Dry cleaning apparatus

Claim 1

FOR USE IN DRY CLEANING APPARATUS INCLUDING A RECEPTACLE FOR CLOTHES AND A CIRCUIT FOR RECIRCULATING DRY CLEANING SOLVENT THROUGH SAID RECEPTACLE, SOLVENT RECOVERY AND CONTROL APPARATUS IN SAID CIRCUIT COMPRISING: A VERTICALLY EXTENDING CONTAINER WITH AN INLET ADJACENT ITS UPPER END FOR RECEIVING SOLVENT FROM SAID RECEPTACLE AND A BOTTOM OUTLET FOR RETURNING SOLVENT TO SAID RECEPTACLE, MEANS IN SAID CONTAINER FORMING A TRAP FOR RETAINING LIQUID AT A LEVEL BETWEEN SAID OUTLET AND SAID INLET, MEANS FORMING A CONTROL CHAMBER BELOW SAID TRAP, MEANS FOR CONDUCTING EXCESS LIQUID FROM SAID TRAP INTO SAID CONTROL CHAMBER, MEANS FORMING A RESTRICTED PASSAGE CONNECTING THE BOTTOM OF SAID CONTROL CHAMBER TO SAID OUTLET WHEREBY SAID LIQUID ENTERING THE CONTROL CHAMBER FROM SAID TRAP PASSES TO SAID OULET THROUGH SAID RESTRICTED PASSAGE THUS PROVIDING A VARIABLE LIQUID LEVEL IN SAID CONTROL CHAMBER, THE LIQUID IN SAID CONTROL CHAMBER EXERTING PRESSURE ON THE GAS ABOVE SAID LIQUID, SAID PRESSURE BEING DEPENDENT ON THE RELATIVE RATE OF FLOW OF LIQUID INTO AND OUT OF SAID CHAMBER, AND MEANS RESPONSIVE TO THE PRESSURE IN SAID CONTROL CHAMBER FOR GENERATING A SIGNAL TO MODIFY THE OPERATION OF SAID DRY CLEANING APPARATUS.