US PATENT SUBCLASS 313 / 299
.~.~.~ Aligned apertures (e.g., beam power)

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  DF  .~.~ Serially arranged {3}
299.~.~.~ Aligned apertures (e.g., beam power)

DEFINITION

Classification: 313/299

(under subclass 297) Discharge devices where the openings in at least two of the apertured or grid-like electrodes are located in aligned relation upon a straight line drawn between the electrodes defining the inter-electrode space so that the effective obstructing area of such two apertured or grid-like electrodes to the space discharge is not greater than the effective obstructing area of either of the two foraminous or grid-like electrodes.

(1) Note. This subclass includes only patents as originals which claim the aligned relationship of the openings in the two apertured or grid-like electrodes. Only patents where there is a definite statement in the specification that the openings in the two apertured or grid-like electrodes are aligned along a straight line are cross-referenced into this subclass.

(2) Note. This subclass includes discharge devices of the type known as beam power tubes.

SEE OR SEARCH THIS CLASS, SUBCLASS:

409+, for plural beam generators which may include control electrons.

447+, for control electrodes between the cathode and target.