G
SECTION G — PHYSICS
  
INSTRUMENTS
 G05
CONTROLLING; REGULATING (specially adapted to a particular field of use, see the relevant subclass for that field, e.g. B23Q)
 G05

Note(s)

  1. This class covers methods, systems, and apparatus for controlling, in general.
  2. In this class, the following terms or expressions are used with the meanings indicated:
    • "controlling" means influencing a variable in any way, e.g. changing its direction or its value (including changing it to or from zero), maintaining it constant, limiting its range of variation;
    • "regulation" means maintaining a variable automatically at a desired value or within a desired range of values. The desired value or range may be fixed, or manually varied, or may vary with time according to a predetermined "programme" or according to variation of another variable. Regulation is a form of control;
    • "automatic control" is often used in the art as a synonym for "regulation".
  3. Attention is drawn to the Notes following the title of section G, especially as regards the definition of the term "variable".
 G05B
CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS (fluid-pressure actuators or systems acting by means of fluids in general F15B; valves per se F16K; characterised by mechanical features only G05G; sensitive elements, see the appropriate subclasses, e.g. G12B, subclasses of G01, H01; correcting units, see the appropriate subclasses, e.g. H02K)
 G05B

Note(s)

  1. This subclass covers features of control systems or elements for regulating specific variables, which are clearly more generally applicable.
  2. This subclass does not cover applications of such systems or elements, which are covered by subclass G05D or G05F.
  3. In this subclass, the following terms or expressions are used with the meanings indicated:
    • "automatic controller" means a system, circuit, or device in which a signal from the detecting element is compared with a signal representing the desired value and which operates in such a way as to reduce the deviation. The automatic controller generally does not include the sensitive element, i.e. that element which measures the value of the condition to be corrected, or the correcting element, i.e. that element which adjusts the condition to be corrected;
    • "electric" includes "electromechanical", "electrohydraulic" or "electropneumatic".
  4. In this subclass, details of specific control systems are classified in the group relevant to the system, if not otherwise provided for.

 G05D
SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES (for continuous casting of metals B22D 11/16; valves per se F16K; sensing non-electric variables, see the relevant subclasses of G01; for regulating electric or magnetic variables G05F)
 G05D

Note(s)

  1. This subclass does not cover features of general applicability to regulating systems, e.g. anti-hunting arrangements, which are covered by subclass G05B.
  2. In this subclass, the following term is used with the meaning indicated:
    • "systems" includes self-contained devices such as speed governors, pressure regulators.
  3. Control systems designed specifically for particular apparatus, machines, or processes are classified in the subclasses for the apparatus, machines, or processes, provided that:
    1. thereis specific provision there for the control aspect, and
    2. the apparatus, machines, or processes are described in detail.

 G05F
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 electric power distribution networks H02J; regulating the charging of batteries H02J 7/00; regulating 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)
 G05F

Note(s)

  1. This subclass covers:
    • systems only;
    • use of hydraulic, 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.
  2. This subclass does not cover elements per se, which are covered by the relevant subclasses.

 G05G
CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY ("Bowden" or like mechanisms F16C 1/10; gearings or mechanisms not peculiar to this purpose F16H; systems peculiar to the control of particular machines or apparatus classified in a single other class, see the relevant class for such machines or apparatus)
 G05G

Note(s)

This subclass covers:

  • members of general applicability for mechanical control;
  • mechanical systems for moving members to one or more definite settings.