|  | G |
SECTION G — PHYSICS

|  | G |
Note(s) In this section, the following term is used with the meaning indicated: "variable" (as a noun) means a feature or property (e.g., a dimension, a physical condition such as temperature, a quality such as density or colour) which, in respect of a particular entity (e.g., an object, a quantity of a substance, a beam of light) and at a particular instant, is capable of being measured; the variable may change, so that its numerical expression may assume different values at different times, in different conditions or in individual cases, but may be constant in respect of a particular entity in certain conditions or for practical purposes (e.g., the length of a bar may be regarded as constant for many purposes). Attention is drawn to the definitions of terms or expressions used, appearing in the notes of several of the classes in this section, in particular those of "measuring" in class Fulltext... Hierarchy... Expanded...G01 and "control" and "regulation" in class Fulltext... Hierarchy... Expanded...G05. Classification in this section may present more difficulty than in other sections, because the distinction between different fields of use rests to a considerable extent on differences in the intention of the user rather than on any constructional differences or differences in the manner of use, and because the subjects dealt with are often in effect systems or combinations, which have features or parts in common, rather than "things", which are readily distinguishable as a whole. For example, information (e.g., a set of figures) may be displayed for the purpose of education or advertising (Fulltext... Hierarchy... Expanded...G09), for enabling the result of a measurement to be known (Fulltext... Hierarchy... Expanded...G01), for signalling the information to a distant point or for giving information which has been signalled from a distant point (Fulltext... Hierarchy... Expanded...G08). The words used to describe the purpose depend on features that may be irrelevant to the form of the apparatus concerned, for example, such features as the desired effect on the person who sees the display, or whether the display is controlled from a remote point. Again, a device which responds to some change in a condition, e.g., in the pressure of a fluid, may be used, without modification of the device itself, to give information about the pressure (Fulltext... Hierarchy... Expanded...G01L) or about some other condition linked to the pressure (another subclass of class Fulltext... Hierarchy... Expanded...G01, e.g., Fulltext... Hierarchy... Expanded...G01K for temperature), to make a record of the pressure or of its occurrence (Fulltext... Hierarchy... Expanded...G07C), to give an alarm (Fulltext... Hierarchy... Expanded...G08B), or to control another apparatus (Fulltext... Hierarchy... Expanded...G05). The classification scheme is intended to enable things of a similar nature (as indicated above) to be classified together. It is therefore particularly necessary for the real nature of any technical subject to be decided before it can be properly classified.

INSTRUMENTS

|  | G05 |
CONTROLLING; REGULATING (specially adapted to a particular field of use, see the relevant place for that field, e.g. Fulltext... Hierarchy... Expanded...A62C 37/00, Fulltext... Hierarchy... Expanded...B03B 13/00, Fulltext... Hierarchy... Expanded...B23Q)

|  | G05 |
Note(s) This class covers methods, systems, and apparatus for controlling, in general. 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". 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 Fulltext... Hierarchy... Expanded...F15B; valves per se Fulltext... Hierarchy... Expanded...F16K; characterised by mechanical features only Fulltext... Hierarchy... Expanded...G05G; sensitive elements, see the appropriate subclasses, e.g. Fulltext... Hierarchy... Expanded...G12B, subclasses of Fulltext... Hierarchy... Expanded...G01, Fulltext... Hierarchy... Expanded...H01; correcting units, see the appropriate subclasses, e.g. Fulltext... Hierarchy... Expanded...H02K)

|  | G05B |
Note(s) This subclass covers features of control systems or elements for regulating specific variables, which are clearly more generally applicable. This subclass does not cover applications of such systems or elements, which are covered by subclass Fulltext... Hierarchy... Expanded...G05D or Fulltext... Hierarchy... Expanded...G05F. 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". In this subclass, details of specific control systems are classified in the group relevant to the system, if not otherwise provided for.

|  | G05B |
Subclass index
CONTROL SYSTEMS |
Adaptive | 13/00
Controlled by computer | 15/00
Involving the use of models or simulators | 17/00
Controlled by programme | 19/00
Involving sampling | 21/00
Open-loop automatic control systems not otherwise provided for | 24/00
SYSTEM DETAILS |
Comparing elements | 1/00
Anti-hunting arrangements | 5/00
Internal feedback arrangements | 6/00
Obtaining smooth engagement or disengagement of automatic control | 7/00
Safety arrangements | 9/00
Automatic controllers | 11/00
TESTING, MONITORING | 23/00

