Apparatus for detecting surface break

Claim 1

APPARATUS FOR USE IN GAUGING LIQUID CONFINED IN A CONTAINER COMPRISING A UNITARY FLOAT HAVING A DESIGN TO REQUIRE A GREATER FORCE TO WITHDRAW IT FROM THE LIQUID THAN REQUIRED TO SUPPORT ITS DEAD WEIGHT, SENSING MEANS MOUNTED FOR MOVEMENT BETWEEN A FIRST POSITION AND A SECOND POSITION, SAID SENSING MEANS MOVING TO SAID SECOND POSITION DURING WITHDRAWAL OF SAID FLOAT AND BACK TO SAID FIRST POSITION UPON COMPLETE WITHDRAWAL OF SAID FLOAT, BIAS MEANS TO URGE SAID SENSING MEANS TO SAID FIRST POSITION, A NORMALLY TENSED FLEXIBLE ELEMENT CONNECTED AT ONE END DIRECTLY TO SAID UNITARY FLOAT AND ENGAGING SAID SENSING MEANS IN OPPOSITION TO SAID BIAS MEANS AND TAKE-UP MEANS FOR SAID FLEXIBLE ELEMENT SAID SENSING MEANS BEING MOVED TO SAID SECOND POSITION BY THE APPLICATION OF ADDITIONAL TENSION INTO SAID FLEXIBLE ELEMENT BY SAID GREATER FORCE.