(under the class definition) Systems wherein the load device through which the current passes is formed of a pyroelectric material.
(1) Note. Pyroelectric materials, or second class conducting materials, have a high electrical resistance at ordinary temperatures, and low electrical resistance when heated to a high temperature.
SEE OR SEARCH THIS CLASS, SUBCLASS:
114, and subclass 115 and indented subclass, for systems having a pyroelectric load device which is provided with an electric heater for the pyroelectric material, the system including means to supply electric current to the heater.
SEE OR SEARCH CLASS
313, Electric Lamp and Discharge Devices,
14, for the structure of pyro-electric type lamps where the lamp is provided with a heating means for heating the pyroelectric material, and subclass 315 for the structure of other pyroelectric lamps.
