Apparatus for measuring the diameter of a workpiece

摘要: A variable range gauge follower apparatus for measuring the diameter of work pieces comprising a pair pivotable arms each having contact at one end adapted to engage surface piece. Each has fixed it conjoint movement segment member an angular position Inductosyn its circumferential edge. Associated with is magnet sensing head stationarily so as be able sense induced current function displacement segment. Means are provided phase measurement two signals which when compared predetermined starting signal determines change and thus The mounted in shaft journaled frame-like body coupled rotation by meshing gears establish initial spacing or opening between arms. means their uncoupling during actual operation.