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

|  | G05D |
3. Note(s) This subclass does not cover features of general applicability to regulating systems, e.g. anti-hunting arrangements, which are covered by subclass Fulltext... Hierarchy... Expanded...G05B. In this subclass, the following term is used with the meaning indicated: "systems" includes self-contained devices such as speed governors, pressure regulators. Control systems specially adapted for particular apparatus, machines or processes are classified in the subclasses for the apparatus, machines or processes, provided that there is specific provision for control or regulation relevant to the special adaptation, either at a detailed level (e.g. Fulltext... Hierarchy... Expanded...A21B 1/40: "for regulating temperature in bakers' ovens") or at a general level (e.g. Fulltext... Hierarchy... Expanded...B23K 9/095: "for automatic control of welding parameters in arc welding"). Otherwise, classification is made in the most appropriate place in this subclass. The following are lists of places where there is specific provision of the kind referred to above. Where such provision is at a detailed level, the places have been grouped according to the main groups of this subclass. Where the provision is at a general level (e.g. of a kind appropriate to more than one of the main groups specified in the lists, or to main groups Fulltext... Hierarchy... Expanded...G05D 27/00 or Fulltext... Hierarchy... Expanded...G05D 29/00), the places are listed under the title "General References". Places related to Fulltext... Hierarchy... Expanded...G05D 1/00
   Fulltext... Hierarchy... Expanded...A01B 69/00 | Agricultural machines or implements |
   Fulltext... Hierarchy... Expanded...A63H 17/36 | Toy vehicles |
   Fulltext... Hierarchy... Expanded...B60V 1/11 | Air-cushion vehicles |
   Fulltext... Hierarchy... Expanded...B62D 1/00 | Steering controls of motor vehicles or trailers, i.e. means for initiating a change of direction |
   Fulltext... Hierarchy... Expanded...B62D 6/00 | Arrangements for automatically controlling the steering depending on driving conditions |
   Fulltext... Hierarchy... Expanded...B62D 55/116 | Chassis of endless-tracked vehicles |
   Fulltext... Hierarchy... Expanded...B63H 25/00 | Marine steering; control of waterborne vessels |
   Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...B64C 13/00-B64C 15/00 | Controlling aircraft |
   Fulltext... Hierarchy... Expanded...B64D 25/11 | Controlling attitude or direction of aircraft ejector seats |
   Fulltext... Hierarchy... Expanded...B64G 1/24 | Cosmonautic vehicles |
   Fulltext... Hierarchy... Expanded...F41G 7/00 | Self-propelled missiles |
   Fulltext... Hierarchy... Expanded...F42B 15/01 | Guided missiles |
   Fulltext... Hierarchy... Expanded...F42B 19/01 | Marine torpedoes |
   Places related to Fulltext... Hierarchy... Expanded...G05D 3/00
   Fulltext... Hierarchy... Expanded...A43D 119/00 | Footwear manufacture |
   Fulltext... Hierarchy... Expanded...B21K 31/00 | Tool carriers in forging or pressing |
   Fulltext... Hierarchy... Expanded...B23B 39/26 | Pattern-controlled boring or drilling tools |
   Fulltext... Hierarchy... Expanded...B23D 1/30, Fulltext... Hierarchy... Expanded...B23D 3/06, Fulltext... Hierarchy... Expanded...B23D 5/04 | Planing or slotting machines controlled by copying device |
   Fulltext... Hierarchy... Expanded...B23H 7/18 | Electrode to workpiece spacing in electric discharge and electrochemical machining |
   Fulltext... Hierarchy... Expanded...B23K 26/02 | Workpiece in laser welding or cutting |
   Fulltext... Hierarchy... Expanded...B23K 37/04 | Workpiece in welding |
   Fulltext... Hierarchy... Expanded...B23K 37/06 | Molten metal in welding |
   Fulltext... Hierarchy... Expanded...B23Q 5/20 | Spindles in machine tools |
