Means for adjusting the pressure of air-cooled condensation apparatus

Claim 1

AIR-COOLED CONDENSATION APPARATUS COMPRISING A MIXING CONDENSER HAVING AN INLET AND AN OUTLET, A LIQUID CIRCULATING PUMP HAVING AN INLET CONNECTED TO THE OUTLET OF THE MIXING CONDENSER AND HAVING AN OUTLET AND HAVING A PRESSURE STUB AT SAID PUMP OUTLET, A FIRST PRESSURE FEELER COUPLED TO SAID PRESSURE STUB SO AS TO BE RESPONSIVE TO PRESSURE CHANGES AT SAID PRESSURE STUB, A VERTICAL HEAT EXCHANGER HAVING A LOWER END AND AN UPPER END AND HAVING TUBING EXTENDING BETWEEN SAID ENDS, SAID TUBING HAVING AN INLET AND AN OUTLET AT THE LOWER END OF SAID HEAT EXCHANGER, SAID TUBING INLET CONNECTED TO THE OUTLET OF SAID PUMP, PRESSURE REDUCING MEANS HAVING AN INLET CONNECTED TO THE OUTLET OF SAID TUBING AND HAVING AN OUTLET CONNECTED TO THE INLET OF SAID MIXING CONDENSER, THE UPPER END OF SAID HEAT EXCHANGER BEING AT THE HIGHEST GEODETIC LEVEL OF THE APPARATUS, A SECOND PRESSURE FEELER COUPLED TO SAID PRESSURE REDUCING MEANS INLET SO AS TO BE RESPONSIVE TO PRESSURE CHANGES IN SAID PRESSURE REDUCING MEANS INLET, MEANS FOR VARYING THE SIZE OF SAID PRESSURE REDUCING MEANS INLET SO AS TO VARY THE PRESSURE THEREIN, AND MEANS COUPLING SAID PRESSURE FEELERS AND SAID SIZE VARYING MEANS AND OPERATIVE TO WEIGHT AND INTEGRATE THE PRESSURES FELT BY SAID PRESSURE FEELERS PROPORTIONALLY TO THE RESPECTIVE FLOW RESISTANCES BETWEEN SAID PRESSURE FEELERS AND THE HIGHEST GEODETIC LEVEL OF THE SYSTEM AND TO ACTUATE SAID SIZE VARYING MEANS TO VARY THE PRESSURE IN SAID PRESSURE REDUCING MEANS SO AS TO KEEP THE WEIGHTED SUM OF THE PRESSURES FELT BY SAID PRESSURE FEELERS CONSTANT.