Abstract: A caliper (10) for measuring the thickness of a blade edge composed of: a pair of opposed jaws (11,12) disposed for displacement relative to each other in a first direction, a sliding member (31) mounted to one of the jaws (12) for displacement relative to the one of the jaws (12) in a second direction, the second direction having a component perpendicular to the first direction, the sliding member (31) defining a stop edge between the jaws (11,12), and a guiding member (21) operatively associated with the sliding member (31) for causing the magnitude of the displacement of the sliding member (31) in the second direction to be a fixed proportion of the magnitude of relative displacement of the jaws (11,12) in the first direction.

Abstract: An adapter for a Bader grinder which permits rapid and easy change from vertical to horizontal grinding wherein the adapter has a quick mounting base portion with two pivoted arms each having a wheel rotatably mounted on the distal end and means for adjusting the angular position of the wheels with respect to the base. The contact wheel is generally oriented horizontally and its support arm is pivotally mounted on the distal end of the base to provide a horizontally moving belt to the workpiece.