   Fulltext... Hierarchy... Expanded...B23Q 15/00, Fulltext... Hierarchy... Expanded...B23Q 16/00 | Tool or work position in machine tools |
   Fulltext... Hierarchy... Expanded...B23Q 35/00 | Tools controlled by pattern or master model |
   Fulltext... Hierarchy... Expanded...B24B 17/00 | Grinding controlled by patterns, drawings, magnetic tape or the like |
   Fulltext... Hierarchy... Expanded...B24B 47/22 | Starting position in grinding |
   Fulltext... Hierarchy... Expanded...B30B 15/24 | Actuating members in presses |
   Fulltext... Hierarchy... Expanded...B62D 55/116 | Chassis of tracked vehicles |
   Fulltext... Hierarchy... Expanded...B65H 23/18 | Web-advancing mechanisms |
   Fulltext... Hierarchy... Expanded...E02F 3/43 | Dippers or buckets in dredgers |
   Fulltext... Hierarchy... Expanded...F15B 9/00 | Fluid-pressure servomotors with follow-up action |
   Fulltext... Hierarchy... Expanded...F24J 2/38 | Tracking of solar heat collectors |
   Fulltext... Hierarchy... Expanded...G03F 9/00 | Photomechanical production of patterned or textured surfaces |
   Fulltext... Hierarchy... Expanded...G11B 5/588 | Rotating heads in information storage systems |
   Fulltext... Hierarchy... Expanded...G21C 7/12 | Movement of control elements in nuclear reactors |
   Places related to Fulltext... Hierarchy... Expanded...G05D 5/00
   Fulltext... Hierarchy... Expanded...A24B 7/14 | Tobacco cutting |
   Fulltext... Hierarchy... Expanded...B05C 11/02 | Thickness of coating of fluent material on surface |
   Fulltext... Hierarchy... Expanded...B21B 37/16 | Thickness, width, diameter or other transverse dimensions of the products of metal-rolling mills |
   Fulltext... Hierarchy... Expanded...C03B 18/04 | Dimension of glass ribbon |
   Fulltext... Hierarchy... Expanded...D21F 7/06 | Thickness of layer in paper making |
   Places related to Fulltext... Hierarchy... Expanded...G05D 7/00
   Fulltext... Hierarchy... Expanded...A45D 20/26 | Air in hair drying helmets |
   Fulltext... Hierarchy... Expanded...A61M 5/168 | Flow of media to the human body |
   Fulltext... Hierarchy... Expanded...B03C 3/36 | Gases or vapour in electrostatic separators |
   Fulltext... Hierarchy... Expanded...B05C 11/10 | Fluent material in coating devices |
   Fulltext... Hierarchy... Expanded...B67D 1/12 | Dispensing beverages on draught |
   Fulltext... Hierarchy... Expanded...B67D 5/28 | Transferring liquids |
   Fulltext... Hierarchy... Expanded...C10K 1/28 | Gas purifiers |
   Fulltext... Hierarchy... Expanded...E21B 21/08 | Flushing boreholes |
   Fulltext... Hierarchy... Expanded...E21B 43/12 | Obtaining liquids from wells |
   Fulltext... Hierarchy... Expanded...F01D 17/00 | Flow in non-positive-displacement machines or systems |
   Fulltext... Hierarchy... Expanded...F01M 1/16 | Lubrication arrangements |
   Fulltext... Hierarchy... Expanded...F01P 7/00 | Coolant flow in cooling devices |
   Fulltext... Hierarchy... Expanded...F02C 9/16, Fulltext... Hierarchy... Expanded...F02C 9/50 | Gas-turbine working fluid |
   Fulltext... Hierarchy... Expanded...F16L 55/027 | Throttle passages in pipes |
   Fulltext... Hierarchy... Expanded...F24F 11/00 | Air-flow or supply of heating or cooling fluids in air treatment arrangements |
   Fulltext... Hierarchy... Expanded...F26B 21/12 | Air or gas flow in dryers |
   Fulltext... Hierarchy... Expanded...G01G 11/08 | Continuous flow weighing apparatus |
   Fulltext... Hierarchy... Expanded...G21D 3/14 | Coolant in nuclear power plant |
   Places related to Fulltext... Hierarchy... Expanded...G05D 9/00
   Fulltext... Hierarchy... Expanded...B01D 21/34 | Liquid level in sedimentation arrangements |
   Fulltext... Hierarchy... Expanded...B41L 27/04 | Ink level in printing, manifolding or duplicating arrangements |
   Fulltext... Hierarchy... Expanded...F22D 5/00 | Feed water for boilers |
