Liquid level control apparatus

Claim 1

A FLUID LEVEL CONTROL APPARATUS FOR USE WITH A CONTAINER OF ELECTRICALLY CONDUCTIVE FLUID, COMPRISING: VALVE MEANS OPERABLE TO FEED FLUID INTO SAID CONTAINER; AND MEANS FOR SENSING THE LEVEL OF SAID FLUID INCLUDING, ELECTRODE MEANS HAVING AT LEAST ONE ELECTRODE NORMALLY IN CONTACT WITH THE FLUID, FIRST SWITHCH MEANS FOR CONTROLLING THE OPERATION OF SAID VALVE MEANS, SECOND SWITCH MEANS FOR CONTROLLING THE ENERGIZATION OF SAID ELECTRODE MEANS, ELECTROMAGNETIC MEANS RESPONSIVE TO A LOSS OF CONTACT BETWEEN THE FLUID IN SAID CONTAINER AND SAID ONE ELECTRODE MEANS, FOR CLOSING SAID FIRST SWITCH MEANS TO OPERATE SAID VALVE MEANS TO FEED FLUID TO SAID CONTAINER, AND OPENING SAID SECOND SWITCH MEANS TO DE-ENERGIZE SAID ONE ELECTRODE; AND MEANS FOR SHUNTING OUT SAID ELECTROMAGNETIC MEANS WHEN THE LEVEL OF FLUID IN THE CONTAINER RISES TO A PREDETERMINED LEVEL FOR THEREUPON OPENING SAID FIRST SWITCH MEANS SAID SECOND SWITCH MEANS.