US PATENT SUBCLASS 313 / 409
.~ Plural beam generating or control

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

364  DF  CATHODE RAY TUBE {11}
409.~ Plural beam generating or control {7}
410  DF  .~.~> With character forming electrode
411  DF  .~.~> One cathode source of plural beams
412  DF  .~.~> Convergence
413  DF  .~.~> With deflection
414  DF  .~.~> With focusing and accelerating electrodes
415  DF  .~.~> With screen {1}
417  DF  .~.~> With electrode support

DEFINITION

Classification: 313/409

(under subclass 364) Subject matter including structure to produce or control a plurality of electron beams.

(1) Note. These devices may have a plurality of beam forming cathodes, each with beam forming means associated therewith, or a single cathode with means associated therewith for forming the discharge into a plurality of separate beams directed severally toward different targets or different parts of the same target.

SEE OR SEARCH THIS CLASS, SUBCLASS:

2.1, for plural unit devices under the class definition which include two cathode ray devices, each being provided with its own beam forming means and provided with a separate target for each beam.

SEE OR SEARCH CLASS

315, Electric Lamp and Discharge Devices: Systems,

5.14+, for cathode-ray tube circuits which include a plurality of beam forming cathodes and a hollow distributed parameter device such as a wave guide, resonator, or co-axial line, the beams formed by the cathodes passing through or in the device; and subclasses 368.11+ for a cathode-ray device having convergence control circuitry. See also (1) Note under subclass 5.14 and subclasses 13.1+ for systems for supplying electrical energy to cathode-ray tubes which are provided with means for forming a plurality of separate cathode-ray beams. 378, X-Ray or Gamma Ray Systems or Devices,

134, for X-ray devices under the class definition which include a plurality of cathodes.