Mercury distillation apparatus with electric heat control

Claim 1

MERCURY DISTILLATION APPARATUS, COMPRISING (A) A MERCURY SUPPLY RESERVIOR, (B) A PLURALITY OF DISTILLING UNITS EACH HAVING A BOILER AND A CONDENSER, (C) OUTFEED MEANS COMMUNICATING THE SUPPLY RESERVOIR WITH THE FIRST BOILER, (D) CONDUIT MEANS COMMUNICATING EACH CONDENSER WITH THE NEXT SUCEEDING BOILER, (E) A DISTILLATE CONTAINER, (F) CONDUIT MEANS COMMUNICATING THE LAST CONDENSER WITH THE DISTILLATE CONTAINER, (G) CONDUIT MEANS COMMUNICATING THE DISTILLATE CONTAINER AND DISTILLING UNITS WITH A SOURCE OF VACUUM, (H) AN ELECTRIC HEATER ASSOCIATED WITH EACH BOILER AND HAVING AN ELECTRIC CIRCUIT, AND (I) ELECTRIC CONTROL MEANS IN THE ELECTRIC CIRCUIT OF EACH HEATER, EACH CONROL MEANS HAVING AN ELECTRIC CIRCUIT, (J) A PAIR OF VERTICALLY SPACED ELECTRICAL CONTACT MEANS ASSOCIATED WITH EACH BOILER AND ARRANGED IN THE ELECTRIC CIRCUIT OF THE CONTROL MEANS FOR THE HEATER OF SAID BOILER, SAID CONTACT MEANS BEING OPERABLE UPON THE ATTAINMENT OF A PREDETERMINED MINIMUM LEVEL OF MERCURY IN THE BOILER TO BE INTERCONNECTED ELECTRICALLY BY THE MERCURY IN THE BOILER, WHEREBY TO OPERATE THE HEATER CONTROL MEANS TO ACTIVATE THE HEATER OF SAID BOILER, AND (K) A PAIR OF VERTICALLY SPACED ELECTRICAL CONTACT MEANS IN EACH BOILER SUCCEEDING THE FIRST AND ARRANGED IN THE ELECTRIC CIRCUIT OF THE CONTROL MEANS FOR THE HEATER OF THE NEXT PRECEDING BOILER, SAID CONTACT MEANS BEING OPERABLE UPON THE ATTAINMENT OF A PREDETERMINED MAXIMUM LEVEL OF MERCURY IN THE BOILER TO BE INTERCONNECTED ELECTRICALLY BY THE MERCURY IN THE BOILER, WHEREBY TO OPERATE THE HEATER CONTROL MEANS TO INACTIVATE THE HEATER TO THE NEXT PRECEDING BOILER.