|  | 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.

|  | G10B |
ORGANS; HARMONIUMS (mouth organs or accordions Fulltext... Hierarchy... Expanded...G10D; aspects of automatic actuation Fulltext... Hierarchy... Expanded...G10F; electronic organs Fulltext... Hierarchy... Expanded...G10H)

|  | G10B 1/00 |
General design of organs, harmoniums, or like wind-actuated musical instruments

|  | G10B 1/02 |
· | of organs

|  | G10B 1/04 |
· · | electrically operated

|  | G10B 1/06 |
· · | fluid operated

|  | G10B 1/08 |
· | of harmoniums

|  | G10B 3/00 |
Details of, or accessories for, organs, harmoniums, or the like

|  | G10B 3/02 |
· | Blowers (compressors, blowers, per se Fulltext... Hierarchy... Expanded...F04)

|  | G10B 3/04 |
· | Reservoirs

|  | G10B 3/06 |
· | Valves; Sleeves

|  | G10B 3/08 |
· | Pipes, e.g. open pipe, reed pipe

|  | G10B 3/10 |
· | Actions, e.g. coupler

|  | G10B 3/12 |
· | Keys or keyboards; Manuals (keyboards for musical instruments in general Fulltext... Hierarchy... Expanded...G10C 3/12)

|  | G10B 3/14 |
· | Pedals or pedal boards

|  | G10B 3/16 |
· | Swell chambers; Accentuating means

|  | G10B 3/18 |
· | Tremolo-producing devices

|  | G10B 3/20 |
· | Transposing devices

|  | G10B 3/22 |
· | Details peculiar to electrically-operated organs, e.g. contacts therefor