US PATENT SUBCLASS 315 / 3.5
.~.~ Traveling wave tube with delay-type transmission line

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  DF  .~ Combined cathode ray tube and circuit element structure {2}
3.5.~.~ Traveling wave tube with delay-type transmission line {1}
3.6  DF  .~.~.~> Line with plural characteristics or plural lines

DEFINITION

Classification: 315/3.5

(under subclass 3) Subject matter in which a transmission line or device arranged to propagate a traveling electromagnetic wave is constructed and arranged to have a wave component the velocity of which is reduced in comparison to the wave velocity in free space; and in conjunction therewith are means for generating an electron beam whose path is in such proximity to the path of said traveling wave component as to permit an exchange of energy between such beam and the traveling wave propagated along the transmission path.

(1) Note. Transmission line or device is defined to include any device which is used to guide or constrain electrical wave energy and to convey the energy from one place to another. Included are conductors and waveguides.

(2) Note. The transmission device may be constructed as a spiral or helix so that the wave has an axial velocity component along the helix which is lower than the free space velocity of the wave, or the transmission device may be loaded as by inductive members to reduce the velocity of the traveling wave.

SEE OR SEARCH THIS CLASS, SUBCLASS:

3, for cathode-ray tubes of the traveling wave type not included in this subclass or subclasses 4+.

4+, for other cathode-ray tubes which have structurally combined therewith an inductive or distributed parameter-type inductive structure (e.g., waveguide, coaxial cable, or parallel wire transmission line). See subclasses 5+ for traveling wave-type cathode-ray tubes having a hollow transmission line (e.g., waveguide) for a traveling wave, and having an electron beam means which is transverse to the transmission line so that energy may be exchanged between the beam and the traveling wave. 39.3, for other traveling wave-type electronic tubes having a velocity reducing-type transmission line but which do not have the space discharge path focussed or otherwise shaped into a beam.

SEE OR SEARCH CLASS

327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,

600, for miscellaneous circuits with particular beam tube structure.

330, Amplifiers,

43, for amplifier systems having traveling wave tubes. See Lines With Other Classes and Within This Class and References to Other Classes in the Class Definition of Class 330.

331, Oscillators,

82, for oscillation generating systems using beam tubes of the traveling wave type.

332, Modulators, especially

134, 147+, and 165+ for modulator systems using traveling wave tubes of the type classified in this subclass.

333, Wave Transmission Lines and Networks,

22, for transmission lines of the distributed parameter type (e.g., waveguides, long lines) having dissipating terminations, subclasses 138+ for delay networks, subclasses 32+ for impedance matching networks for transmission lines, subclass 81 for transmission lines of the long line with an attenuator means, and attenuators especially designed for use over a frequency band or for use in transmission lines of the distributed parameter type, and subclasses 236+ for the structure of transmission lines of the distributed parameter type.