|  | G |
SECTION G — PHYSICS

INSTRUMENTS

|  | G09 |
EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS

|  | G09B |
EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR COMMUNICATING WITH THE BLIND OR DEAF; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS (devices for psychotechnics or for testing reaction times Fulltext... Hierarchy... Expanded...A61B 5/16; games, sports, amusements Fulltext... Hierarchy... Expanded...A63; projectors, projector screens Fulltext... Hierarchy... Expanded...G03B)

|  | G09B |
Note(s) A simulator is regarded as a teaching or training device proper to this sub-class 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 classified in class Fulltext... Hierarchy... Expanded...G06 if no provision exists elsewhere. Simulator components which are identical with real devices or machines or components thereof are classified in the relevant sub-classes for these devices or machines and not in sub-class Fulltext... Hierarchy... Expanded...G09B. Models of buildings, installations, or the like are covered by this sub-class.

|  | G09C |
CODING OR CIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHER PURPOSES INVOLVING THE NEED FOR SECRECY (secret transmission Fulltext... Hierarchy... Expanded...H04K; arrangements for transmitting secret digital information Fulltext... Hierarchy... Expanded...H04L 9/00)

|  | G09D |
RAILWAY OR LIKE TIME OR FARE TABLES; PERPETUAL CALENDARS (calendar blocks Fulltext... Hierarchy... Expanded...B42D 5/04; clockwork-driven Fulltext... Hierarchy... Expanded...G04B; comprising computing means Fulltext... Hierarchy... Expanded...G06C)

|  | G09F |
DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS (display cases Fulltext... Hierarchy... Expanded...A47F; designs or pictures characterised by special or unusual light effects, e.g. changing, Fulltext... Hierarchy... Expanded...B44F 1/00; disposition of road signs or traffic signals Fulltext... Hierarchy... Expanded...E01F 9/00; lighting in general Fulltext... Hierarchy... Expanded...F21; arrangements for controlling light beams Fulltext... Hierarchy... Expanded...G02F 1/00; visible signalling arrangements or devices Fulltext... Hierarchy... Expanded...G08B 5/00; traffic control systems Fulltext... Hierarchy... Expanded...G08G; arrangements or circuits for control of indicating devices using static means to present variable information Fulltext... Hierarchy... Expanded...G09G; static indicating arrangements comprising integral associations of a plurality of light sources Fulltext... Hierarchy... Expanded...H01J, Fulltext... Hierarchy... Expanded...H01K, Fulltext... Hierarchy... Expanded...H01L, Fulltext... Hierarchy... Expanded...H05B 33/12)

|  | G09F |
Note(s) The term "sign" is used in this sub-class to designate a mark or indication serving to make something recognisable, the information presented being non-varying, even if it is flashing; by way of example it covers, therefore, advertising hoardings, or luminous safety arrangements such as rear reflectors. [3]

|  | G09G |
ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (lighting in general Fulltext... Hierarchy... Expanded...F21; instruments for displaying electric variables or waveforms Fulltext... Hierarchy... Expanded...G01R 13/00; controlling light beams Fulltext... Hierarchy... Expanded...G02F 1/00; indicating of time by visual means Fulltext... Hierarchy... Expanded...G04B 19/00, Fulltext... Hierarchy... Expanded...G04C 17/00, Fulltext... Hierarchy... Expanded...G04G 9/00; arrangements for transferring data between computers and peripheral equipment Fulltext... Hierarchy... Expanded...G06F 3/00; visible signalling arrangements or devices Fulltext... Hierarchy... Expanded...G08B 5/00; traffic control systems Fulltext... Hierarchy... Expanded...G08G; display, advertising, signs Fulltext... Hierarchy... Expanded...G09F, e.g. static indicating arrangements comprising an association of a number of separate sources or light control cells Fulltext... Hierarchy... Expanded...G09F 9/00; static indicating arrangements comprising integral associations of a number of light sources Fulltext... Hierarchy... Expanded...H01J, Fulltext... Hierarchy... Expanded...H01K, Fulltext... Hierarchy... Expanded...H01L, Fulltext... Hierarchy... Expanded...H05B 33/12; circuits in pulse counters for indicating the result Fulltext... Hierarchy... Expanded...H03K 21/18) [3]

|  | G09G |
Note(s) This sub-class concerns indicator consoles, i.e. arrangements or circuits for processing control signals to achieve the display, e.g. for the calling up, reception, storage, regeneration, coding, decoding, addressing of control signals. This sub-class is not concerned with the structural details of the indicating devices, such as panels or tubes per se, or assemblies of individual light sources which are classified in the relevant sub-classes, e.g. Fulltext... Hierarchy... Expanded...H01J, Fulltext... Hierarchy... Expanded...H01K, Fulltext... Hierarchy... Expanded...H01L, Fulltext... Hierarchy... Expanded...G02F, Fulltext... Hierarchy... Expanded...G09F, Fulltext... Hierarchy... Expanded...H05B. [3] In contrast to sub-class Fulltext... Hierarchy... Expanded...H04N in which are classified display devices capable of representing continuous brightness value scales, the present sub-class is limited to devices using only a discrete number of brightness values, e.g. visible/non-visible. [3] The visual effect may be produced by a luminescent screen scanned by an electron beam, directly by controlled light sources, by projection of light, from controlled light sources onto characters, symbols, or elements thereof drawn on a support, or by electric, magnetic, or acoustic control of the parameters of light rays from an independent source. [3]