|  | G |
SECTION G — PHYSICS

INSTRUMENTS

|  | G06 |
COMPUTING; CALCULATING; COUNTING (score computers for games Fulltext... Hierarchy... Expanded...A63B 71/06, Fulltext... Hierarchy... Expanded...A63D 15/20, Fulltext... Hierarchy... Expanded...A63F 1/18; combinations of writing appliances with computing devices Fulltext... Hierarchy... Expanded...B43K 29/08)

|  | G06 |
Note(s) Attention is drawn to the notes (particularly the definition of the term "variable") on page 7 of this Section. In this class: The term "data" is understood to be synonymous with "information", and the term "information" is therefore not used in sub-class Fulltext... Hierarchy... Expanded...G06C or Fulltext... Hierarchy... Expanded...G06F. The terms "calculating" and "computing" are both understood to include, inter alia, operations on numerical values and on data expressed in numerical form; of these words "computing" is used throughout the class. "Computation" is derived from this interpretation of "computing". In the French language the word "calcul" will serve for either word. In those sub-classes which include simulators: a simulator in class Fulltext... Hierarchy... Expanded...G06 is concerned with the mathematics of computing the existing or anticipated conditions within the real device or system; control functions derived from simulators are not in class Fulltext... Hierarchy... Expanded...G06 but are generally in class Fulltext... Hierarchy... Expanded...G05, although they may be in the sub-class for the device controlled; measurement of an individual variable to serve as an input to a simulator is in class Fulltext... Hierarchy... Expanded...G01; a simulator is regarded as a teaching or training device proper to class Fulltext... Hierarchy... Expanded...G09 if the simulator gives perceptible sensations having a likeness to the sensations the student would experience in reality in response to actions taken by him. Simulators which demonstrate, by means involving computing, the functioning of apparatus or of a system are in class Fulltext... Hierarchy... Expanded...G06, if no provision exists elsewhere. Components of simulators, if identical with real devices or machines, are classified in the relevant sub-class for these devices or machines and not in class Fulltext... Hierarchy... Expanded...G06 or Fulltext... Hierarchy... Expanded...G09; a simulator may use the same time scale as the real device or operate on an expanded or compressed time scale; models of real devices to reduced or expanded scales are not regarded as simulators. The term "record carrier" is understood to mean a body, such as a cylinder, disc, card, tape, or wire, capable of permanently holding information, which can be read-off by a sensing element movable relative to the recorded information.

|  | G06G |
ANALOGUE COMPUTERS

|  | G06G 1/00 |
Hand-manipulated computing devices (planimeters Fulltext... Hierarchy... Expanded...G01B 5/26)

|  | G06G 1/02 |
· | Devices in which computing is effected by adding, subtracting, or comparing lengths of parallel or concentric graduated scales

|  | G06G 1/04 |
· · | characterised by construction (Fulltext... Hierarchy... Expanded...G06G 1/10 takes precedence)

|  | G06G 1/06 |
· · · | with rectilinear scales, e.g. slide rule

|  | G06G 1/08 |
· · · | with circular or helical scales

|  | G06G 1/10 |
· · | characterised by the graduation

|  | G06G 1/12 |
· · · | logarithmic graduations, e.g. for multiplication

|  | G06G 1/14 |
· | in which a straight or curved line has to be drawn from given points on one or more input scales to one or more points on a result scale

|  | G06G 1/16 |
· | in which a straight or curved line has to be drawn through related points on one or more families of curves

|  | G06G 3/00 |
Devices in which the computing operation is performed mechanically (Fulltext... Hierarchy... Expanded...G06G 1/00 takes precedence)

|  | G06G 3/02 |
· | for performing additions or subtractions, e.g. differential gearing

|  | G06G 3/04 |
· | for performing multiplications or divisions, e.g. variable-ratio gearing

