CPC Definition - Subclass G05F

Last Updated Version: 2025.01
SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
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
Application-oriented references

Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Regulation of current or voltage specially adapted for use in electronic time-pieces

G04G 19/02

Regulating power supply of digital computers

G06F 1/26

Circuit arrangements for obtaining desired operating characteristics of electromagnets with armatures

H01F 7/18

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

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

Controlling generators of electronic oscillations or pulses

H03L

Regulating characteristics of transmission lines

H04B

Controlling electric light sources

H05B 39/04, H05B 41/36, H05B 45/10, H05B 45/20, H05B 47/10

Electric control of X-ray apparatus

H05G 1/30

Informative references

Attention is drawn to the following places, which may be of interest for search:

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 electric characteristics of arcs
References
Application-oriented references

Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Automatic control of power for heating by discharge

H05B 7/148

Informative references

Attention is drawn to the following places, which may be of interest for search:

Arrangements for feeding or moving of electrodes for spot or seam welding or cutting

B23K 9/12

Arrangements for feeding electrodes for electric heating or electric lighting

H05B 7/109, H05B 31/18

Regulating voltage or current  (G05F 1/02 takes precedence)
References
Limiting references

This place does not cover:

Regulating electric characteristics of arcs

G05F 1/02

Application-oriented references

Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Regulating voltage or current in electric railways

B60M 3/02

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

H03F

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

H03L 7/0891

wherein the variable is DC
References
Limiting references

This place does not cover:

Regulation using uncontrolled devices with non-linear characteristics

G05F 3/10

Substrate bias-voltage generators for static stores

G11C 5/146

Regulating magnetic variables
References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Details of apparatus for measuring magnetic variables involving magnetic resonance

G01R 33/28