ABSTRACT
C. Tooth Profile Measuring System [3,4] In 1968, the authors read a paper on a new involute tooth profile measuring sys tem, which was the first success in excluding an involute generating mechanism in the world, at an academic annual meeting sponsored by Japan Society o f Precision Engineers. 1968 was the epoch-making year in the history o f gear measuring tech nique in Japan, because information processing based on digital electronic tech nique had been substituted for mechanical information generating. From that time on, this new technology was applied and developed for not only tooth profile
