US PATENT SUBCLASS 333 / 219
RESONATORS (DISTRIBUTED PARAMETER TYPE)

Current as of: June, 1999
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333 /   HD   WAVE TRANSMISSION LINES AND NETWORKS

219RESONATORS (DISTRIBUTED PARAMETER TYPE) {7}
219.1  DF  .~> Dielectric type
219.2  DF  .~> Magnetic type
220  DF  .~> Open wire or Lecher line {1}
222  DF  .~> Coaxial or shielded {1}
227  DF  .~> Cavity resonator {4}
234  DF  .~> Temperature compensated
235  DF  .~> With tuning

DEFINITION

Classification: 333/219

RESONATORS (DISTRIBUTED PARAMETER TYPE):

(under the class definition) Devices comprising conductive enclosures, cavities, or wave transmission line sections of the two terminal types and having distributed inductance and capacitance, the line sections being terminated in other than the characteristic impedance of the line sections, the

devices presenting resonant characteristics to the exciting source of wave energy, and systems within the class definition which include such devices.

(1) Note. This subclass includes resonators even if they are provided with tuning means and designated as tuners.

SEE OR SEARCH THIS CLASS, SUBCLASS:

245+, for long line elements which are terminated in other than their characteristic impedance and which are nonresonant, i.e., transmission line elements which are effectively inductances or capacitances, such as being 1/8 of a wave-length long.

SEE OR SEARCH CLASS

315, Electric Lamp and Discharge Devices: Systems,

4+, for cathode-ray tubes which have structurally combined therewith a resonant structure; subclasses 39+ for electronic tubes having structurally combined therewith a resonant transmission line; and subclasses 39.51+ and 40 for other electronic tubes which include resonant structures. 330, Amplifiers,

53+, for amplifiers having distributed parameter coupling which may be resonant; subclass 45 for electron beam type amplifiers having cavity resonator coupling means; subclass 49 for amplifiers wherein the active element is a tube having distributed parameter characteristics which may be resonant.

331, Oscillators,

5, 6+, 9, 79+, 86+, 93, and 96+ for oscillator systems utilizing distributed parameter resonators as an element thereof.

332, Modulators, particularly

129+, for resonators in frequency modulators and subclasses 163+ for resonators in amplitude modulators.

343, Communications: Radio Wave Antennas,

723, for single adjustable length electrically long linear antennas; subclasses 745+ for antennas with a variable reactance for tuning the antenna; subclasses 746 and 767+ for slot-type antennas which may include resonator structure; subclasses 790+ for sleeve-type antennas; subclasses 793+ for balanced doublet-type antennas which may have resonant characteristics; subclasses 825+ for fractional, multiple, or full wavelength-type antennas; and subclass 843 for antennas having an appreciable wave-length dimension.

455, Telecommunications,

130+, for radio receivers using resonators, see particularly subclasses 325+ for frequency conversion means with distributed parameter elements which may be resonant.