(under subclass 1) Systems wherein at least one of the transmission lines is a balanced line, or having a network under subclass 1 which is especially designed for connection to at least one balanced circuit.
(1) Note. A balanced line or circuit is a line or circuit having its conductors electrically symmetrical with respect to a reference potential plane (e.g. ground).
SEE OR SEARCH THIS CLASS, SUBCLASS:
12, for transmission line inductive or radiation interference reduction systems, involving a balanced transmission circuit.
25+, for coupling networks for coupling a single channel balanced circuit to an unbalanced circuit.
236+, for single transmission lines of the long line type, which may be balanced.
SEE OR SEARCH CLASS 174, Electricity: Conductors and Insulators, particularly
32+, 37+, 40+, and 68.1+ for electrical conductor structure of the electrically balanced type other than loaded lines or transmission lines defined as having long line characteristics.
307, Electrical Transmission or Interconnection Systems, particularly
12+, 42 or 147+ for miscellaneous electrical transmission or interconnecting systems which include balanced circuits.
343, Communications: Radio Wave,
814, and 816 for plural balanced doublet antennas with coupling networks; and subclass 865 for a balanced antenna with a balanced coupling network.
363, Electric Power Conversion Systems, particularly
2+, 9+, 36, and 148+ for balanced phase conversion systems for converting electrical energy from one number of phases to a different number of phases (e.g., single phase to
polyphase).
365, Static Information Storage and Retrieval,
202, for complementing or balancing signals used in a read/write circuit.
370, Multiplex Communications, 200, for a phantom circuit used in the multiplex system, and subclasses 278 and 282+ for a duplex system which may include a balance circuit.
379, Telephonic Communications, for telephone systems which involve balanced transmission lines.
