Vibration-proof weighing scale with flexure pivots

Claim 1

A WEIGHING SCALE HAVING A SUBSTANTIALLY EQUAL MASS MOMENT SYSTEM, COMPRISING (A) A FRAME, (B) A FIRST MOVABLE WEIGHING ELEMENT, INCLUDING A LOAD RECEIVING MEMBER ADAPTED TO RECEIVE A QUANTITY OF A PRODUCT TO BE WEIGHED AND HAVING A PREDETERMINED MASS, (C) A SECOND MOVABLE WEIGHING ELEMENT HAVING A PREDETERMINED MASS, (D) A SUBSTANTIALLY VERTICAL FLEXIBLE MEMBER CONNECTING SAID FIRST WEIGHING ELEMENT TO SAID SECOND WEIGHING ELEMENT, (E) GUIDE MEANS ASSOCIATED WITH SAID FIRST WEIGHING ELEMENT TO INSURE MOVEMENT THEREOF IN A SUBSTANTIALLY VERTICAL PATH DURING THE WEIGHHING OPERATION, (F) A PIVOT SYSTEM HAVING A PIVOT AXIS THEREOF FIXED, (1) A PART OF SAID PIVOT SYSTEM BEING SUPPORTED BY SAID FRAME, AND (2) ANOTHER PART THEREOF BEING MOUNTED ON SAID SECOND WEIGHING ELEMENT, (G) SPRING MEANS ACTING UPON SAID WEIGHING ELEMENTS TO CONTROL THE MOVEMENT THEREOF WHEN WEIGHT IS ADDED TO SAID LOAD RECEIVING MEMBER, THE TORQUE OF SAID SPRING MEANS BEING SUBSTANTIALLY ZERO AT THE TIME THE QUANTITY OF PRODUCT TO BE WEIGHED IS ON SAID LOAD RECEIVING MEMBER, (H) THE MASS OF SAID FIRST WEIGHTING ELEMENT TOGETHER WITH THE PRODUCT THEREON BEING WEIGHED, ACTING THROUGH SAID FLEXIBLE MEMBER, MULTIPLED BY THE DISTANCE FROM SAID FLEXIBLE MEMBER TO SAID FIXED PIVOT AXIS, AND THE MASS MOMENT OF SAID SECOND WEIGHING ELEMENT BEING SUBSTANTIALLY EQUAL IN A HORIZONTAL PLANE THROUGH SAID FIXED PIVOT AXIS, WHEREBY A SUBSTANTIALLY BALANCED MASS MOMENT SYSTEM IN SAID HORIZONTAL PLANE IS ACHIEVED.