(under the class definition) Structure providing a single
channel of indefinite length for conveying and guiding wave energy, and having distributed electrical parameters so related or proportioned as to determine the wave propagating characteristics of the channel.
SEE OR SEARCH THIS CLASS, SUBCLASS:
12, for long lines with means to eliminate interference currents therein or with means to minimize radiation therefrom.
22, for dissipative terminations for transmission lines.
23, for artificial lines simulating a transmission line.
26, for coupling networks for connecting balanced to unbalanced circuits or vice versa which include a long line element.
27, for transmission lines with coupling networks at the opposed ends. 33+, for impedance matching networks which include a long line element.
202+, for filters which include a long line element.
SEE OR SEARCH CLASS
174, Electricity: Conductors and Insulators, appropriate subclasses for conductor structure other than loaded lines and lines defined as having long line characteristics; see
27, and 113+ for parallel or twisted conductor structures; subclasses 28 and 102+ for coaxial and shielded cable structure; subclasses 32+ for anti-inductive conductor structures; subclasses 37+ for underground conductor structures; and subclasses 40+ for overhead conductor structures.
178, Telegraphy, for telegraph transmission line systems; and particularly
45+, for loaded circuits; subclass 63 for long cable systems; and subclass 69 for line-clearing and circuit-maintenance systems.
307, Electrical Transmission or Interconnection Systems, appropriate subclasses, particularly
146, and 147+ for miscellaneous systems of distribution with transmission lines usually of the electrically short type.
315, Electric Lamp and Discharge Devices: Systems,
3.5+, and 4+ for transmission line sections structurally combined with cathode-ray tubes; and subclasses 39+ for
electronic tubes which are structurally combined with a transmission line of the distributed parameter type. 324, Electricity: Measuring and Testing,
51+, 54, 66+, 95, and 600+ for arrangements to determine the electrical characteristics of transmission lines.
329, Demodulators,
322, for a frequency demodulator including distributed parameter structure and subclass 354 for an amplitude demodulator including distributed parameter structure.
330, Amplifiers,
53+, for amplifiers coupled to a long line.
340, Communications: Electrical, for miscellaneous electrical signaling systems which include a long line. Note
310.01+, for such systems where the signal is transmitted over a power line; and subclass 320 for signaling using a fluid conduit to transmit the signal.
343, Communications: Radio Wave Antennas,
700+, for antennas which may involve long lines.
379, Telephonic Communications, for telephone transmission line systems; particularly
90.01+, for composite systems (e.g., telegraph and telephone); subclass 398 for anti-inductive systems; and subclasses 1+ for long line testing device.
