Temperature compensator and measuring instrument incorporating the same

Claim 1

IN A MEASURING APPARATUS FOR PROVIDING A REPRESENTATION OF A VARIABLE QUANTITY, MEANS RESPONSIVE TO SAID VARIABLE QUANTITY FOR PROVIDING AN OUTPUT REPRESENTATIVE THEREOF AND WHICH IS CHARACTERIZED BY BEING SUBJECT TO ERRORS OF A FIRST KIND PROPORTIONAL TO AMBIENT TEMPERATURE AND BY BEING SUBJECT TO ERRORS OF A SECOND KIND PROPORTIONAL TO BOTH AMBIENT TEMPERATURE AND A SECOND VARIABLE, OUTPUT MEANS RESPONSIVE TO SAID VARIABLE-QUANTITY-RESPONSIVE MEANS FOR PROVIDING A REPRESENTATION OF SAID VARIABLE QUANTITY, SAID OUTPUT MEANS INCLUDING A MOVABLE INPUT MEMBER, A ROTATABLE ELEMENT MOUNTED FOR ROTATION ABOUT AN AXIS THROUGH AN ARC REPRESENTATIVE OF THE OUTPUT OF SAID VARIABLE-QUANTITY-RESPONSIVE MEANS, AN ARCUATE BIMETALLIC MEMBER REMOVABLY CONNECTED ADJACENT TO ONE END THEREOF TO SAID ELEMENT AND ROTATABLE THEREWITH ABOUT SAID AXIS, AN ELONGATED LINK, MEANS CONNECTING SAID LINK TO SAID INPUT MEMBER AND MOVABLE LONGITUDINALLY ALONG SAID LINK FOR ADJUSTING THE EFFECTIVE LENGTH THEREOF, AND MEANS CONNECTING SAID LINK TO SAID BIMETALLIC MEMBER AND MOVABLE ALONG THE LATTER FOR SELECTIVELY ADJUSTING THE EFFECTIVE LENGTH OF SAID BIMETALLIC MEMBER INCLUDED BETWEEN SAID ROTATABLE ELEMENT AND SAID LINK, SAID BIMETALLIC MEMBER BEING MOUNTED TO ROTATE SAID LINK ABOUT SAID AXIS IN RESPONSE TO A GIVEN CHANGE IN AMBIENT TEMPERATURE IN THE DIRECTION OPPOSITE TO THAT IN WHICH SAID ELEMENT IS ROTATED IN RESPONSE TO SAID CHANGE IN AMBIENT TEMPERATURE, WHEREBY ERRORS OF SAID FIRST AND SECOND KIND ARE SUBSTANTIALLY ELIMINATED.