, AN OUTER CASING HAVING ONE END RIGIDLY SECURED TO ONE OF SAID COUPLINGS AND THE OTHER END SECURED TO SAID CHAMBER, AND AN INNER CASING HAVING ONE END RIGIDLY SECURED TO SAID COUPLING AND THE OTHER END SECURED TO SAID CHAMBER, A MECHANICAL OSCILLATOR FOR GENERATING A SINUSOIDAL MOTION, MEANS FOR CONNECTING SAID OSCILLATOR TO SAID CONDUIT FOR VIBRATING THE SAME IN SAID CHAMBER TRANSVERSELY IN A SINGLE PLANE AT A CONTROLLED AMPLITUDE AND FREQUENCY, A DYNAMOMETER FOR SENSING THE FORCE EXERTED BY THE VIBRATING CONDUIT AND CRYOGENIC FLUID FLOWING THEREIN AND GENERATING AN ELECTRICAL SIGNAL IN PHASE WITH SAID VIBRATING CONDUIT, SAID SIGNAL BEING PROPORTIONAL TO THE MAXIMUM FORCE EXERTED BY SAID CONDUIT, AND MEANS FOR MONITORING SAID ELECTRICAL SIGNAL.