Automatic electric fluid heating system

Claim 1

AN AUTOMATIC HEATING SYSTEM FOR HEATING A FLUID ONLY WHEN THE FLUID IS FLOWING THROUGH THE SYSTEM COMPRISING, A FIRST AND SECOND CHAMBER ENCLOSED IN A PRESSURE HOUSING, A RESILIENT DIAPHRAGM SECURED TO THE HOUSING WALL AND SEPARATING THE CHAMBERS AT ALL TIMES, A HEATER COMPARTMENT WHERE THE FLUID MAY BE HEATED TO A DESIRED TEMPERATURE, A COIL OF RESISTANCE WIRE WITHIN SAID HEATER COMPARTMENT FOR HEATING THE FLUID, A FIRST CONDUIT FOR CONVEYING FLUID TO THE HEATER COMPARTMENT AND INCLUDING A BRANCH CONDUIT TO SAID FIRST CHAMBER, A SECOND CONDUIT FOR CONVEYING FLUID AWAY FROM THE HEATER COMPARTMENT AND INCLUDING A SECOND BRANCH CONDUIT TO SAID SECOND CHAMBER, A PERMANENT MAGNET SECURED TO SAID DIAPHRAGM AND ADAPTED TO BE MOVED WITH IT, A MAGNETICALLY OPERATED SWITCH ENCLOSED IN A SEALED ENVELOPE AND MOUNTED WITHIN ONE OF SAID CHAMBERS ADJACENT TO SAID MAGNET, SAID DIAPHRAGM AND MAGNET ADAPTED TO BE MOVED BY A DIFFERENCE IN PRESSURE BETWEEN SAID FIRST AND SECOND CONDUITS TO ACTUATE SAID SWITCH, A CIRCUIT BREAKER COUPLED BETWEEN SAID SWITCH AND SAID COIL OF RESISTANCE WIRE, AND A SOURCE OF ELECTRICAL POWER CONNECTED IN SERIES WITH THE CIRCUIT BREAKER AND SAID RESISTANCE WIRE FOR HEATING THE WIRE WHEN SAID SWITCH IS ACTUATED.