.~.~ Special photocell or electron tube circuits {15}
214 AL
.~.~.~ Ambient light responsive
Unofficial Alpha Subclasses: R P D A LA LS VT PR SG AG AL B C DC RC SF SW
DEFINITION
Classification: 250/214
(under subclass 206) Subject matter including means to electrically connect a particular photocell or electron tube with one or more electrical or electronic devices in a closed or closable electrically conducting path.
SEE OR SEARCH THIS CLASS, SUBCLASS:
315, Electric Lamp and Discharge Devices: Systems, subclasses 10+ for photocell circuits in which the photocell controls a cathode-ray tube or in which the photocell is part of a cathode-ray tube, and subclasses 149+ for photocell circuits in which the photocell controls a lamp or gas or vapor discharge device.
