US PATENT SUBCLASS 313 / 364
CATHODE RAY TUBE

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

364CATHODE RAY TUBE {11}
365  DF  .~> Image pickup tube {6}
391  DF  .~> Storage {6}
399  DF  .~> Secondary emissive electrode {2}
402  DF  .~> Shadow mask, support or shield {4}
409  DF  .~> Plural beam generating or control {7}
418  DF  .~> Signal translating output electrode {1}
420  DF  .~> Electron permeable window
421  DF  .~> Beam deflecting means {7}
441  DF  .~> Ray generating or control {6}
461  DF  .~> Screen {10}
477 R  DF  .~> Envelope {6}

DEFINITION

Classification: 313/364

(under the class definition) Subject matter including means to generate a beam of electrons in the form of a ray or to exchange energy therewith.

(1) Note. Cathode-ray tubes in general are characterized by being provided with one or more focusing electrodes or electromagnets for forming the electric space discharge into a restricted beam or ray of elemental cross-section. However, some cathode-ray tubes utilize the gas pressure within the envelope of the discharge device to form the cathode stream into a restricted pencil ray beam and such devices are included in this and the indented subclasses.

(2) Note. This and the indented subclasses do not include discharge devices of the so-called beam power type where the sole means for forming the electron stream into a restricted beam or ray is a plurality of grid electrodes or other apertured electrodes between the cathode and anode, with the apertures of the grid or other electrodes in alignment. However, this and the indented subclasses do include discharge devices similar in structure where in addition to the plurality of grid or apertured electrodes, other means (e.g., electrodes) are provided for the sole purpose of forming the discharge into a restricted beam or ray. The excluded subject matter will be found in subclass 299 of this class.

(3) Note. This and the indented subclass do not include discharge devices which are provided only with means for varying the width of the electron stream and which do not include any means whose purpose is to form the discharge into a restricted beam or ray. See subclass 107.5, for the excluded subject matter including discharge devices of the "magic eye" type.

SEE OR SEARCH THIS CLASS, SUBCLASS:

2.1, for plural unit devices under the class definition where one of the devices is a cathode-ray tube. 107.5, see (3) Note, above.

299, see (2) Note, above.

359.1, for discharge devices with means to accelerate positive or negative ions.

SEE OR SEARCH CLASS

250, Radiant Energy,

251, for neutron generators, subclasses 281+ for methods and apparatus for mass spectrometers which use discharge devices in the separation and analysis of material, subclass 305 for methods and apparatus for analyzing electrons by separating them on a velocity or momentum basis, subclasses 306+ for the inspection of solids or liquids by discharged particles and particularly subclass 311 for electron microscopes, subclasses 396+ for electron or ion beam deflection or focussing, means, subclasses 440.11+ for object supports used in charged particle inspection systems, subclasses 493.1+ for

evacuable chamber device with radiation detectors or detector supports and subclasses 492.1+ methods and apparatus to irradiate object or materials generally.

315, Electric Lamp and Discharge Devices: Systems,

3+, for cathode ray devices which have structurally combined therewith a circuit element, (e.g., a switch, impedance, cavity resonator, etc..).

347, Incremental Printing of Symbolic Information,

226+, for cathode-ray oscilloscopes (e.g., cathode-ray tubes having means, such as photos:graphic film, to make a record of the trace of the cathode ray), and subclasses 121+ for electrostatic recorders using electron beam in an air tight envelope for creating a charged pattern.

348, Television, 325+, and 805+ for cathode-ray tubes utilized in television systems in combination with optical elements, supports, and specific circuitry peculiar to television.

378, X-Ray or Gamma Ray Systems or Devices,

121+, for X-ray tubes.