|  | G06G 3/06 |
· | for evaluating functions by using cams and cam followers

|  | G06G 3/08 |
· | for integrating or differentiating, e.g. by wheel and disc

|  | G06G 3/10 |
· | for simulating specific processes, systems, or devices

|  | G06G 5/00 |
Devices in which the computing operation is performed by means of fluid-pressure elements (such elements in general Fulltext... Hierarchy... Expanded...F15C)

|  | G06G 7/00 |
Devices in which the computing operation is performed by varying electric or magnetic quantities

|  | G06G 7/02 |
· | Details not covered by groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...G06G 7/04-G06G 7/10

|  | G06G 7/04 |
· | input or output devices (graph readers Fulltext... Hierarchy... Expanded...G06K 11/00; function plotters, co-ordinate plotters Fulltext... Hierarchy... Expanded...G06K 15/22)

|  | G06G 7/06 |
· | Programming arrangements, e.g. plugboard for interconnecting functional units of the computer; Digital programming

|  | G06G 7/10 |
· | Power supply arrangements

|  | G06G 7/12 |
· | Arrangements for performing computing operations, e.g. amplifiers specially adapted therefor (amplifiers in general Fulltext... Hierarchy... Expanded...H03F)

|  | G06G 7/122 |
· · | for optimisation, e.g. least square fitting, linear programming, critical path analysis, gradient method [2]

|  | G06G 7/14 |
· · | for addition or subtraction (of vector quantities Fulltext... Hierarchy... Expanded...G06G 7/22)

|  | G06G 7/16 |
· · | for multiplication or division

|  | G06G 7/161 |
· · · | with pulse modulation, e.g. modulation of amplitude, width, frequency, phase, or form [2]

|  | G06G 7/162 |
· · · | using galvano-magnetic effects, e.g. Hall effect; using similar magnetic effects [2]

|  | G06G 7/163 |
· · · | using a variable impedance controlled by one of the input signals, variable amplification or transfer function [2]

|  | G06G 7/164 |
· · · | using means for evaluating powers, e.g. quarter square multiplier (evaluating powers Fulltext... Hierarchy... Expanded...G06G 7/20) [2]

|  | G06G 7/18 |
· · | for integration or differentiation (Fulltext... Hierarchy... Expanded...G06G 7/19 takes precedence)

|  | G06G 7/182 |
· · · | using magnetic elements [3]

|  | G06G 7/184 |
· · · | using capacitive elements [3]

|  | G06G 7/186 |
· · · · | using an operational amplifier comprising a capacitor or a resistor in the feedback loop [3]

|  | G06G 7/188 |
· · · | using electromechanical elements [3]

|  | G06G 7/19 |
· · | for forming integrals of products, e.g. Fourier integrals, Laplace integrals, correlation integrals; for analysis or synthesis of functions using orthogonal functions (Fourier or spectrum analysis Fulltext... Hierarchy... Expanded...G01R 23/16; sound analysis or synthesis Fulltext... Hierarchy... Expanded...G10L)

|  | G06G 7/195 |
· · · | using electro-acoustic elements [3]

|  | G06G 7/20 |
· · | for evaluating powers, roots, polynomes, mean square values, standard deviation (Fulltext... Hierarchy... Expanded...G06G 7/122, Fulltext... Hierarchy... Expanded...G06G 7/28 take precedence; gamma correction in television systems Fulltext... Hierarchy... Expanded...H04N 5/20, Fulltext... Hierarchy... Expanded...H04N 9/53)

|  | G06G 7/22 |
· · | for evaluating trigonometric functions; for conversion of co-ordinates; for computations involving vector quantities (trigonometric computations using simultaneous equations Fulltext... Hierarchy... Expanded...G06G 7/34)

|  | G06G 7/24 |
· · | for evaluating logarithmic or exponential functions, e.g. hyperbolic functions

|  | G06G 7/25 |
· · | for discontinuous functions, e.g. backlash, dead zone, limiting, absolute value, or peak value [2]

|  | G06G 7/26 |
· · | Arbitrary function generators (using orthogonal functions, e.g. Fourier series, Fulltext... Hierarchy... Expanded...G06G 7/19; using curve follower Fulltext... Hierarchy... Expanded...G06K 11/02)