   Fulltext... Hierarchy... Expanded...H01J 1/10, Fulltext... Hierarchy... Expanded...H01J 13/14 | Liquid pool electrodes in electric discharge tubes or lamps |
   Places related to Fulltext... Hierarchy... Expanded...G05D 11/00
   Fulltext... Hierarchy... Expanded...B01D 21/32 | Density in sedimentation arrangements |
   Fulltext... Hierarchy... Expanded...B01F 15/04 | Mixers |
   Fulltext... Hierarchy... Expanded...B24C 7/00 | Abrasive blasts |
   Fulltext... Hierarchy... Expanded...B28C 7/00 | Mixtures of clays or cements |
   Fulltext... Hierarchy... Expanded...B65G 53/66 | Bulk material conveyers |
   Fulltext... Hierarchy... Expanded...F02K 3/075 | Flow ratio in jet-propulsion plants |
   Places related to Fulltext... Hierarchy... Expanded...G05D 13/00
   Fulltext... Hierarchy... Expanded...B21C 1/12 | Drum speed in metal drawing |
   Fulltext... Hierarchy... Expanded...B23Q 15/00 | Cutting velocity of tool or work |
   Fulltext... Hierarchy... Expanded...B30B 15/20 | Ram speed in presses |
   Fulltext... Hierarchy... Expanded...B60K 31/00 | Setting or limiting speed of vehicles |
   Fulltext... Hierarchy... Expanded...B60L 15/00 | Electrically-propelled vehicles |
   Fulltext... Hierarchy... Expanded...B64D 31/08 | Cruising speed of aircraft |
   Fulltext... Hierarchy... Expanded...D01D 1/09 | Feed rate in manufacture of artificial filaments, threads, fibres, bristles or ribbons |
   Fulltext... Hierarchy... Expanded...D01G 15/36 | Carding machines |
   Fulltext... Hierarchy... Expanded...D02H 13/14 | Warping, beaming or leasing machines |
   Fulltext... Hierarchy... Expanded...D03D 51/16 | Cyclically varying speed of looms |
   Fulltext... Hierarchy... Expanded...G01N 30/32 | Speed of fluid carrier in chemical analysis |
   Fulltext... Hierarchy... Expanded...G11B 15/46 | Filamentary or web record carriers or heads for such carriers in information storage systems |
   Fulltext... Hierarchy... Expanded...G11B 19/28 | Non-filamentary, non-web record carriers, or heads for such carriers in information storage systems |
   Places related to Fulltext... Hierarchy... Expanded...G05D 15/00
   Fulltext... Hierarchy... Expanded...B25D 9/26 | Portable percussive tools |
   Fulltext... Hierarchy... Expanded...B30B 15/22 | Ram pressure in presses |
   Fulltext... Hierarchy... Expanded...B65H 59/00 | Tension in filamentary material |
   Fulltext... Hierarchy... Expanded...B65H 77/00 | Tension in webs, tapes, filamentary material |
   Fulltext... Hierarchy... Expanded...B66D 1/50 | Rope, cable or chain tension |
   Fulltext... Hierarchy... Expanded...D03D 49/04 | Tension in looms |
   Fulltext... Hierarchy... Expanded...D05B 47/04 | Tension in sewing machines |
   Fulltext... Hierarchy... Expanded...D21F 3/06 | Pressure in paper-making machines |
   Fulltext... Hierarchy... Expanded...F26B 13/12 | Drying fabrics |
   Fulltext... Hierarchy... Expanded...F26B 21/10 | Pressure in dryers |
   Fulltext... Hierarchy... Expanded...G11B 15/43 | Record carrier tension in information storage arrangements |
   Places related to Fulltext... Hierarchy... Expanded...G05D 16/00
   Fulltext... Hierarchy... Expanded...B60C 23/00 | Tyre pressure |
   Fulltext... Hierarchy... Expanded...B63C 11/08 | Air within diving suit |
   Fulltext... Hierarchy... Expanded...B64D 13/00 | Aircraft air-pressure |
   Fulltext... Hierarchy... Expanded...B65G 53/66 | Bulk material conveyers |
   Fulltext... Hierarchy... Expanded...D01D 1/09 | Manufacture of artificial filaments, threads, fibres, bristles or ribbons |
   Fulltext... Hierarchy... Expanded...E21B 21/08 | Flushing boreholes |
   Fulltext... Hierarchy... Expanded...F01M 1/16 | Lubrication arrangements |
   Fulltext... Hierarchy... Expanded...G01N 30/32 | Pressure of fluid carrier in chemical analysis |
   Fulltext... Hierarchy... Expanded...H01J 7/14 | Pressure in electric discharge tubes or lamps |
