Attention is drawn to the notes (particularly the definition of the term "variable") on page 1 of this elaboration.
This class covers methods, systems, and apparatus for controlling in general.
In this class, the following terms 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; the term "automatic control" is often used in the art as a synonym for "regulation".
"Proportional band" means that range of values of deviation which corresponds to the full operating range of output signal of the controlling unit resulting from proportional action only.
This sub-class includes the use of hydraulic, pneumatic, mechanical, and electrical motors for varying electric characteristics of devices which restore the quantity regulated.
This sub-class is restricted to systems, the elements per se being in the relevant sub-classes.
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
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 as final control devices; using semiconductor devices as final control devices
G05F 1/42
· · · ·
discharge tubes only
G05F 1/44
· · · ·
semiconductor devices only
G05F 1/46
· ·
wherein the variables 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 1/62
· · ·
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 Fulltext... Hierarchy... Expanded...H02P)
G05F 1/66
·
Regulating electric power
G05F 1/68
·
Regulating power factor; Regulating reactive current
G05F 3/00
Non-retroactive systems for regulating electric variables by using an uncontrolled elements 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
· · · ·
glow discharge tubes
G05F 3/14
· · · ·
zener diodes; uncontrolled semiconductor devices
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