G
SECTION G — PHYSICS
 G

Note(s)

  1. 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).
  2. 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 G01 and "control" and "regulation" in class G05.
  3. 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 (G09), for enabling the result of a measurement to be known (G01), for signalling the information to a distant point or for giving information which has been signalled from a distant point (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 (G01L) or about some other condition linked to the pressure (another subclass of class G01, e.g., G01K for temperature), to make a record of the pressure or of its occurrence (G07C), to give an alarm (G08B), or to control another apparatus (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
 G04
HOROLOGY
 G04B
MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME-PIECES USING THE POSITION OF THE SUN, MOON, OR STARS (spring- or weight-driven mechanisms in general F03G; electromechanical clocks or watches G04C; electromechanical clocks with attached or built-in means operating any device at preselected times or after predetermined time intervals G04C 23/00; clocks or watches with stop devices G04F 7/00; structural details or housings specially adapted for electronic time-pieces with no moving parts G04G 17/00)
 G04B

Note(s)

This subclass covers mechanically-driven calendar clocks or clockwork calendars, and the mechanical part of such clocks or calendars.

 G04B
Subclass index
DRIVING MECHANISM 1/00
WINDING
Normal; automatic; combined 3/00; 5/00; 7/00
Supervision; winding parts 9/00; 11/00
CLOCK MOVEMENT
Escapement; frequency stabiliser; setting frequency gearwork; adjusting thereof 15/00; 17/00; 18/00; 13/00; 35/00
TIME INDICATING 19/00, 21/00, 23/00, 25/00
TIME SETTING 27/00
FRAMEWORKS; SUPPORTS; CALIBERS 29/00; 31/00; 33/00
PROTECTION OF CLOCKWORK
Cases; crystals, glasses; other protection means 37/00; 39/00; 41/00, 43/00
UNUSUAL CLOCKS 45/00, 47/00, 49/00
SUBJECT MATTER NOT PROVIDED FOR IN OTHER GROUPS OF THIS SUBCLASS 99/00
 G04B 1/00
Driving mechanisms
P:180 G04B 1/00
Driving mechanisms
 G04B 3/00 - 
G04B 11/00
Winding
P:60 G04B 3/00
Normal winding of clockworks by hand or mechanically; Winding-up several mainsprings or driving weights simultaneously
P:50 G04B 5/00
Automatic winding-up
P:40 G04B 7/00
Combined normal and automatic winding-up
P:30 G04B 9/00
Supervision of the state of winding, e.g. indicating the amount of winding
P:70 G04B 11/00
Click devices, stop clicks or clutches for winding
P:190 G04B 13/00
Gearwork
P:130 G04B 15/00
Escapements (electric or magnetic means for converting oscillatory to rotary motion in electromechanical time-pieces G04C 5/00)
P:150 G04B 17/00
Mechanisms for stabilising frequency  [3]
P:140 G04B 18/00
Mechanisms for setting frequency  [3]
 G04B 19/00 - 
G04B 27/00
Time indicating
P:120 G04B 19/00
Indicating the time by visual means (by electric lamps G04C 17/00; display arrangements in general G09)
 G04B 19/06
·  Dials (for time-pieces without clockwork G04B 49/00)
 G04B 19/30
·  Illumination of dials or hands
P:110 G04B 21/00
Indicating the time by acoustic means (at preselected times G04B 23/00; by electro-acoustic means G04C 21/00; sound-producing apparatus per se G10)
P:100 G04B 23/00
Arrangements producing acoustic signals at preselected times (electrically-released alarm signals G04C 21/00; metronomes G04F 5/00; sound-producing apparatus per se G10)
P:90 G04B 25/00
Indicating the time by other means or by combined means (electric or electromechanical indicating G04C)
P:80 G04B 27/00
Mechanical devices for setting the time-indicating means
 G04B 29/00 - 
G04B 35/00
Frameworks, supports, or arrangements of the clockwork parts in relation to each other, so-called "calibers"
P:230 G04B 29/00
Frameworks
P:200 G04B 31/00
Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor (bearings in general F16C)
P:170 G04B 33/00
Calibers
P:160 G04B 35/00
Adjusting the gear train, e.g. the backlash of the arbors, depth of meshing of the gears
 G04B 37/00 - 
G04B 43/00
Protection of the clockwork against damage from outside
P:240 G04B 37/00
Cases (watch guards or protectors A45C 11/00; watches combined with cosmetic powder containers A45D 33/00)
 G04B 37/14
·  Suspending devices, supports, or stands for time-pieces in so far as they form part of the case (wrist-watch straps, fastening means therefor A44C 5/00)
P:250 G04B 39/00
Watch crystals; Fastening or sealing crystals; Clock glasses
P:210 G04B 41/00
Locking or holding devices for pendulums, chimes, or the like, for use during transport
P:220 G04B 43/00
Protecting clockworks by shields or other means against external influences, e.g. magnetic fields
 G04B 45/00 - 
G04B 47/00
Clocks with unusual features
P:10 G04B 45/00
Time-pieces of which the indicating means or cases provoke special effects, e.g. aesthetic effect (ornamental shaping of dials G04B 19/06)
P:20 G04B 47/00
Time-pieces combined with other articles which do not interfere with the running or the time-keeping of the time-piece (G04B 37/00 takes precedence; writing or drawing implements with devices for indicating time B43K 29/00; combinations with vehicle mirror assemblies B60R 1/12; combined with cameras, projectors, or photographic printing apparatus G03B 29/00)
P:0 G04B 49/00
Time-pieces using the position of the sun, moon, or stars
P:260 G04B 99/00
Subject matter not provided for in other groups of this subclass  [8]