(under subclass 11) Subject matter having a glower formed of a second class conductor designed for connection into an electrical circuit, and having means for heating the glower to render it conductive.
(1) Note. The devices in this subclass are mostly pyroelectric lamps.
(2) Note. See "Glossary" in the class definition for a definition of second class conductor, glower, pyroelectric lamps.
SEE OR SEARCH THIS CLASS, SUBCLASS:
9, for devices under class definition which include a filament and a body not designed to be connected into an electrical circuit which is heated to incandescence by the filament.
326+, for the structure of pyroelectric glowers, per se.
SEE OR SEARCH CLASS 252, Compositions,
500+, for pyroelectric glower compositions.
315, Electric Lamp and Discharge Devices: Systems,
115+, for pyroelectric lamp systems having an electric heater for the glower and circuit means for controlling or supplying electric current to the glower or the heater element, and subclass 359 for miscellaneous systems for supplying electric current to pyroelectric lamps.
338, Electrical Resistors,
25+, for electrical resistors whose resistance value is responsive to a change in ambient temperature.
