Surface profile follower and indicator system

摘要: A surface profile follower and indicator system is disclosed which pneumaally senses follows the gradients occurring in of a modelboard by means pneumatic probe negative feedback control sub-system maintains said at predetermined distance from being sensed any given instant, as entire moved such manner to effect desired traverse thereof suitable carrier vehicle. position pick-off effectively connected aforesaid subsystem supplies an analog signal appropriate readout which, turn, indicates with respect datum, thereby indicating irregularities modelboard.