US PATENT SUBCLASS 363 / 120
.~.~ In inverter systems


Current as of: June, 1999
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363 /   HD   ELECTRIC POWER CONVERSION SYSTEMS

13  DF  CURRENT CONVERSION {25}
111  DF  .~ Using electronic tube converter {4}
120.~.~ In inverter systems {1}
121  DF  .~.~.~> With discharge control means (e.g., grid) {1}


DEFINITION

Classification: 363/120

In inverter systems:

(under subclass 111) Subject matter wherein the conversion is from D.C. to A.C.

(1) Note. There are many conversion systems for converting D.C. to A.C. in the communications arts, (e.g., oscillators, harmonic generators, amplifiers, etc.). See the class definition, Lines With Other Classes, for a list of conversion systems excluded from this class, their classification and the lines between them and the subject matter of this class.

SEE OR SEARCH THIS CLASS, SUBCLASS:

9, for circuit interrupter type inverter systems.

29+, for electron tube inverter in D.C.-A.C.-D.C. systems.

38, for electron tube inverter in A.C.-D.C.-A.C. systems.

95+, for electron tube inverting systems with means to control the output voltage or current.

131+, and 135+, for transistor and thyristor type inverter systems. SEE OR SEARCH CLASS

315, Electric Lamp and Discharge Devices: Systems, appropriate subclasses for systems for supplying electric current to electronic tubes of the gas or vapor type. Many of these systems inherently operative to convert D.C. to A.C. and are closely analogous to the systems in this and the indented subclass. Note especially

227+, where a condenser is used to control the supply of current to the electronic tube. In many of these systems the condenser causes the current through the tube to flow periodically, similar to the current flow in a relaxation oscillator circuit. Note especially indented subclass 229 where the system includes a plurality of tubes and a

commutating condenser is connected between the anodes or cathodes to cause the tubes to become conductive alternately (converts D.C. to A.C.). See subclass 235 where the electronic tube has a plurality of cathodes or anodes with a commutating condenser connected between the anodes or cathodes to cause the discharge to alternate between the plural cathodes or anodes (converts D.C. to A.C.). See the class definition, Lines With Other Classes, for the line between Classes 315 and 363.

331, Oscillators, appropriate subclasses for self-sustaining electric wave generating systems utilizing electronic tubes which convert direct current to alternating current.