US PATENT SUBCLASS 315 / 3
.~ Combined cathode ray tube and circuit element structure

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

1  DF  CATHODE RAY TUBE CIRCUITS {11}
3.~ Combined cathode ray tube and circuit element structure {2}
3.5  DF  .~.~> Traveling wave tube with delay-type transmission line {1}
4  DF  .~.~> Inductor or distributed parameter-type inductive structure {2}

DEFINITION

Classification: 315/3

(under subclass 1) Subject matter in which cathode-ray tubes are combined with circuit elements, all of which are structurally combined therewith to form a unitary device, see main class definition, sections (A) and (B).

(1) Note. The circuit element may be mounted within or on the base or envelope of the cathode-ray tube.

(2) Note. These subclasses include the combination of a cathode-ray tube load device and a circuit element where the tube and the circuit element are formed of separable parts, but are provided with means for fastening or assembling the parts together to form a unitary device.

(3) Note. Examples of devices considered to be circuit elements are electric switches, resistances, capacities, inductors, transmission lines of the distributed parameter type (e.g., coaxial lines), waveguides, antennas, transformers, structures formed so as to act as if possessed of distributed inductance and capacitance (e.g., resonators) and any other circuit element.

(4) Note. The circuit combined with the cathode-ray tube need not be a circuit element to be used in the circuit of the cathode-ray tube load device, but may be provided with separate terminals so as to be usable in any desired relation.

(5) Note. This and the indented subclasses include cathode-ray tubes wherein the electrodes and/or the electrode leads are formed so as to function as inductances. This and the indented subclasses do not include cathode-ray tubes

wherein the electrodes are formed of resistive material and no other circuit element is combined with the cathode-ray tube. (6) Note. Patents claiming a cathode-ray tube in combination with a separable socket receptacle or connector for the cathode-ray tube, the socket receptacles or connector including a circuit element, are not classified in these subclasses, but will be found either in subclass 1 or in the other subclasses under subclass 1.

SEE OR SEARCH THIS CLASS, SUBCLASS:

32, and indented subclasses for other types of electric discharge devices and for electric lamps combined with circuit elements, all of which are structurally combined to form a unitary device.

SEE OR SEARCH CLASS

313, Electric Lamp and Discharge Devices,

365+, provides for cathode- ray tubes which have a photosensitive electrode. Included in these subclasses in Class 313 are cathode-ray tubes where the photosensitive electrode is not in physical contact with a conductive supporting base or where the conductive supporting base is of high resistance material. No effort has been made to separate the cathode-ray tubes with photosensitive electrodes such as mosaic electrodes from each other on the basis of whether or not the electrode has a capacitor effect, a resistance effect, or is conductively connected to its lead-in conductor. All such cath-ode-ray tube structure has been placed in subclasses 365+ of Class 313.