.~.~> Light beam type (e.g., mirror galvanometer, parallax-free scale)
DEFINITION
Classification: 324/96
(under subclass 76) Subject matter utilizing radiant energy means as a part thereof.
(1) Note. A voltage being measured may, for example, be applied to an electric light and the luminuous flux produced by the light may be taken as a measure of the voltage being measured.
SEE OR SEARCH CLASS
250, Radiant Energy, appropriate subclasses for the detections of nuclear or invisible radiant energy particularly
336.1+, for invisible radiant energy responsive electric signalling devices.
343, Communications: Radio Wave Antennas, 703, for antenna combined with structure which tells the magnitude of the signal energy flowing in, to or from the antenna, a significant relationship existing between the antenna and the measuring structure.
356, Optics: Measuring and Testing,
46, for incandescent standards, and subclasses 213+ for photometers.
