(under subclass 257) Subject matter with or including means which continuously senses a variable incident force or energy field and which varies or maintains the distribution,
composition or intensity of light from the source or modifier in response to changes in the sensed force or energy.
(1) Note. The sensing means of this subclass may respond, for example, to relative changes in direction of the force or gravity, changes in gas pressure, changes in incident radiant energy or changes in thermal energy.
(2) Note. The condition responsive means of this subclass type may vary the distribution composition or intensity of light continuously with changes in the sensed force or energy or abruptly at some level of sensed force or energy.
SEE OR SEARCH THIS CLASS, SUBCLASS:
384, for a light source or light source support, per se, movable by a gravity responsive pivoted weight.
SEE OR SEARCH CLASS 160, Flexible or Portable Closure, Partition, or Panel,
1+, for automatically controlled flexible closures and partitions of general utility.
250, Radiant Energy,
200+, for photocell electric circuits and photocell apparatus. Indented subclass 205 includes those photocells which control a shutter in the light path between light source and photocell; subclasses 552+ include a photocell means which detects a light emitting source wherein the source is solid state.
315, Electric Lamp and Discharge Devices: Systems,
82+, and 149+ for photoelectrically controlled electric lamp circuits (e.g., shifting from "bright" to "dim" filament).
340, Communications: Electrical, appropriate subclasses for condition responsive lamps which convey information about the condition sensed.