   Fulltext... Hierarchy... Expanded...H01K 1/52 | Pressure in electric incandescent lamps |
   Places related to Fulltext... Hierarchy... Expanded...G05D 19/00
   Fulltext... Hierarchy... Expanded...B25D 9/26 | Portable percussion tools |
   Fulltext... Hierarchy... Expanded...B65G 27/32 | Jigging conveyers |
   Places related to Fulltext... Hierarchy... Expanded...G05D 21/00
   Fulltext... Hierarchy... Expanded...B01D 21/32 | Density in sedimentation arrangements |
   Fulltext... Hierarchy... Expanded...B01D 53/30 | Treating gases or vapours |
   Fulltext... Hierarchy... Expanded...G01N 30/34 | Composition of fluid carrier in chemical analysis |
   Places related to Fulltext... Hierarchy... Expanded...G05D 22/00
   Fulltext... Hierarchy... Expanded...A01G 25/16 | Watering gardens, fields, sports grounds or the like |
   Fulltext... Hierarchy... Expanded...A01K 41/04 | Poultry incubators |
   Fulltext... Hierarchy... Expanded...A24B 9/00 | Tobacco products |
   Fulltext... Hierarchy... Expanded...F24F 11/00 | Air conditioning |
   Fulltext... Hierarchy... Expanded...F26B 21/08 | Dryers |
   Places related to Fulltext... Hierarchy... Expanded...G05D 23/00
   Fulltext... Hierarchy... Expanded...A21B 1/40 | Bakers' ovens |
   Fulltext... Hierarchy... Expanded...A45D 6/20 | Hair curlers |
   Fulltext... Hierarchy... Expanded...B21C 31/00 | Metal extruding |
   Fulltext... Hierarchy... Expanded...B60C 23/00 | Tyre temperature |
   Fulltext... Hierarchy... Expanded...B64G 1/50 | Cosmonautic vehicles |
   Fulltext... Hierarchy... Expanded...C03B 18/18, Fulltext... Hierarchy... Expanded...C03B 18/22 | Float baths in glass making |
   Fulltext... Hierarchy... Expanded...D01D 1/09 | Manufacture of artificial filaments, threads, fibres, bristles or ribbons |
   Fulltext... Hierarchy... Expanded...D04B 35/30 | Knitting machines |
   Fulltext... Hierarchy... Expanded...D06F 75/26 | Hand irons |
   Fulltext... Hierarchy... Expanded...D21F 5/06 | Paper-making machines |
   Fulltext... Hierarchy... Expanded...F01M 5/00 | Lubricant in lubrication arrangements |
   Fulltext... Hierarchy... Expanded...F16N 7/08 | Arrangements for supplying oil or unspecified lubricant from a reservoir |
   Fulltext... Hierarchy... Expanded...F22G 5/00 | Steam superheat |
   Fulltext... Hierarchy... Expanded...F26B 21/10 | Dryers |
   Fulltext... Hierarchy... Expanded...G01N 30/30 | Temperature of fluid carrier in chemical analysis |
   Fulltext... Hierarchy... Expanded...H01M 10/50 | Electric storage cells |
   Fulltext... Hierarchy... Expanded...H05B 6/06, Fulltext... Hierarchy... Expanded...H05B 6/50, Fulltext... Hierarchy... Expanded...H05B 6/68 | Dielectric, induction or microwave heating |
   Fulltext... Hierarchy... Expanded...H05G 1/36 | Anode of X-ray tube |
   Places related to Fulltext... Hierarchy... Expanded...G05D 25/00
   Fulltext... Hierarchy... Expanded...B41B 21/08 | Photographic composing machines |
   Fulltext... Hierarchy... Expanded...H01S 3/10, Fulltext... Hierarchy... Expanded...H05B 33/08, Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...H05B 35/00-H05B 43/00 | Lasers and other light sources |
   General references
   Fulltext... Hierarchy... Expanded...A01J 5/007 | Milking machines |
   Fulltext... Hierarchy... Expanded...B23K 9/095 | Welding parameters |
   Fulltext... Hierarchy... Expanded...B23Q 35/00 | Copying |
   Fulltext... Hierarchy... Expanded...B24B 17/00, Fulltext... Hierarchy... Expanded...B24B 49/00 | Grinding or polishing |
   Fulltext... Hierarchy... Expanded...B24C 7/00 | Abrasive blasts |
   Fulltext... Hierarchy... Expanded...B67D 1/12 | Dispensing beverages on draught |
   Fulltext... Hierarchy... Expanded...G03G 21/20 | Electrographic, electrophotographic or magnetographic processes |
   Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...H02P 5/00-H02P 9/00 | Dynamo-electric motors or generators |

