Novak gas plow control valve

Claim 1

A FUEL GAS FLOW CONTROL VALVE FOR A GAS BURNER ADAPTED TO OPERATE AT "HIGH" AND "INTERMEDIATE" AND "LOW" HEAT SETTINGS, SAID VALVE INCLUDING A BODY PORTION HAVING A GAS INLET PORT AND A GAS OUTLET PORT DIRECTIONALLY ALIGNED THROUGH SAID BODY, SAID BODY HAVING A CENTRAL BORE INTERCOMMUNICATING SAID INLET AND OUTLET PORTS, A PAIR OF GAS PASSAGEWAY GROOVES FORMED IN SAID BODY TO EXTEND FROM SAID OUTLET PORT IN OPPOSITE DIRECTIONS TO DIAMETRICALLY OPPOSED INTAKE POSITIONS AT THE CENTRAL BORE WALL INTERMEDIATELY OF SAID INLET AND OUTLET PORTS, A VALVE PLUG SLIPFITTED INTO SAID CENTRAL BORE AND BEING ROTATABLE WITHIN SAID BODY ABOUT AN AXIS TRANSVERSE TO THE DIRECTION OF ALIGNMENT OF SAID INLET AND OUTLET PORTS, SAID PLUG HAVING A TRANSVERSE BORE EXTENDING DIAMETRICALLY THERETHROUGH IN OPEN COMMUNICATING RELATION WITH SAID INLET AND OUTLET PORTS IN ONE POSITIONAL ADJUSTMENT OF SAID PLUG MEMBER, SAID PLUG HAVING AN AXIAL BORE INTERSECTING AND LEADING AWAY FROM SAID TRANSVERSE BORE, A DIAGONALBORE SEPARATE FROM SAID TRANSVERSE BORE LEADING INTO THE INTERIOR OF SAID PLUG FROM AN INLET OPENING ON THE PERIPHERY OF SAID PLUG ROTATABLE INTO REGISTRY WITH SAID INLET PORT WHEN SAID TRANSVERSE BORE IS IN OPEN COMMUNICATION WITH ONE OF SAID GROOVES AND OPENING AT ITS OTHER END INTO SAID AXIAL BORE WHEREBY PROVIDING A "LOW HEAT" GAS SUPPLY ORIFIC