US PATENT SUBCLASS 313 / 293
DISCHARGING DEVICES WITH APERTURED ELECTRODE (E.G., GRID) INTERPOSED BETWEEN TWO ELECTRODES

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

293DISCHARGING DEVICES WITH APERTURED ELECTRODE (E.G., GRID) INTERPOSED BETWEEN TWO ELECTRODES {6}
294  DF  .~> Non-uniformly spaced from another electrode
295  DF  .~> Interposed electrode with non-uniform mesh area (e.g., variable mu)
296  DF  .~> Plural interposed apertured electrodes {2}
302  DF  .~> Plural cathodes
303  DF  .~> Three or more nonemissive electrodes (e.g., plural anodes)
304  DF  .~> Plural-parallel-section cathode with electrode surrounding each section

DEFINITION

Classification: 313/293

(under the class definition) Discharge devices which are provided with three or more electrodes, at least one of the electrodes being an apertured or grid-like electrode, the apertured or grid-like electrode being interposed between two of the other electrodes so that a straight line drawn between the two other electrodes will pass through the apertured or grid-like electrode.

(1) Note. The apertured or grid-like electrode may be formed of open work material such as wire mesh or perforated sheet material, or may be formed of wires or bars, such as coiled wire or otherwise provided with one or more openings in the wall of the electrode.

(2) Note. To be classified in this subclass the claims must state that the grid electrode is interposed between two other electrodes. Where a patent claims only that the discharge device includes a cathode, an anode, and a grid electrode, the patent is excluded from this and the indented subclasses and will be classified in subclass 308 or one of the

subclasses specified in the notes to the definitions of that subclass.

(3) Note. In some of the devices in this and the indented subclasses the foraminous or grid-like electrode is intended to be used to control the discharge between the cathode and anode of the discharge device. In other of the devices, the interposed foraminous or grid-like electrode is intended to be used as an anode in the discharge device.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5+, where the device includes a plurality of separate discharge devices which are structurally combined to form a single unitary device (e.g., multiple unit devices), one or more of the discharge devices having an apertured or grid electrode interposed in the discharge space between two of the electrodes. 146+, where the apertured or grid electrode is mounted so that it is movable.

153+, where the discharge device is also provided with a magnetic device for influencing the space discharge.

167, where the discharge device has a liquid electrode.

238+, for patents for discharge devices which include an apertured or grid electrode interposed between two other electrodes where significant supporting and/or spacing structure for the electrodes is claimed. Where the claims include significant supporting and/or spacing structure for the electrodes, the patent is classified in subclasses 238+ and cross-referenced to this or one of the indented subclasses when structure in addition to the supporting and/or spacing structure for the electrodes is claimed or disclosed. See especially indented subclass 265.

308, and the subclasses specified in the notes to the definition of that subclass for other discharge devices which are provided with a discharge control electrode. Also see note 2 above.

325, for discharge devices provided with an electrode which is formed of nonforaminous material which is permeable to electrons.

326, for electrode structures which have only a single aperture.

348+, for the structure of foraminous and grid-like electrodes, per se.

356, for the structure of tubular and other hollow sleeve-like electrodes.

441, and the subclasses specified in the notes thereto, for

cathode ray devices which have an apertured electrode interposed between the cathode and the target for concentrating, shaping, accelerating, or decelerating the cathode-ray beam.

537, for photosensitive discharge devices which have an apertured or grid electrode interposed between two other electrodes. 597+, and the subclasses specified in the notes thereto where the discharge device is provided with an envelope containing an atmosphere of gas or vapor.

SEE OR SEARCH CLASS

315, Electric Lamp and Discharge Devices: Systems,

33, 63 for discharge devices which have a grid or other apertured electrode interposed in the discharge space between two electrodes and which also have a circuit element (e.g., inductance switch, resistor) structurally combined with the discharge device so as to form a unitary device. See subclass 34 where the discharge device includes an antenna, subclasses 35+ where the structural combination includes a plurality of such discharge devices and a circuit element, subclass 39 where the discharge device includes a wave guide, coaxial cable or resonate parallel wire transmission line, subclass 39.63 where the discharge device has an electrode formed so as to provide a structure having distributed inductance and capacitance, and operable in a magnetic field (e.g., magnetrons), subclasses 41+ where the discharge device has an inductive impedance connected between the electrodes, 51+, where the discharge device has structurally combined therewith an electric generator or piezo-electric device, and subclasses 56+ for the miscellaneous discharge devices which have an apertured or grid electrode interposed in a discharge space between two other electrodes and which have a circuit element structurally combined therewith.