Dimension measuring arrangement

Claim 1

THE METHOD OF MEASURING THE DIAMETER OF AN OBJECT HAVING AN ARCUATE SURFACE AND A CIRCULAR CROSS-SECTION FORMED BY SAID ARCUATE SURFACE, COMPRISING THE STEPS OF POSITIONING A TELEVISION CAMERA IN OPERATIVE PROXIMITY TO SAID OBJECT; CONNECTING A TELEVISION MONITOR ARRANGEMENT TO SAID CAMERA TO PROVIDE A VISUAL INDICATION OF AN OBJECT SEEN BY SAID CAMERA; MOUNTING SAID CAMERA FOR PIVOTAL MOVEMENT ABOUT A FIXED PIVOT POINT; ROTATING SAID CAMERA ABOUT SAID FIXED PIVOT POINT THEREBY TO SCAN SAID OBJECT ALONG THE ARCUATE SURFACE OF SAID OBJECT; CONVERTING THE MECHANICAL ROTATION OF SAID CAMERA TO AN ELECTRICAL SIGNAL PROPORTIONAL AT ANY INSTANT TO THE ANGLE OF MOVEMENT OF SAID CAMERA FROM A PREDETERMINED REFERENCE LINE; SOLVING A SELECTED TRIGONOMETRIC EQUATION CONSISTING OF SELECTED COMPONENTS HAVING PREDETERMINED VALUES AND HAVING OTHER VALUES DEPENDING UPON SELECTED TRIGONOMETRIC FUNCTIONS OF THE ANGLES OF MOVEMENT OF SAID CAMERA FROM SAID REFERENCE LINE TO OTHER PRESELECTED REFERENCE LINES RELATED TO SAID OBJECT AND TO SAID CAMERA AND PRODUCING AN OUTPUT SIGNALS HAVING A MAGNITUDE CORRESPONDING TO THE MAGNITUDE OF THE DIAMETER OF SAID OBJECT; REPRESENTING SAID OUTPUT SIGNAL AS THE MAGNITUDE OF THE DIAMETER OF SAID OBJECT; AND RECORDING SAID REPRESENTED MAGNITUDE.