(under subclass 445) Subject matter in which the sensing means responds to the mere presence or absence of, or the frequency, (i.e., color) intensity, magnitude or amount of radiant energy.
(1) Note. Sensing means which respond to the visible spectrum of light are included herein. Those means which respond to the infra-red or heat waves are classified in subclass 471 above.
SEE OR SEARCH THIS CLASS, SUBCLASS:
16, for motor systems in which the motor is controlled or operated by space transmitted electromagnetic or electrostatic energy.
460, for automatic control systems for electric motors where the motor is controlled by sound or supersonic vibrations.
SEE OR SEARCH CLASS
250, Radiant Energy, 200, and the classes and subclasses specified in the notes to the definitions of these subclasses for photo-cell controlled circuits and photo-cell apparatus.
