An automatic control system with provision for scanning and memory

This paper describes a system for adjusting a control element to produce a maximum or minimum value of a resulting parameter. The control element is scanned through its entire range of adjustment and returned to the position resulting in the desired maximum or minimum effect. In a system where several maxima or minima are present, the tuning equipment reliably selects the largest. The apparatus required is simple and easily understood and maintained by relatively unskilled personnel.