(under subclass 364) Subject matter having a window which is permeable to electrons so that the electrons may pass through
the window and out of the envelope containing the discharge electrodes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
317, for other devices under the class definition provided with an electron permeable envelope.
359.1+, for discharge devices under the class definition which are provided with means for accelerating positive ions and which may be provided with an ion transparent envelope.
588, for gas or vapor type discharge devices provided with one chamber in which an ionizing discharge is adapted to be maintained, an electron permeable barrier being provided so that electrons from the ionizing discharge can pass into a second chamber where an electronic discharge is designed to be maintained.
SEE OR SEARCH CLASS 220, Receptacles,
2.1+, for envelopes, per se, for lamps and discharge devices, note that subclass 2.3 provides for such envelopes where a portion of the envelope is made of conductive material.
250, Radiant Energy,
306+, for methods and apparatus to inspect solids or liquids by charged particles and subclasses 492.1+ for the irradiation of objects and material generally.
