US PATENT SUBCLASS 336 / 220
TWO WINDINGS
Current as of: June, 1999
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DEFINITION
Classification: 336/220
(under the class definition) Inductor devices comprising an inductor having two windings, each winding constituting a coil adapted to be connected to an external circuit and not provided for in any of the preceding subclasses.
(1) Note. Plural coils adapted to be connected in series and/or parallel are not considered to constitute plural windings for classification in this subclass, but are considered a single winding formed of plural coils and are classifiable, in particular in subclasses 145+, especially indented subclass 147, for such combinations with coil length or connection changing means, and subclasses 180+ for such combinations where no inductance adjusting means is claimed.
SEE OR SEARCH THIS CLASS, SUBCLASS:
5+, for inductors having polyphase windings.
73+, 115+, for inductors having two or more relatively movable coils, each coil acting as a separate winding.
130+, for inductors having relatively movable core and coil means, wherein the coil means may be two or more windings. In particular, indented subclass 131 provides for plural coils (or windings) with plural cores. 137+, for inductors with means to change coil length or connections and wherein two or more coils constituting separate windings may be included (see (1) Note, above).
155+, for saturable core or high leakage reactance type inductors, especially subclasses 160+ for transformers with primary and secondary windings with a magnetic shunt therebetween.
170+, for inductors with three or more windings.
173+, for inductors with at least two coils or windings which are physically interlinked.
180+, for inductors with at least one winding formed of plural coils, particularly subclasses 182+, for plural windings at least one of which is formed of plural coils. See also the reference to subclasses 180+ in (1) Note above.
188, for inductors having plural windings with mutually crossed turns.
195, for inductors wherein a coil or winding is supported within the grooved or hollow conductor of another coil or winding.
199+, for inductors having particular coil turn or coil or winding supports or spacers.
SEE OR SEARCH CLASS
178, Telegraphy,
43, for systems utilizing plural windings for transmitting and receiving telegraph signals through appreciable space by
means of an inductive field, subclass 49 for transformers or reactors utilized for superposed current signaling and subclass 64 for coil transformers employed in telegraph systems. 191, Electricity: Transmission to Vehicles,
10, for inductively coupled means comprising a winding mounted on one body and another winding mounted on another body, the bodies being relatively movable, electric power being transmitted from one winding to the other wholly through the induction field.
219, Electric Heating,
50+, especially subclass 116, for metal heating systems utilizing plural winding transformers.
246, Railway Switches and Signals,
8, and 29 for railway signaling systems utilizing transmitting and receiving windings mutually coupled through appreciable space by means of the induction field.
307, Electrical Transmission or Interconnection Systems, appropriate subclasses for miscellaneous electrical systems using plural winding inductors, note particularly
7, 17, and 83 for systems utilizing transformers.
310, Electrical Generator or Motor Structure,
10+, for dynamoelectric machine structure, especially subclasses 179+ for winding and core structure, indented subclasses 184+ being directed to plural field windings and indented subclasses 198+ to plural armature or primary windings.
313, Electric Lamp and Discharge Devices, particularly
62, and 153+, 413, 421+, 442 for coil structures which may involve plural windings, combined with electric lamps and space discharge devices. 315, Electric Lamp and Discharge Devices: Systems, appropriate subclasses for lamp and space discharge device systems utilizing inductors which may have plural windings, particularly
4+, 27, 39, 40, 41+, 50, 54, 70, 141+, 177, 206, 212+, 219+, 239, 254+, 262, 266, 274, 276+, 354, 368.28, and 382.
318, Electricity: Motive Power Systems, appropriate subclasses for electric motors and control systems therefor including plural windings inductors.
322, Electricity: Single Generator Systems, appropriate
subclasses for single electrical generators and control systems therefor including plural winding inductors.
323, Electricity: Power Supply or Regulation Systems,
206, 214, 215+, 232, 247+, 301+, and 328+ for systems employing transformers or other plural winding inductors.
324, Electricity: Measuring and Testing,
55, for transformer testing systems, subclass 59 for inductance measuring systems and subclass 127 for measuring systems with coupling transformers.
333, Wave Transmission Lines and Networks, particularly
100+, and 24+ for electric wave coupling systems including plural winding inductors, note especially subclasses 177+ for transformer coupled wave filters.
334, Tuners, appropriate subclasses for tuners which may employ inductors with plural windings. 335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,
289+, for structure of electromagnets of the holding, lifting or tractive type.
340, Communications: Electrical, especially
870.31+, for plural winding inductors employed in telemetering systems.
343, Communications: Radio Wave Antennas,
855, for plural loop type antennas with a coupling network; and subclass 867 for plural loop type antennas including plural or tapped coils.
361, Electricity: Electrical Systems and Devices,
35+, for transformer protection circuits, subclasses 139+ for electric circuits for relays or electromagnets which may be of the plural winding type.
363, Electric Power Conversion Systems, appropriate subclasses for current, frequency, or phase conversion systems utilizing plural winding inductors, particularly
5, 64, 152+, and 170+ for systems with transformers.
379, Telephonic Communications, particularly
443, for induction coils combined with telephones, subclass 55.1 for separate windings inductively coupled through appreciable space to transmit and receive telephone signals, and appropriate subclasses for induction coils restricted to use in telephone systems.
