US PATENT SUBCLASS 313 / 297
.~.~ Serially arranged

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

293  DF  DISCHARGING DEVICES WITH APERTURED ELECTRODE (E.G., GRID) INTERPOSED BETWEEN TWO ELECTRODES {6}
296  DF  .~ Plural interposed apertured electrodes {2}
297.~.~ Serially arranged {3}
298  DF  .~.~.~> Plural interelectrode discharge
299  DF  .~.~.~> Aligned apertures (e.g., beam power)
300  DF  .~.~.~> Three or more serially arranged

DEFINITION

Classification: 313/297

(under subclass 296) Discharge devices having a plurality of apertured or grid-like electrodes interposed in superimposed relation with respect to each other in the inter-electrode space so that a straight line drawn between the electrodes which define the inter-electrode space will pass through both of the apertured or grid-like electrodes.

(1) Note. This subclass includes, for example, plural grid discharge devices such as discharge devices provided with a screen grid and a control grid, discharge devices with two control grids, discharge devices with a control grid and a suppressor grid, and discharge devices where one of the apertured or grid-like electrodes is intended to be used as a first anode and another apertured or grid-like electrode is intended to be used as a control grid, one of the electrodes defining the inter-electrode space being a second anode.

SEE OR SEARCH THIS CLASS, SUBCLASS:

295, where one of the grid-like electrodes has the ratio of area of free passage through the openings in the electrode to the obturating area of the electrode different from such ratio in another region of the electrode (e.g., variable-mu discharge devices).

447, for cathode ray devices which have a plurality of apertured or grid-like electrodes interposed between the cathode and the target.

599, where the discharge device is provided with an envelope containing an atmosphere of gas or vapor.