Liquid level gauging apparatus

Claim 1

APPARATUS FOR GAUGING THE LEVEL OF A LIQUID IN A CONTAINER COMPRISING MEANS TO BE WITHDRAWN FROM THE LIQUID AND HAVING A DESIGN REQUIRING A GREATER FORCE TO WITHDRAW IT FREE OF THE LIQUID THAN IS REQUIRED TO SUPPORT ITS DEAD WEIGHT, A NORMALLY TENSED FLEXIBLE ELEMENT CONNECTED TO SAID MEANS, LIFTING MEANS INCLUDING ROTARY MEANS ENGAGING SAID FLEXIBLE ELEMENT TO WITHDRAW SAID MEANS FROM THE LIQUID, MEANS MAINTAINING SAID FLEXIBLE MEANS UNDER SUFFICIENT TENSION TO MAINTAIN IT FREE OF SLACK, SAID LIFTING MEANS FURTHER COMPRISES A MOTOR HAVING A NORMALLY STATIONARY PART, MEANS YIELDABLY RESTRAINING SAID NORMALLY STATIONARY MOTOR PART AGAINST LIMITED MOVEMENT FROM A FIRST POSITION, SAID MOTOR PART HAVING INDICATOR CIRCUIT CONTROL MEANS MOUNTED THEREON NORMALLY OCCUPYING A FIRST INDICATING STATE, SAID NORMALLY STATIONARY MOTOR PART MOVING IN RESPONSE TO SAID GREATER WITHDRAWAL FORCE TO A SECOND POSITION THEREBY MOVING SAID INDICATOR CIRCUIT CONTROL MEANS TO A SECOND INDICATING STATE, SAID MOTOR PART BEING RETURNED INTERMEDIATE SAID FIRST AND SAID