(under subclass 364) Subject matter wherein the cathode-ray tube includes a cathode-ray beam source and a fluorescent target to receive the cathode-ray beam and the deflection means includes (1) two deflection means orthoepically positioned with respect to each other and operably connected to the cathode-ray tube, each deflection means having an electrical circuit including a periodic waveform generator, the two waveforms being out of phase with respect to each other by ninety degrees to cause both deflection means to act simultaneously upon the cathode-ray beam to form a circular, spiral, or radial trace on the target or (2) a deflection
means connected to the electrical circuit to cause the cathode-ray beam to strike the target in a radial manner at various angular degrees about a point on the target or (3) deflection means including a combination of mechanical and electrical means to cause the cathode-ray beam to describe a circular trace on the fluorescent target when the cathode-ray beam source and deflection circuitry are energized.
(1) Note. Included are circular, spiral, and sector sweep circuits.
SEE OR SEARCH THIS CLASS, SUBCLASS:
372+, for plural target cathode-ray tubes which may utilize a circular, spiral, or radial sweep system to control the cathode-ray beam of the tube.
SEE OR SEARCH CLASS
342, Communications: Directive Radio Wave Systems and Devices (e.g., Radar, Radio Navigation), 176+, for radar systems having a cathode-ray tube readout which may use a circular, spiral, or radial deflection of the cathode-ray beam of the tube.
367, Communications, Electrical: Acoustic Wave Systems and Devices,
113, for compressional wave echo location systems having a cathode-ray tube readout which uses a circular, spiral, or radial deflection of the cathode-ray beam of the tube.
