(under subclass 1) Subject matter wherein the cathode-ray tube is provided with ray modulating means, and the circuit includes means to apply potential and/or current to the ray modulating means.
(1) Note. Ray modulating means is defined as being any means for varying the number of electrons in the cathode-ray beam, and to exclude focusing, concentrating, and ray accelerating means.
(2) Note. This subclass does not include systems wherein the only ray control means is a means which is supplied with current and/or potential to maintain a constant accelerating and/or de-accelerating field for the cathode-ray.
SEE OR SEARCH THIS CLASS, SUBCLASS:
14, and the indented subclasses and the subclasses specified in the notes to the definition of these subclasses for other systems wherein the cathode-ray tube is provided with a plurality of accelerating and/or de-accelerating stages.
349, and the indented subclasses and the subclasses referred to in the notes to the definition of these subclasses for systems under the class definition which include a gas or vapor discharge device which is provided with a discharge control means.
364+, where the cathode-ray tube is provided with ray sweep means, and the system includes means for supplying current and/or potential to the sweep means and to the discharge intensity control means. 380+, where the system includes means for applying suitable potential and/or current to the ray intensity control means to prevent the ray from being projected upon the ray receiving anode or target when the ray sweep circuit becomes
inoperative to continue the ray sweeping.
SEE OR SEARCH CLASS
313, Electric Lamp and Discharge Devices,
446+, and the subclasses specified in the Notes thereto for cathode-ray tube structures which have a ray modulating means.
327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems, appropriate subclasses for miscellaneous systems which include a discharge device provided with a discharge control means.