|  | G06G 7/28 |
· · · | for synthesising functions by piecewise approximation

|  | G06G 7/30 |
· · | for interpolation or extrapolation (Fulltext... Hierarchy... Expanded...G06G 7/122 takes precedence) [2]

|  | G06G 7/32 |
· · | for solving of equations

|  | G06G 7/34 |
· · · | of simultaneous equations (Fulltext... Hierarchy... Expanded...G06G 7/122 takes precedence) [2]

|  | G06G 7/36 |
· · · | of single equations of quadratic or higher degree (Fulltext... Hierarchy... Expanded...G06G 7/22, Fulltext... Hierarchy... Expanded...G06G 7/24 take precedence)

|  | G06G 7/38 |
· · · | of differential or integral equations

|  | G06G 7/40 |
· · · · | of partial differential equations (simulating specific devices Fulltext... Hierarchy... Expanded...G06G 7/48)

|  | G06G 7/42 |
· · · · · | using electrolytic tank

|  | G06G 7/44 |
· · · · · | using continuous medium, current-sensitive paper

|  | G06G 7/46 |
· · · · · | using discontinuous medium, e.g. resistance network

|  | G06G 7/48 |
· | Analogue computers for specific processes, systems, or devices, e.g. simulators [2]

|  | G06G 7/50 |
· · | for distribution networks, e.g. for fluids (Fulltext... Hierarchy... Expanded...G06G 7/62 takes precedence)

|  | G06G 7/52 |
· · | for economic systems; for statistics (Fulltext... Hierarchy... Expanded...G06G 7/122, Fulltext... Hierarchy... Expanded...G06G 7/19, Fulltext... Hierarchy... Expanded...G06G 7/20 take precedence)

|  | G06G 7/54 |
· · | for nuclear physics, e.g. nuclear reactors, radioactive fallout

|  | G06G 7/56 |
· · | for heat flow (Fulltext... Hierarchy... Expanded...G06G 7/58 takes precedence)

|  | G06G 7/57 |
· · | for fluid flow (Fulltext... Hierarchy... Expanded...G06G 7/50 takes precedence)

|  | G06G 7/58 |
· · | for chemical processes (Fulltext... Hierarchy... Expanded...G06G 7/75 takes precedence)

|  | G06G 7/60 |
· · | for living beings, e.g. their nervous systems

|  | G06G 7/62 |
· · | for electric systems or apparatus

|  | G06G 7/625 |
· · · | for impedance networks, e.g. determining response, determining poles or zeros, determining the Nyquist diagram (measuring impedance Fulltext... Hierarchy... Expanded...G01R 27/00) [2]

|  | G06G 7/63 |
· · · | for power apparatus, e.g. motors, or supply distribution networks [2]

|  | G06G 7/635 |
· · · · | for determining the most economical distribution in power systems [2]

|  | G06G 7/64 |
· · | for non-electric machines, e.g. turbine

|  | G06G 7/66 |
· · | for control systems

|  | G06G 7/68 |
· · | for civil-engineering structures, e.g. beam, strut, girder

|  | G06G 7/70 |
· · | for vehicles, e.g. to determine permissible loading of ships

|  | G06G 7/72 |
· · · | Flight simulator (Link trainers Fulltext... Hierarchy... Expanded...G09B 9/08)

|  | G06G 7/75 |
· · | for component analysis, e.g. of mixtures, of colours (Fulltext... Hierarchy... Expanded...G06G 7/122 takes precedence) [2]

|  | G06G 7/76 |
· · | for traffic

|  | G06G 7/78 |
· · | for direction-finding, locating, distance or velocity measuring, or navigation systems

|  | G06G 7/80 |
· · | for gunlaying; for bomb aiming; for guiding missiles [2]

|  | G06G 9/00 |
Devices in which mathematical operations are carried out with the aid of optical or electro-optical elements (optical elements per se Fulltext... Hierarchy... Expanded...G02B; electro-optical elements per se Fulltext... Hierarchy... Expanded...H01L)