Vapor pressure measuring apparatus

Claim 1

AN APPARATUS FOR MEASURING FLUCTUATIONS IN THE VAPOR PRESSURE OF A LIQUID WHICH COMPRISES A VAPORIZING CHAMBER HAVING A DRAIN MEANS AND AN INLET MEANS COMPRISING A NOZZLE TO SUBSTANTIALLY COMPLETELY ATOMIZE LIQUID INTRODUCED TO SAID VAPORIZING CHAMBER, TWO PRESSURES LINES LEADING FROM A POINT IN SAID VAPORIZING CHAMBER IN CONTACT WITH THE VAPOR PHASE TO OPPOSITE SIDES OF A BELLOWS IN A PRESSURE SENSING CHAMBER, SAID PRESSURE SENSING CHAMBER COMPRISING TWO FLUID TIGHT COMPARTMENTS SEPARATED BY SAID BELLOWS, SAID BELLOWS BEING MOVABLE IN RESPONSE TO CHANGES IN PRESSURE IN EITHER OF SAID COMPARTMENTS AND BEING CONNECTED TO MEANS FOR MEASURING SAID BELLOWS MOVEMENT, ONE OF SAID FLUID PRESSURE LINES HAVING A VALVE FOR MAINTAINING IN ONE OF SAID COMPARTMENTS A REFERENCE PRESSURE DERIVED FROM SAID VAPORIZING CHAMBER AND INDEPENDENT OF LATER CHANGES OF PRESSURE IN SAID VAPORIZING CHAMBER.