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
 G10
MUSICAL INSTRUMENTS; ACOUSTICS
 G10

Note(s)

  1. This class covers all sound-emitting devices, in general, whether or not they may be considered as being musical.
  2. In this class, the following expression is used with the meaning indicated:
    • "musical instrument" does not exclude devices emitting a single sound signal.
  3. The following Class Index is given in place of subclass indexes, to show the grouping of the elaborations belonging to different subclasses, under the following three fundamental types:
    • wind instruments;
    • string instruments;
    • percussion instruments,
    which relate clearly to the majority of instruments.
  4. There are of course some instruments of which the principle of operation belongs less clearly to one of the three types mentioned in Note (3). They correspond to groups G10D 17/00 or G10K 7/00, G10K 9/00 or G10K 15/04, all the other groups normally finding a definite place.
 G10
Class index
ACOUSTICS; OPERATIONS ON SOUND WAVES
Speech analysis or synthesis; speech recognition G10L
Methods or devices for transmission of sound or protection against sound, not otherwise provided for G10K 11/00, G10K 13/00
Acoustics not otherwise provided for G10K 15/00
WIND INSTRUMENTS
General features; details, accessories G10D 7/00; G10D 9/00
Organs, harmoniums, or similar instruments G10B 1/00, G10B 3/00
Accordions, concertinas, or similar instruments; other types of instruments G10D 11/00; G10D 7/00
Whistles; sirens; horns G10K 5/00; G10K 7/00; G10K 9/00
STRING INSTRUMENTS
General features; details, accessories G10D 1/00; G10D 3/00
Pianos, similar instruments; tools and methods for making or maintenance G10C 1/00, G10C 3/00; G10C 9/00
Other types of instruments G10D 1/00
PERCUSSION INSTRUMENTS
Bells, rattles, or similar instruments G10K 1/00, G10K 3/00
Other instruments G10D 13/00
OTHER PARTICULAR DEVICES: DEVICES USING UNDEFINED PRINCIPLES; COMBINATIONS OF INSTRUMENTS; MUSIC ACCESSORIES
Electrophonic musical instruments G10H
Automatic musical instruments G10F
Sirens; devices with vibrators G10K 7/00; G10K 9/00
Combinations: of pianos with other instruments; of other instruments G10C 5/00; G10D 15/00
Music accessories G10G
INSTRUMENTS NOT OTHERWISE PROVIDED FOR G10D 17/00

 G10C
PIANOS (non-musical aspects of toy pianos A63H 5/00; aspects of automatic actuation G10F; combinations of microphones, pick-ups or amplifiers with musical instruments G10H)
P:10 G10C 1/00
General design of pianos or like stringed musical instruments with keyboard
 G10C 1/02
·  of upright pianofortes
 G10C 1/04
·  of grand pianofortes
 G10C 1/06
·  of cembaloes, spinets, or similar stringed instruments
P:20 G10C 3/00
Details of, or accessories for, pianos or the like
 G10C 3/02
·  Cases
 G10C 3/04
·  Frames; Bridges; Bars
 G10C 3/06
·  Resonating means, e.g. resonant strings, soundboards; Fastenings of the resonating means
 G10C 3/08
·  Arrangements of strings
 G10C 3/10
·  Tuning pins or straining devices
 G10C 3/12
·  Keyboards; Keys
 G10C 3/14
·  ·  for actuation by the feet
 G10C 3/16
·  Actions
 G10C 3/18
·  ·  Hammers
 G10C 3/20
·  ·  involving the use of hydraulic, pneumatic, or electromagnetic means
 G10C 3/22
·  ·  for grand pianofortes
 G10C 3/24
·  ·  for reciprocating of tremolo
 G10C 3/26
·  Pedals or pedal mechanisms for half-blow or similar sound-modifying
 G10C 3/28
·  Transposing devices
 G10C 3/30
·  Couplers, e.g. for playing octaves
P:0 G10C 5/00
Combinations of pianos with other musical instruments, e.g. with bells, with xylophone
P:30 G10C 9/00
Special tools or methods for the manufacture or maintenance of pianos