US PATENT SUBCLASS 315 / 380
.~.~.~ Control only at turn-on or turnoff of circuit

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

1  DF  CATHODE RAY TUBE CIRCUITS {11}
364  DF  .~ Cathode-ray deflections circuits {16}
379  DF  .~.~ With additional control of cathode ray {3}
380.~.~.~ Control only at turn-on or turnoff of circuit {1}
381  DF  .~.~.~.~> Circuits control grid-cathode circuit of tube

DEFINITION

Classification: 315/380

(under subclass 379) Subject matter wherein the circuit which controls the deflection means functions to control the cathode-ray beam of the tube only at initiation or termination of the cathode-ray beam.

SEE OR SEARCH CLASS

342, Communications: Directive Radio Wave Systems and Devices (e.g., Radar, Radio Navigation),

118+, for echo systems of the distance determining pulse type wherein the echo may cause actuation of a cathode-ray tube display device.

348, Television,

377, for a color television system having a circuit to control the high voltage anode or the intensity of the cathode rays of a color television tube to prevent tube

damage or X-ray emission from the tube.