Pmc Industries, Inc.

James E Boehnlein

A profiler employing an arm which rocks about a fixed axis and carries a stylus for following a profile to be indicated and recorded. During rocking of the arm from, and return to, a normal starting position, the arm is extended by a cam, and spring returned under the control of the cam, so that the surface engaging edge of the stylus follows a lineal path tangent to the arcuate path which the edge would follow were the arm of constant length. The point of tangency of the lineal path is at the position of the surface engaging edge in the normal starting position of the arm. This adapts the profiler for more accurate indications of profiles, especially in profiles in which departures from the mean are large. A second like arm and stylus are provided and arranged so that the stylus edge follows a lineal path coincident with the same tangent. As a result profiles of opposite faces of an article can be traced by the styli, respectively, simultaneously, at points aligned with each other lengthwise of the tangent.

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Mentor, OH, United States of America

James E Boehnlein