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

Note(s)

  1. Attention is drawn to the notes (particularly the definition of the term "variable") on page 7 of this Section.
  2. This class covers methods, systems, and apparatus for controlling in general.
  3. In this class, the following terms are used with the meanings indicated:
    1. "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.
    2. "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; the term "automatic control" is often used in the art as a synonym for "regulation".
 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 current supply in networks H02J; regulating the charging of batteries H02J 7/00; regulating motor current H02N, H02P; 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 sub-class includes the use of hydraulic, pneumatic, mechanical, and electrical motors for varying electric characteristics of devices which restore the quantity regulated.
  2. This sub-class is restricted to systems, the elements per se being in the relevant sub-classes.
  3. The regulation of the output, e.g. frequency, phase, amplitude, of electric generators, converters, or transformers is dealt with in H02N, H02P 9/00, H02P 13/00, H03L.
 G05F 1/00
Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
 G05F 1/02
·  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)  [2]
 G05F 1/04
·  ·  by means of saturable magnetic devices
 G05F 1/06
·  ·  by means of discharge tubes
 G05F 1/08
·  ·  by means of semiconductor devices
 G05F 1/10
·  Regulating voltage or current (G05F 1/02 takes precedence; for electric railways B60M 3/02)
 G05F 1/12
·  ·  wherein the variable is ac
 G05F 1/14
·  ·  ·  using tap transformers or variable inductors as final control devices
 G05F 1/16
·  ·  ·  ·  combined with discharge tubes or semiconductor devices
 G05F 1/18
·  ·  ·  ·  ·  discharge tubes only
 G05F 1/20
·  ·  ·  ·  ·  semiconductor devices only
 G05F 1/22
·  ·  ·  ·  combined with separate magnetic control devices having a controllable degree of saturation
 G05F 1/24
·  ·  ·  using bucking or boosting transformers as final control devices
 G05F 1/26
·  ·  ·  ·  combined with discharge tubes or semiconductor devices
 G05F 1/28
·  ·  ·  ·  ·  discharge tubes only
 G05F 1/30
·  ·  ·  ·  ·  semiconductor devices only
 G05F 1/32
·  ·  ·  using magnetic devices having a controllable degree of saturation as final control devices
 G05F 1/34
·  ·  ·  ·  combined with discharge tubes or semiconductor devices
 G05F 1/36
·  ·  ·  ·  ·  discharge tubes only
 G05F 1/38
·  ·  ·  ·  ·  semiconductor devices only
 G05F 1/40
·  ·  ·  using discharge tubes or semiconductor devices as final control devices
 G05F 1/42
·  ·  ·  ·  discharge tubes only
 G05F 1/44
·  ·  ·  ·  semiconductor devices only
 G05F 1/445
·  ·  ·  ·  ·  being transistors in series with the load  [3]
 G05F 1/45
·  ·  ·  ·  ·  being controlled rectifiers in series with the load  [3]
 G05F 1/455
·  ·  ·  ·  ·  ·  with phase control  [3]
 G05F 1/46
·  ·  wherein the variable is dc
 G05F 1/48
·  ·  ·  using variable impedances as final control devices
 G05F 1/50
·  ·  ·  ·  in series with the load
 G05F 1/52
·  ·  ·  ·  ·  being discharge tubes
 G05F 1/54
·  ·  ·  ·  ·  ·  additionally controlled by the unregulated supply
 G05F 1/56
·  ·  ·  ·  ·  being semiconductor devices
 G05F 1/58
·  ·  ·  ·  ·  ·  combined with overload protection; combined with temperature compensation
 G05F 1/60
·  ·  ·  ·  in parallel with the load
 G05F 1/607
·  ·  ·  ·  ·  being discharge tubes  [3]
 G05F 1/613
·  ·  ·  ·  ·  being semiconductor devices  [3]
 G05F 1/62
·  ·  ·  using bucking or boosting dc sources
 G05F 1/64
·  ·  wherein the variable is dc and there is conversion between the unregulated supply and the regulated output to the load (regulating converters H02P)
 G05F 1/66
·  Regulating electric power
 G05F 1/68
( transferred to G05F 1/70 )
 G05F 1/70
·  Regulating power factor; Regulating reactive current or power  [3]
 G05F 3/00
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
 G05F 3/02
·  Regulating voltage or current
 G05F 3/04
·  ·  wherein the variable is ac
 G05F 3/06
·  ·  ·  using combinations of saturated and unsaturated inductive devices, e g. combined with resonant circuit
 G05F 3/08
·  ·  wherein the variable is dc
 G05F 3/10
·  ·  ·  using non-linear resistors
 G05F 3/12
·  ·  ·  ·  being glow discharge tubes
 G05F 3/14
( transferred to G05F 3/16 )
 G05F 3/16
·  ·  ·  ·  being uncontrolled semiconductor devices  [3]
 G05F 3/18
·  ·  ·  ·  ·  using Zener diodes  [3]
 G05F 3/20
·  ·  ·  ·  ·  using diode-transistor combinations (G05F 3/18 takes precedence)  [3]
 G05F 5/00
Systems for regulating electric variables by detecting deviations in the electric input to the system and thereby controlling a device within the system to obtain a regulated output
 G05F 7/00
Regulating magnetic variables