|  | G05D |
Subclass index
CONTROL OF: SPEED OR ACCELERATION; FORCE; PRESSURE; POWER; MECHANICAL OSCILLATIONS | 13/00; 15/00; 16/00; 17/00; 19/00
CONTROL OF: FLOW; LEVEL; RATIO | 7/00; 9/00; 11/00
CONTROL OF: TEMPERATURE; HUMIDITY; VISCOSITY; CHEMICAL OR PHYSICO-CHEMICAL VARIABLES; LIGHT INTENSITY | 23/00; 22/00; 24/00; 21/00; 25/00
CONTROL OF: POSITION, DIRECTION, DIMENSIONS | 1/00 - 5/00
SIMULTANEOUS CONTROL OF TWO OR MORE VARIABLES | 27/00, 29/00

|  | G05F |
SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES (regulating the timing or recurrence frequency of pulses in radar or radio navigation systems Fulltext... Hierarchy... Expanded...G01S; closed-loop systems for regulating non-electric variables by electric means Fulltext... Hierarchy... Expanded...G05D; regulating power supply of digital computers Fulltext... Hierarchy... Expanded...G06F 1/26; regulating electric power distribution networks Fulltext... Hierarchy... Expanded...H02J; regulating the charging of batteries Fulltext... Hierarchy... Expanded...H02J 7/00; regulating of the output of static converters, e.g. switching regulators, Fulltext... Hierarchy... Expanded...H02M; regulation of the output of electric generators Fulltext... Hierarchy... Expanded...H02N, Fulltext... Hierarchy... Expanded...H02P 9/00, Fulltext... Hierarchy... Expanded...H03L; controlling transformers, reactors or choke coils Fulltext... Hierarchy... Expanded...H02P 13/00; regulating frequency response, gain, maximum output, amplitude or bandwidth of amplifiers Fulltext... Hierarchy... Expanded...H03G; regulating tuning of resonant circuits Fulltext... Hierarchy... Expanded...H03J; regulating characteristics of transmission lines Fulltext... Hierarchy... Expanded...H04B; electric control of X-ray apparatus Fulltext... Hierarchy... Expanded...H05G 1/30) [4,5]

|  | G05F |
Note(s) 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 essential characteristic resides in the combination. [4] 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 Fulltext... Hierarchy... Expanded...F16C 1/10; gearings or mechanisms not peculiar to this purpose Fulltext... Hierarchy... Expanded...F16H; speed changing or reversing mechanisms for gearings conveying rotary motion Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F16H 59/00-F16H 63/00)

