(under the class definition) Discharge devices which have three or more electrodes.
(1) Note. See the glossary in the class definition for the definition of a three or more electrode discharge device.
(2) Note. This is a residual subclass and provides only for discharge devices having three or more electrodes which are not provided for in the subclasses above. The search should include the subclasses providing for special types of discharge devices where a specific type of discharge device is involved. For example, secondary emissive discharge devices (e.g., electron multipliers) having three or more electrodes are classified in subclasses 103+ above and not cross-referenced to this subclass. Where the discharge device is provided for in some general subclass above, such as subclasses 11+ (with temperature modifier), or subclasses 238+ (with support and/or spacing structure for electrode and/or shield) and structure in addition to that provided for in the general subclass being disclosed, and the patent is not cross-referenced to a subclass providing for a special type of discharge device, the patent is cross-referenced into this subclass. The notes below refer to some of the subclasses which specifically provide for three or more electrode discharge devices.
SEE OR SEARCH THIS CLASS, SUBCLASS:
1+, for plural unit discharge devices which have at least two cathodes and an anode for each cathode.
103+, and the subclasses specified in the notes thereto, for discharge devices of the secondary emitter type (e.g., electron multiplier) which have three or more electrodes. 123+, and 140, for spark plugs having 3 or more electrodes.
162, for discharge devices which have three or more electrodes and a magnetic device for influencing the space discharge.
166, 167 through 169, 170+ and 172, for liquid (e.g., mercury) electrode discharge devices having three or more electrodes. See subclass 166 where one of the electrodes is external of the envelope, 167 where one of the electrodes is an apertured or grid-like electrode, 168 and 169, where a plurality of the electrodes are anodes, 170+ where one of the electrodes is an auxiliary starting electrode, and subclass 172 for liquid electrode discharge devices which have two electrodes immersed in the liquid electrode, the liquid electrode being vaporized to initiate the discharge and to supply the gas or vapor atmosphere in the device.
234, where the discharge device has one of the three or more electrodes exterior to the envelope of the device.
236, for discharge devices which are provided with three or more electrodes and means for selectively using the electrodes so that the discharge device may be operated without one of the electrodes being operated, one electrode being substituted for the other when the first operated electrode becomes defective.
238+, for discharge devices which include supporting and/or spacing structure for three or more electrodes. If structure in addition to the electrode supporting and/or spacing structure is disclosed or is claimed, the patent is cross-referenced to this or one of the indented subclasses where the discharge device has three or more electrodes if it is not specifically provided for in a subclass other than subclasses 238+ which precedes this subclass (306).
293+, for discharge devices which have an apertured or grid-like electrode interposed in the inter-electrode space between two other electrodes.
305, for discharge devices which have an electrode designed to act as a cathode with respect to one electrode and an anode with respect to a cathode, the electrode being heated by the bombardment of electrons from the cathode and emitting electrons to the anode.
364+, for cathode-ray tube having three or more electrodes.
531, for photosensitive discharge devices which have a plurality of photosensitive electrodes.
540, for photosensitive discharge devices which have a plurality of cathodes, at least one of which is not photosensitive and 540, for photosensitive discharge devices which have a plurality of anodes. 581, where the discharge device has an envelope which contains a gas or vapor.
SEE OR SEARCH CLASS
314, Electric Lamp and Discharge Devices: Consumable Electrodes,
7+, for consumable electrode discharge devices (e.g., arc lamps and similar devices having means to feed the electrodes together as they are consumed) where the structure includes at least two cathodes each having a separate anode, subclass 31 for polyphase A. C. type consumable electrode type devices, subclass 33 where the consumable electrode discharge device is provided with three or more series connected electrodes, and subclasses 36+ for the consumable electrode discharge devices which have a plurality of cathodes or a plurality of anodes.
315, Electric Lamp and Discharge Devices: Systems,
5.16+, 5.27, 5.28, and 5.39+ for cathode-ray tube circuits including a plurality of hollow distributed parameter devices such as a wave guide, cavity resonator, or co-axial line through or in which the ray passes; and subclasses 34 to 63 for discharge devices which have three or more electrodes and which have structurally combined therewith a circuit element
such as an electric switch or an impedance.
378, X-Ray or Gamma Ray Systems or Devices,
124, and 134 for X-ray devices which have a plurality of cathodes or anodes.
