US PATENT SUBCLASS 313 / 365
.~ Image pickup tube

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

364  DF  CATHODE RAY TUBE {11}
365.~ Image pickup tube {6}
366  DF  .~.~> Semiconductor depletion layer type {1}
369  DF  .~.~> Mechanically responsive (e.g., sound)
370  DF  .~.~> Particular transparent conductor
371  DF  .~.~> With optical element {1}
373  DF  .~.~> With photoemissive cathode {8}
384  DF  .~.~> Photoconductive {5}

DEFINITION

Classification: 313/365

(under subclass 364) Subject matter including structure responsive to electromagnetic radiation or compressional waves.

(1) Note. Included here are structures which emit electrons or change conductivity when irradiated with light, and structures responding piezoelectrically to compressional waves.

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2.1, for plural unit devices within the class definition which include a cathode ray device with a fluorescent screen and a photosensitive device, the light emitted by the fluorescent screen activating the photosensitive electrode.

346, and the classes and subclasses specified in the notes thereto, for photo-emissive cathodes, per se.

523+, for other photosensitive devices under the class definition.

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250, Radiant Energy,

330+, and 361+ for light amplifiers responsive to invisible radiation, subclass 213 for "light amplifiers", i.e., devices having a photosensitive cathode, and a fluorescent screen which is excited by the emission from the cathode so that there is correspondence between the light falling on the cathode and the light output of the fluorescent screen, and subclasses 216+ for cathode-ray tubes which are provided with a photosensitive electrode in combination with a separable optical means for controlling the light impressed upon the photosensitive electrode.

315, Electric Lamp and Discharge Devices: Systems,

10+, for systems for supplying electrical energy to cathode-ray tubes, the system including light sensitive means to control the operation of the cathode-ray tube. The cathode-ray tube in the system may have a light sensitive electrode.