.~ Having circuit for controlling a diaphragm shutter (354/435) {4}
FOR 738
.~.~ Clamp or stop needle type (354/438)
DEFINITION
Classification: 396/FOR.738
Clamp or stop needle type: (354/438)
Subject matter under subclass FOR 735 in which the specific maximum aperture is set by a follower making mechanical contact with the needle of a galvanometer which is controlled by the circuit.