Volumetric positive displacement flow meter

Claim 1

A FLOW METER CONSTRUCTION FOR ACCURATELY METERING LIQUID FLOW COMPRISING A HOUSING HAVING A PAIR OF OPPOSED END WALLS, A ROLLING SEAL DIAPHRAGM RETAINED PROXIMATE EACH OF SAID END WALLS AND SPACED THEREFROM, CHAMBERS DEFINED BETWEEN EACH OF SAID END WALLS AND THE DIAPHRAGM SPACED PROXIMATELY THEREFROM, A SINGLE ACTING PISTON FIXED TO EACH OF SAID DIAPHRAGMS, AN UNSUPPORTED CONNECTING ROD CONNECTING SAID PISTONS, A SINGLE PORT ASSOCIATED WITH EACH CHAMBER, INLET AND DISCHARGE TUBES COMMUNICATING WITH EACH PORT AND SEPARATE PRESSURE BIASED VALVE MEANS FOR CONTROLLING FLOW TO AND FROM SAID INLET AND DISCHARGE TUBES, AN INLET PIPE, EACH OF SAID INLET TUBES BEING POSITIONED ADJACENT SAID INLET PIPE, SAID VALVE MEANS INCLUDING AN INLET VALVE SEAT INTERPOSED BETWEEN EACH INLET TUBE AND SAID INLET PIPE, AN INLET VALVE MEMBER MOVABLE BETWEEN SAID INLET VALVE SEATS, AN ARMATURE ATTACHED TO SAID INLET VALVE MEMBER, A PAIR OF ELECTROMAGNETIC COILS, SAID ELECTROMAGMETIC COILS POSITIONED ADJACENT SAID ARMATURE FOR POSITIVELY DRAWING SAID ARMATURE BETWEEN TWO DISTINCT POSITIONS, EACH OF SAID DISTINCT POSITIONS CAUSING THE INLET VALVE MEMBER CARRIED BY THE ARMATURE TO PROPERLY REST IN AN INLET VALVE SEAT, A SOURCE OF ELECTRICAL ENERGY, SWITCH MEANS ELECTRICALLY INTERPOSED BETWEEN SAID SOURCE AND SAID ELECTROMAGNETIC COILS FOR ALTERNATIVELY CONNECTING SAID COILS TO SAID SOURCE, AND SNAPACTION CONTROL MEANS FOR OPERATING SAID SWITCH MEANS IN RESPONSE TO RECIPROCATION OF SAID CONNECTING ROD, SAID SNAP-ACTION CONTROL MEANS INCLUDING ADJUSTABLE ELEMENTS CARRIED BY SAID CONNECTING ROD, SAID CONNECTING ROD BEING SUBJECTED TO RECIPROCAL MOVEMENT DEPENDENT ON THE FLOW REQUIRED FROM SAID DISCHARGE PIPE.