Flowmeter with specific gravity compensator

Claim 1

A FLOW-INDICATING DEVICE COMPRISING A SECTION OF CONDUIT THROUGH WHICH A FLUID FLOWS, AN IMPULSE GENERATOR OUTSIDE OF THE CONDUIT AND IN POSITION TO IMPART A MAGNETIC FIELD ACROSS AT LEAST A PART OF THE CROSS SECTION OF THE CONDUIT, A ROTOR HAVING A POLE THEREON AND SUPPORTED BY THE CONDUIT IN SAID MAGNETIC FIELD AND IN TEH PATH OF THE FLUID, THE IMPULSE GENERATOR PRODUCING SIGNAL IMPULSES AT A FREQUENCY RESPONSIVE TO THE ROTATIVE SPEED OF THE POLE OF THE ROTOR, AN ELECTRONIC CIRCUIT INDICATING DEVICE RESPONSIVE TO THE IMPULSES, A CONTROL ADJUSTMENT FOR THE ELECTRONIC CIRCUIT INDICATING DEVICE INCLUDING AN ELEMENT IN THE CIRCUIT ADJUSTABLE TO CHANGE A CHARACTERISTIC OF THE IMPULSES, AND MEANS FOR OPERATING THE CONTROL ADJUSTMENT INCLUDING A HOUSING IN COMMUNICATION WITH THE CONDUIT AND CONTAINING FLUID FROM THE CONDUIT, A FLOAT LOCATED IN THE FLUID IN SAID HOUSING AND RESILIENT MEANS URGING THE FLOAT DOWNWARD IN THE FLUID, SAID RESILIENT MEANS YIELDING IN RESPONSE TO UPWARD MOVEMENT OF THE FLOAT BY THE GREATER BUOYANCY OF LIQUIDS OF HIGHER SPECIFIC GRAVITY ENTERING THE HOUSING FROM THE CONDUIT.