Means for dynamic analysis of unbalance

Claim 1

DEVICE FOR MEASURING UNBALANCE OF A SPECIMEN IN A GIVEN REFERENCE PLANE AND ABOUT A DESIRED GRAVITY AXIS OF THE SPECIMENT, COMPRISING MOUNTING MEANS FOR COAXIALLY HOLDING THE SPECIMENT, SAID MOUNTING MEANS BEING RECIPROCABLE IN A GIVEN DIRECTION OTHER THAN A ROTARY DIRECTION ABOUT SAID AXIS, AN OSCILLATION GENERATOR CONNECTED WITH SAID MOUNTING MEANS FOR IMPARTING THERETO OSCILLATIONS IN SAID GIVEN DIRECTION WHEREBY THE SPECIMEN, ASIDE FROM SAID IMPARTED OSCILLATIONS, IS SUBJECTED TO ROTARY OSCILLATIONS ABOUT A POINT ON SAID AXIS IF THE SPECIMEN IS UNBALANCED, AND OSCILLATION SENSING MEANS RESPONSIVE TO SAID ROTARY OSCILLATIONS TO PROVIDE A MAGNITUDE INDICATIVE OF THE UNBALANCE OF THE SPECIMEN, SAID MOUNTING MEANS COMPRISING A RIGID FRAME STRUCTURE HAVING BEARING MEANS FOR JOURNALLING THE SPECIMEN FOR ROTATION ABOUT SAID AXIS, SAID FRAME STRUCTURE BEING PENDULOUSLY RECIPROCABLE ABOUT A FULCRUM TRANSVERSE TO SAID AXIS, SAID OSCILLATION GENERATOR BEING CONNECTED WITH SAID FRAME STRUCTURE FOR EXCITING IT TO PENDULOUS OSCILLATION ABOUT SAID FULCRUM, AND SAID SENSING MEANS BEING RESPONSIVE TO ROTARY OSCILLATION OF THE SPECIMEN ABOUT SAID AXIS, A SUPPORT PIVOTALLY ENGAGING SAID FRAME STRUCTURE TO DEFINE SAID FULCRUM, SAID SUPPORT BEING DISPLACEABLE ALONG SAID FRAME STRUCTURE FOR SHIFTING SAID FULCRUM ALONG SAID AXIS OF ROTATION.