(under subclass 218) Subject matter including significant indicating device structure such as scales and pointers or such indicating structure bearing a particular structural relationship with the light responsive device.
(1) Note. The patents here are often directed to placing the light responsive device and the meter or indicator in particular related positions in the housing as to provide a compact arrangement.
SEE OR SEARCH CLASS
116, Signals and Indicators,
200+, for indicators generally, and especially subclasses 284+ for rotary indicators and subclasses 327+ for pointers and indicator arms.
235, Registers, 64.7, for photos:graphic calculators.
324, Electricity: Measuring and Testing,
76.11+, for galvanometer type meters, and especially subclasses 151+ for such meters with permanent magnets.
