(under the class definition) Networks specialized for use with and designed for connection to the end of a long line transmission line and including a resistive component for dissipating the wave energy propagated along the line and presenting an essentially resistive impedance to the line, and the combination of long transmission lines with energy dissipating terminations.
(1) Note. Usually the impedance presented by the network is equal to the characteristic impedance of the line for which it is designed.
(2) Note. The termination classified here is usually more than a mere resistance element such as is classified in Class 338, Electrical Resistors. The termination includes some structure, such as a long line element or component, so that
the device is not of general utility, but is limited to use with a transmission line. Long lines with mere resistance elements which would, per se, be classified in Class 338, are included in this subclass (22) when the resistance element is designed for use as a long line dissipating termination.
SEE OR SEARCH THIS CLASS, SUBCLASS:
23, for networks simulating transmission lines (i.e. artificial lines) whose function is not essentially dissipating terminal energy.
32+, for impedance matching networks whose function is coupling as opposed to termination. 81, for attenuators, which dissipate only a portion of the wave energy applied thereto.
SEE OR SEARCH CLASS
343, Communications: Radio Wave,
18, for radio wave absorption devices; subclasses 731+ for traveling wave type antennas which may involve a dissipating termination; and subclasses 739+ for antennas with a terminating resistance at open end.
361, Electricity: Electrical Systems and Devices,
117+, for surge dissipators and lightning arresters.
