Flotation apparatus and electrical control therefor

Claim 1

FLOTATION APPARATUS FOR SUSPENDING AN OBJECT IN A BODY OF WATER WHICH COMPRISES (A) A HOUSING HAVING AN OPENING COMMUNICATING WITH THE BODY OF WATER, (B) AN EXPANSIBLE CONTAINER SECURED WITHIN THE HOUSING, (C) A GAS SOURCE HAVING AN INLET CONDUIT COMMUNICATING WITH THE EXPANSIBLE CONTAINER, (D) A GAS OUTLET CONDUIT COMMUNICATING BETWEEN THE EXPANSIBLE CONTAINER AND THE BODY OF WATER, (E) MEANS FOR CONTROLLING THE VOLUME OF GAS IN THE EXPANSIBLE CONTAINER WHICH COMPRISES, (F) A FIRST ELECTRICALLY OPERATED VALVE IN THE INLET CONDUIT AND A FIRST SWITCH MEANS THEREFOR, (G) A SECOND ELECTRICALLY OPERATED VALVE IN THE OUTLET CONDUIT AND A SECOND SWITCH MEANS THEREFOR, (H) A SOUCE OF ELECTRICAL ENERGY AND A TWO POSITION SWITCH CONNECTED THEREWITH AND (I) SAID TWO POSITION SWITCH BEAING OPERABLE IN ONE POSITION TO MAKE CIRCUIT WITH SAID FIRST SWITCH FOR REGULATING THE SUPPLY OF GAS TO SAID CONTAINER AND SAID TWO POSITION SWITCH HEING OPERABLE IN ITS OTHER POSITION TO MAKE CIRCUIT WITH SAID SECOND SWITCH TO REGULATE THE REMOVAL OF GAS FROM THE CONTAINER WHEREBY THE VOLUME OF WATER IN THE CONTAINER MAY BE VARIED FOR CHANGING THE DEPTH OF THE OBJECT IN THE BODY OF WATER.