US PATENT SUBCLASS 313 / 421
.~ Beam deflecting means

Current as of: June, 1999
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313 /   HD   ELECTRIC LAMP AND DISCHARGE DEVICES

364  DF  CATHODE RAY TUBE {11}
421.~ Beam deflecting means {7}
422  DF  .~.~> Flat tube type
423  DF  .~.~> Electron reflecting mirror
424  DF  .~.~> Ion trap
425  DF  .~.~> Centering
426  DF  .~.~> Plural {2}
439  DF  .~.~> Electrostatic
440  DF  .~.~> With yoke

DEFINITION

Classification: 313/421

(under subclass 364) Subject matter having means to deflect the beam.

(1) Note. A pair of electrodes, one on each side of the beam path so that a potential applied to them causes one to attract and the other to repel the beam is considered to be a single deflecting means. Two such pairs of electrodes each pair operable separately of the other pair are considered to constitute two deflecting means. In general any means capable of deflecting the beam out of its path in a single direction is considered a single deflecting means, and any means capable of deflecting the beam out of its path in two dimensions is considered to be plural deflecting means. Also considered to be cathode-ray tubes with plural deflecting means are cathode-ray tubes which are provided with means to deflect the cathode ray into different directions in a single plane.

(2) Note. This subclass includes cathode- ray tubes which are provided with a single magnetic means for deflecting the cathode ray.

(3) Note. For the classification of deflection magnets, per se, see the class definition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

153, for other discharge devices provided with magnetic means for influencing the discharge. SEE OR SEARCH CLASS

315, Electric Lamp and Discharge Devices: Systems,

364+, and indented subclasses for electric systems for supplying electric current and/or potentials to cathode-ray tubes, which are provided with ray deflecting circuits, subclasses 393+ where the cathode ray is swept in different planes (e.g., horizontal and vertical sweeping), subclasses 391+ where the cathode ray is merely deflected (e.g., bent) and also swept in one plane or is swept in two different directions in a single plane, and subclasses 399+ for the systems for supplying electric currents to the deflecting electromagnets of a cathode-ray tube.

331, Oscillators,

80, for oscillator systems utilizing a cathode-ray tube of the ray sweeping or deflecting type.

335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,

210+, for magnetic deflecting or focusing structure external to a cathode-ray tube.