(under subclass 213) Subject matter in which the shutter or the diaphragm responds to a device sensing a deflected position of a galvanometer needle.
(1) Note. A galvanometer is an instrument having a needle attached to a coil rotated by electrodynamic force when a current is passed through the coil.
SEE OR SEARCH THIS CLASS, SUBCLASS:
, FOR 738, for a foreign art collection involving camera automatic exposure control having clamp or stop needle-type control of a diaphragm shutter.
, FOR 747, for a foreign art collection involving camera automatic exposure control having clamp or stop needle-type control of a diaphragm.
SEE OR SEARCH CLASS
324, Electricity: Measuring and Testing, 76.11+, for measuring electricity using a galvanometer.
