(under subclass 234) Subject matter having means for cyclically moving an element of the optical system in a repetitious path.
(1) Note. This subclass includes photocell devices having a vibratory scanner. An adjusting means is not deemed a means for providing a repetitious path, since there is no means for ensuring repetition or cycling. A hunting device which follows another element does not cycle, even though the followed element may, during its motion, fortuitously cycle.
