Cooperative Patent Classification

CPC Definition - Subclass G05F

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Last Updated Version: 2016.11
SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES (regulating the timing or recurrence frequency of pulses in radar or radio navigation systems G01S; closed-loop systems for regulating non-electric variables by electric means G05D; regulating power supply of digital computers G06F 1/26; regulating electric power distribution networks H02J; regulating the charging of batteries H02J 7/00; regulation of the output of static converters, e.g. switching regulators H02M; regulation of the output of electric generators H02N, H02P 9/00, H03L; controlling transformers, reactors or choke coils H02P 13/00; regulating frequency response, gain, maximum output, amplitude or bandwidth of amplifiers H03G; regulating tuning of resonant circuits H03J; regulating characteristics of transmission lines H04B; electric control of X-ray apparatus H05G 1/30)
Definition statement

This place covers:

Systems only;

Use of hydraulics, pneumatic, mechanical and electrical motors for varying electric characteristics of devices which restore the quantity regulated;

The combination of static converters and current or voltage regulators, if the invention resides in the combination.

References
Limiting references

This place does not cover:

Regulating the timing or recurrence frequency of pulses in radar or radio navigation systems

Closed-loop systems for regulating non-electric variables by electric means

Regulating power supply of digital computers

Regulating electric power distribution networks

Regulating the charging of batteries

Regulation of the output of static converters, e.g. switching regulators

Regulation of the output of electric generators

Controlling transformers, reactors or choke coils

Regulating frequency response, gain, maximum output, amplitude or bandwidth of amplifiers

Regulating tuning of resonant circuits

Regulating characteristics of transmission lines

Electric control of X-ray apparatus

Regulating electric characteristics of arcs (arrangements for feeding electrodes B23K 9/12, H05B 7/109, H05B 31/18; automatic control of power for heating by discharge H05B 7/148)
References
Limiting references

This place does not cover:

Arrangements for feeding electrodes

Automatic control of power for heating by discharge

Regulating voltage or current (G05F 1/02 takes precedence; for electric railways B60M 3/02)
References
Limiting references

This place does not cover:

Regulating voltage or current for electric railways

wherein the variable actually regulated by the final control device is dc (G05F 1/625 takes precedence)
References
Limiting references

This place does not cover:

Voltage to current converters for amplifiers

Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties {(current generators specially designed for use in phase-locked loops H03L 7/0891)}
References
Limiting references

This place does not cover:

Current generators specially designed for use in phase-locked loops

wherein the variable is dc
References
Limiting references

This place does not cover:

Regulation using uncontrolled devices with non-linear characteristics

Substrate bias-voltage generators for static stores

Regulating magnetic variables (details of apparatus for measuring magnetic variables involving magnetic resonance G01R 33/28)
References
Limiting references

This place does not cover:

Details of apparatus for measuring magnetic variables involving magnetic resonance