US PATENT SUBCLASS 178 / 43
.~ Space induction
Current as of: June, 1999
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DEFINITION
Classification: 178/43
(under subclass 2) Systems for transmitting messages by induction (electrostatic or electromagnetic) through the intervening space between neighboring or adjacent conductors, coils, or other circuit elements.
SEE OR SEARCH THIS CLASS, SUBCLASS:
49, for use of coil transformers for superposing electrostatic or induced current signals upon lines already carrying ordinary Morse or other signaling current.
64, for use of induction-coils, transformers, etc., for current intensifying systems where the only space induction, is between the primary and secondary coils or is incidental and inconsequential and the object of the invention is current intensification and not space transmission by induction.
SEE OR SEARCH CLASS
246, Railway Switches and Signals, 8, for inductive train telegraphy or telephony; subclass 63 for inductive cable signal or train control; and subclass 194 for inductive train mechanism control.
336, Inductor Devices, appropriate subclasses for the structure of transformers and inductive reactors.
342, Communications: Directive Radio Wave Systems and Devices (e.g., Radar, Radio Navigation), appropriate subclasses, for radio and wireless signal and teledynamic systems. See especially Class 343, Communications: Radio Wave Antennas,
866+, for loop type antennas.
379, Telephonic Communications,
55.1, for similar apparatus employed in telephony.