|  | G05G |
2. Note(s) This subclass covers: members of general applicability for mechanical control; mechanical systems for moving members to one or more definite settings. Systems peculiar to the control of particular machines or apparatus provided for in a single other class are classified in the relevant class for such machines or apparatus, for example: [6]
   Fulltext... Hierarchy... Expanded...A61G 13/02 | Controls for adjusting operating tables [6] |
   Fulltext... Hierarchy... Expanded...A61G 15/02 | Controls for adjusting operating chairs [6] |
   Fulltext... Hierarchy... Expanded...B25J | Manipulators, e.g. controls therefor [6] |
   Fulltext... Hierarchy... Expanded...B60K 26/00 | Arrangement or mounting of propulsion-unit control devices in vehicles [6] |
   Fulltext... Hierarchy... Expanded...B60T 7/00 | Vehicle brake-action initiating means [6] |
   Fulltext... Hierarchy... Expanded...B62D 33/073 | Adaptations of control devices for movable vehicle cabs [6] |
   Fulltext... Hierarchy... Expanded...B62K 21/00 | Cycle-steering devices [6] |
   Fulltext... Hierarchy... Expanded...B62K 23/00 | Rider-operated controls specially adapted for cycles [6] |
   Fulltext... Hierarchy... Expanded...B62L 3/00 | Brake-actuating mechanisms specially adapted for cycles [6] |
   Fulltext... Hierarchy... Expanded...B63H 25/02 | Marine steering initiating means [6] |
   Fulltext... Hierarchy... Expanded...B66B 1/00 | Controls for elevators [6] |
   Fulltext... Hierarchy... Expanded...B66C 13/18 | Control systems or devices for cranes [6] |
   Fulltext... Hierarchy... Expanded...B66C 13/56 | Arrangements of handles or pedals for crane operation [6] |
   Fulltext... Hierarchy... Expanded...E02F 9/20 | Control devices for dredging or soil shifting machines [6] |
   Fulltext... Hierarchy... Expanded...F16C 3/28 | Adjustable cranks or eccentrics [6] |
   Fulltext... Hierarchy... Expanded...F16D 43/00 | Automatic clutches [6] |
   Fulltext... Hierarchy... Expanded...F16K 31/00, Fulltext... Hierarchy... Expanded...F16K 33/00 | Controls for valves [6] |
   Fulltext... Hierarchy... Expanded...F16P 3/00 | Safety devices acting in conjunction with the control or operation of a machine [6] |
   Fulltext... Hierarchy... Expanded...F16P 7/02 | Stopping machines on occurence of dangerous conditions therein [6] |
   Fulltext... Hierarchy... Expanded...G02B 21/32 | Micromanipulators structurally combined with microscopes [6] |
   Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...G04B 1/00-G04B 18/00 | Driving mechanisms in clocks or watches [6] |
   Fulltext... Hierarchy... Expanded...G06C | Digital computers in which all the computation is effected mechanically [6] |
   Fulltext... Hierarchy... Expanded...G06F 3/02 | Manual computer input arrangements [6] |
   Fulltext... Hierarchy... Expanded...G06K 11/00 | Converting a pattern of mechanical parameters into electric signals [6] |
   Fulltext... Hierarchy... Expanded...G21C 7/08 | Displacement of solid control elements in nuclear reactors [6] |
   Fulltext... Hierarchy... Expanded...H01H | Mechanisms for operating switch contacts [6] |
   Fulltext... Hierarchy... Expanded...H03J 1/00 | Mechanical control of resonant circuits. [6] |

|  | G05G |
Subclass index
MANUALLY-ACTUATED CONTROL MECHANISMS, ONE OR MORE CONTROLLING MEMBERS ACTUATING ONE OR MORE CONTROLLED MEMBERS | 7/00, 9/00, 11/00, 13/00
AUTOMATIC MOVEMENT-INITIATING DEVICES; TRIP MECHANISMS | 15/00; 17/00
SERVO-MECHANISMS | 19/00
PROGRAMME-CONTROL DEVICES | 21/00
LOCKING MEANS, LIMITING MEANS; POSITIONING MEANS | 5/00; 23/00
COMPONENT PARTS | 1/00, 3/00, 25/00