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; audio analysis or processing 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 or 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; horns G10K 5/00; G10K 9/00
STRINGED INSTRUMENTS
General features; details or accessories G10D 1/00; G10D 3/00
Pianos, harpsichords, spinets or similar stringed musical instruments with one or more keyboards; tools and methods for the manufacture or maintenance thereofG10C 1/00, G10C 3/00; G10C 9/00
Other instrumentsG10D 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

 G10K
SOUND-PRODUCING DEVICES (sound-producing toys A63H 5/00);  METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR  [6]
 G10K

Note(s)

  1. This subclass covers arrangements for generating mechanical vibrations in fluids.  [6]
  2. This subclass covers also the production of sounds which may not be audible to human beings but which are audible to animals.
  3. In this subclass, the following terms are used with the meanings indicated:  [6]
    • "acoustics" and "sound" cover the technical field dealing with mechanical vibrations at all infrasonic-, sonic- and ultrasonic frequencies. However, generation or transmission of mechanical waves, in general, is covered by subclass B06B, subject to the exception specified in Note (1) above.  [6]
P:30 G10K 1/00
Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs (combinations with clocks or watches G04B, G04C; multi-toned musical instruments G10D 13/00; automatic carillons G10F 1/00)
P:20 G10K 3/00
Rattles or like noise-producing devices
P:10 G10K 5/00
Whistles
P:0 G10K 7/00
Sirens
P:40 G10K 9/00
Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers (loudspeakers or like acoustic electromechanical transducers H04R)
P:50 G10K 11/00
Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
P:60 G10K 13/00
Cones, diaphragms, or the like, for emitting or receiving sound in general (for electromechanical transducers H04R 7/00)
P:70 G10K 15/00
Acoustics not otherwise provided for  [4]
 G10K 15/02
·  Synthesis of acoustic waves (synthesis of speech G10L 13/00)  [4]
 G10K 15/04
·  Sound-producing devices (G10K 15/02 takes precedence)  [4]
 G10K 15/08
·  Arrangements for producing a reverberation or echo sound  [5]