|  | 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 (structural combinations of microphones, pick-ups, or amplifiers with musical instruments Fulltext... Hierarchy... Expanded...G10B, Fulltext... Hierarchy... Expanded...G10C, Fulltext... Hierarchy... Expanded...G10D; instruments in which each note is generated by a different individually-actuated mechanical resonating structure and is amplified electrically Fulltext... Hierarchy... Expanded...G10C; instruments in which each note is produced by a different electrically-vibrated sounding element Fulltext... Hierarchy... Expanded...G10D; 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 1/06 |
· · | Circuits for combining harmonic frequencies to generate predetermined tone colours

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

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

|  | G10H 3/04 |
· | using pick-up means for reading-off waves recorded on rotating discs

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

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

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

|  | G10H 5/00 |
Instruments in which the tones are generated by means of electronic generators

|  | 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 5/08 |
· · | 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