Automatic rebalancing measuring system having auxiliary actuated indicator zero return means

Claim 1

IN A CONDITION MEASURING AND INDICATING SYSTEM INCLUDING INDICATOR MEANS HAVING AN INDICATOR MEMBER MOVABLE RELATIVE TO A ZERO POSITION, AND CONDITION MEASURING MEANS OF ELECTRICAL NETWORK CHARACTER CONNECTED TO SAID INDICATOR MEMBER AND OPERABLE RESPONSIVELY TO A CONDITION UNDER MEASUREMENT IN APPLICATION THERETO FOR MOVING SAID MEMBER TO A POSITION INDICATING THE VALUE OF THE CONDITION UNDER MEASUREMENT, SAID CONDITION MEASURING MEANS BEING OPERABLE IN RESPONSE TO REMOVAL OF THE CONDITION UNDER MEASUREMENT THEREFROM TO RETURN SAID INDICATOR MEMBER TO ZERO POSITION AND BEING SUBJECT TO ELECTRICAL ERROR OFF-BALANCE RESULTING IN INDICATOR RETURN TO AN OFFZERO POSITION; THE COMBINATION THEREWITH OF ADJUSTABLE ERROR OFF-BALANCE COMPENSATING CONTROL MEANS FOR SAID CONDITION MEASURING MEANS EFFECTIVE THROUGH ADJUSTMENT THEREOF TO DETERMINE THE TERMINAL EXTENT OF OPERATION OF SAID CONDITION MEASURING MEANS IN RETURNING THE INDICATOR MEMBER TO ZERO POSITION, SUCH AS TO EFFECT LOCATION OF THE INDICATOR MEMBER IN TRUE ZERO POSITION, AND MEANS CONTROLLED BY SAID INDICATOR MEMBER AND OPERABLE FOR EFFECTING ADJUSTMENT OF SAID CONTROL MEANS ONLY WHEN THE INDICATOR MEMBER IS IN A PREDETERMINED OFF-ZERO RANGE.