|  | G |
SECTION G — PHYSICS

INSTRUMENTS

|  | G10 |
MUSICAL INSTRUMENTS; ACOUSTICS

|  | G10 |
Note(s) This class covers generally all sound-emitting devices, whether or not they may be considered as being musical. The term "musical instrument", used in this class, should not be understood as excluding devices emitting a single sound signal. For the convenience of users, the following Class Index is given in place of Sub-class Indexes, to show the grouping of the elaborations belonging to different sub-classes, under the three fundamental types: Wind instruments String instruments Percussion instruments which relate clearly to the majority of instruments. There are of course some instruments of which the principle of operation belongs less clearly to one of these three types. They correspond to groups Fulltext... Hierarchy... Expanded...G10D 17/00 and Fulltext... Hierarchy... Expanded...G10K 7/00, Fulltext... Hierarchy... Expanded...G10K 9/00, Fulltext... Hierarchy... Expanded...G10K 10/00, all the other groups normally finding a definite place.

|  | G10H |
ELECTROPHONIC MUSICAL INSTRUMENTS (electronic circuits in general Fulltext... Hierarchy... Expanded...H03)

|  | G10H |
Note(s) This sub-class deals with musical instruments in which individual notes are constituted as electric oscillations under the control of a performer and the oscillations are converted to sound-vibrations by a loud-speaker or equivalent instrument.

|  | G10H 1/00 |
Details of electrophonic musical instruments (keyboards applicable also to other musical instruments Fulltext... Hierarchy... Expanded...G10B, Fulltext... Hierarchy... Expanded...G10C)

|  | G10H 1/02 |
· | Means for controlling the tone frequencies, e.g. attack, decay; Means for producing special musical effects, e.g. vibrato, glissando

|  | G10H 1/04 |
· · | by additional modulation

|  | G10H 1/043 |
· · · | Continuous modulation [3]

|  | G10H 1/045 |
· · · · | by electromechanical means [3]

|  | G10H 1/047 |
· · · · | by acousto-mechanical means, e.g. rotating speakers or sound deflectors [3]

|  | G10H 1/053 |
· · · | during execution only [3]

|  | G10H 1/055 |
· · · · | by switches with variable impedance elements [3]

|  | G10H 1/057 |
· · · · | by envelope-forming circuits [3]

|  | G10H 1/06 |
· · | Circuits for establishing the harmonic content of tones

|  | G10H 1/08 |
· · · | by combining tones (Fulltext... Hierarchy... Expanded...G10H 1/14, Fulltext... Hierarchy... Expanded...G10H 1/16 take precedence; chord Fulltext... Hierarchy... Expanded...G10H 1/38; analysis or synthesis of sound waves per se Fulltext... Hierarchy... Expanded...G10L) [3]

|  | G10H 1/10 |
· · · · | for obtaining chorus, celeste or ensemble effects (continuous modulation Fulltext... Hierarchy... Expanded...G10H 1/043) [3]

|  | G10H 1/12 |
· · · | by filtering complex wave forme (Fulltext... Hierarchy... Expanded...G10H 1/14, Fulltext... Hierarchy... Expanded...G10H 1/16 take precedence) [3]

|  | G10H 1/14 |
· · · | during execution (modulation during execution Fulltext... Hierarchy... Expanded...G10H 1/053) [3]

|  | G10H 1/16 |
· · · | by non-linear elements (Fulltext... Hierarchy... Expanded...G10H 1/14 takes precedence; generation of non-sinusoidal basic tones Fulltext... Hierarchy... Expanded...G10H 5/10) [3]

|  | G10H 1/18 |
· | Selecting circuits [3]

|  | G10H 1/20 |
· · | for transposition [3]

|  | G10H 1/22 |
· · | for suppressing tones; Preference networks [3]

|  | G10H 1/24 |
· · | for selecting plural preset register stops [3]

|  | G10H 1/26 |
· · | for automatically producing a series of tones [3]

|  | G10H 1/28 |
· · · | to produce arpeggios [3]

|  | G10H 1/30 |
· · · | to reiteratively sound two tones [3]

|  | G10H 1/32 |
· | Constructional details [3]

|  | G10H 1/34 |
· · | Switch arrangements, e.g. keyboards or mechanical switches peculiar to electrophonic musical instruments (keyboards applicable also to other musical instruments Fulltext... Hierarchy... Expanded...G10B, Fulltext... Hierarchy... Expanded...G10C) [3]

|  | G10H 1/36 |
· | Accompaniment arrangements [3]

|  | G10H 1/38 |
· · | Chord [3]

|  | G10H 1/40 |
· · | Rhythm (metronomes Fulltext... Hierarchy... Expanded...G04F 5/02) [3]

|  | G10H 1/42 |
· · · | comprising tone forming circuits [3]

|  | G10H 1/44 |
· | Tuning means [3]

|  | G10H 1/46 |
· | Volume control [3]

|  | G10H 3/00 |
Instruments in which the tones are generated by electromechanical means

|  | G10H 3/02 |
· | using mechanical interrupters

|  | G10H 3/03 |
· | using pick-up means for reading recorded waves, e.g. on rotating discs [3]

|  | G10H 3/04 |
( transferred to Fulltext... Hierarchy... Expanded...G10H 3/03 )

|  | G10H 3/06 |
· · | using photoelectric pick-up means

|  | G10H 3/08 |
· · | using inductive pick-up means

|  | G10H 3/09 |
· · · | using tapes or wires [3]

|  | G10H 3/10 |
· · | using capacitive pick-up means

|  | G10H 3/12 |
· | using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument [3]

|  | G10H 3/14 |
· · | using mechanically actuated vibrators with pick-up means (Fulltext... Hierarchy... Expanded...G10H 3/24 takes precedence) [3]

|  | G10H 3/16 |
· · · | using a reed [3]

|  | G10H 3/18 |
· · · | using a string, e.g. electric guitar [3]

|  | G10H 3/20 |
· · · | using a tuning fork, rod or tube [3]

|  | G10H 3/22 |
· · | using electromechanically actuated vibrators with pick-up means (Fulltext... Hierarchy... Expanded...G10H 3/24 takes precedence) [3]

|  | G10H 3/24 |
· · | incorporating feed-back means, e.g. acoustic [3]

|  | G10H 3/26 |
· · · | using electric feed-back [3]

|  | G10H 5/00 |
Instruments in which the tones are generated by means of electronic generators (Fulltext... Hierarchy... Expanded...G10H 7/00 takes precedence)

|  | G10H 5/02 |
· | using generation of basic tones

|  | G10H 5/04 |
· · | with semiconductor devices as active elements (Fulltext... Hierarchy... Expanded...G10H 5/10, Fulltext... Hierarchy... Expanded...G10H 5/12 take precedence)

|  | G10H 5/06 |
· · | tones generated by frequency multiplication or division of a basic tone

|  | G10H 5/07 |
· · · | resulting in complex waveforms [3]

|  | G10H 5/08 |
· · | tones generated by heterodyning

|  | G10H 5/10 |
· | using generation of non-sinusoidal basic tones, e.g. sawtooth

|  | G10H 5/12 |
· · | using semiconductor devices as active elements

|  | G10H 5/14 |
· | using electromechanical resonator, e.g. quartz crystal, as frequency-determining element [3]

|  | G10H 5/16 |
· | using cathode ray tube [3]

|  | G10H 7/00 |
Instruments in which the tones are synthesised from a data store, e.g. computer organs (analysis or synthesis of sound waves per se Fulltext... Hierarchy... Expanded...G10L) [3]