Gas liquid detector

Claim 1

A GAS LIQUID DETECTOR COMPRISING A CHAMBER SERVING AS A VAPOR TRAP AND ADAPTED TO BE FILLED WITH A LIQUID, A VIBRATORY REED FORMED FROM MAGNETIC MATERIAL AND HAVING OPPOSITELY DISPOSED SURFACES, SAID REED MOUNTED IN SAID CHAMBER FOR VIBRATION ONLY IN DIRECTONS TRANSVERSE TO SAID SURFACES WHEREBY VIBRATION IS SUBSTANTIALLY PREVENTED BY THE RESISTANCE OF LIQUID IN SAID CHAMBER CONTACTING AT LEAST A PART OF SAID SURFACES OF SAID REED, AN ELECTROMAGNETIC DRIVING COIL EXTERNAL TO SAID CHAMBER, MEANS CAUSING SAID ELECTROMAGNETIC DRIVING COIL TO GENERATE A VIBRATORY MAGNETIC FIELD, SAID ELECTROMAGNETIC DRIVING COIL POSITIONED SO THE VIBRATORY MAGNETIC FIELD IS MAGNETICALLY COUPLED TO SAID REED AND EXERTS A VIBRATORY FORCE ON SAID REED INSIDE SAID CHAMBER CAUSING SAID REED TO A VIBRATE AT A USEFUL AMPLITUDE ONLY WHEN GAS IN THE LIQUID ENTERS THE CHAMBER AND FORCES THE LIQUID IN SAID CHAMBER SUBSTANTIALLY OUT OF CONTACT WITH SAID REED, AN ELECTROMAGNETIC PICKUP COIL EXTERNAL TO SAID CHAMBER, SAID PICKUP COIL BEING MAGNETICALLY COUPLED TO SAID REED BY THE MAGNETIC FIELD GENERATED FROM SAID ELECTROMAGNETIC DRIVING COIL, AND THE MAGNETIC FIELD GENERATED FROM SAID ELECTROMAGNETIC DRIVING COIL FORMING THE ONLY COUPLING BETWEEN SAID REED AND THE RESPECTIVE DRIVING COIL AND PICKUP COIL SO THAT THE VIBRATION OF SAID REED INDUCES VOLTAGES IN SAID PICKUP COIL WHEREBY AN INDICTION OF THE PRESENCE OF GAS IN THE LIQUID MAY BE OBTAINED.