Means for the controlled dispensing of draft beer

Claim 1

MEANS FOR CONTROLLED DISPENSING OF DRAFT BEER SUBJECT TO FOAM PRODUCING CHARACTERISTICS AS IT IS DISPENSED COMPRISING A FAUCET HAVING AN AXIAL BORE THERETHROUGH, A DISCHARGE SPOUT AT ITS LOWER END, A BEER SUPPLY PASSAGE COMMUNICATING WITH SAID BORE INTERMEDIATE ITS EXTENT, A VALVE SEAT IN SAID BORE, A CYLINDER HAVING A PISTON THEREIN AND A PISTON ROD PROJECTING FROM ONE END THEREOF, SAID END OF SAID CYLINDER FORMING A CLOSURE FOR THE OPPOSITE END OF SAID BORE TO CAUSE SAID PISTON ROD TO PROJECT THEREWITHIN CONCENTRICALLY ALIGNED WITH SAID SPOUT, A VALVE ELEMENT ON THE END OF SAID PISTON ROD ENGAGEABLE WITH SAID VALVE SEAT, SPRING MEANS NORMALLY URGING SAID ROD TOWARDS SAID VALVE SEAT NORMALLY TO INTERRUPT COMMUNICATION BETWEEN SAID SPOUT AND SAID BORE, AIR PRESSURE SUPPLY MEANS COMMUNICATING WITH SAID CYLINDER FOR MOVING SAID PISTON WHEREBY TO LIFT SAID VALVE ELEMENT OFF SAID SEAT, A SWITCH ON SAID FAUCET ENGAGEABLE BY A RIM OF A GLASS TO BE FILLED, WHEN SURROUNDING SAID SPOUT, A CIRCUIT CONNECTED WITH SAID SWITCH, MEANS IN SAID CIRCUIT CONTROLLING AN AIR PRESSURE SUPPLY TO SAID CYLINDER, AND CONTROL MEANS IN SAID CIRCUIT INITIATED BY MOMENTARY CONTACT OF SAID SWITCH FOR MAINTAINING SAID VALVE OPEN OVER A TIME PERIOD REQUIRED FOR FILLING SAID GLASS TO A PREDETERMINED LEVEL WHEREBY THE USER MAY RETRACT THE GLASS FROM SAID FAUCET TO DESIRED EXTENT DURING SAID TIME PERIOD AS TO INCREASE OR DECREASE THE AMOUNT OF FOAM PRODUCED WHEN SAID GLASS IS FILLED.