(under subclass 1) Subject matter wherein the system is provided with means, or where there is shielding means for part of the system to prevent stray electromagnetic fields from deflecting the cathode-ray from the desired path.
(1) Note. Where the patent claims the source of interference, as a transformer, etc., but does not claim its
connection in its own circuit, the patent is included in this subclass. Where the device causing the interference is claimed as connected in its own system, the patent is classified with the art which provides for the combination of a cathode-ray tube system and the system which includes the source of interference. If the interfering device is in the circuit of the cathode-ray tube, the patent is classified in this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
85, for other systems under the class definition wherein the system includes means, or where there is shielding means for part of the system, to prevent radiation of electromagnetic waves to and/or from the system or some part thereof.
SEE OR SEARCH CLASS
313, Electric Lamp and Discharge Devices, 364+, for cathode-ray tubes provided with shielding means for the tube and subclass 313 and the subclasses specified in the Notes thereto for miscellaneous discharge devices provided with shielding means.
