FR2724253A1 - Left=hand two=section keyboard arrangement for accordion - Google Patents

Abstract

The left-hand keyboard is arranged as two sub-keyboard groups, the first of which has three rows of vertical keys parallel with the key rows of the right-hand keyboard. The keys of the row of the first sub-group closest to the second sub-group give notes which are between one and five octaves lower, plus one semitone, than the corresponding keys of the second sub-group. The second sub-group has four rows of keys, with the keys of each row producing a note separated from the next key by an interval of a minor third, the notes becoming sharper in the vertically upward direction of the group. In a transverse and diagonally upward direction of the second sub-group the notes increase by a semitone. The fourth row of the second sub-group repeats the first row.

Description

DESCRIPTION
The present invention relates to instruments and more particularly to accordions or instruments of a similar type.

 The current accordion includes two keyboards, one used for the melody, on the right, the other by the left hand for accompaniment. The first is composed of chromatic button or piano keys spaced by a semitone; the second only of button-buttons called bass and chords. Each button controls a valve opening or closing an orifice in which is placed a metal reed vibrating with the passage of the air produced by a bellows itself actuated by the left arm.

 The basic right keyboard of the accordion consists of three rows of button keys, the notes of each row being arranged vertically at a musical interval of a minor third between two consecutive keys. In the drawing annexed to Fig. 1 given only by way of example is shown a keyboard known as "Italian" the best known, of two octaves corresponding to the following notes to be read in the arrow direction.

al: octave 3 bl: sharp p cl: re
a2: d sharp b2: mi c2: fa
a3: sharp p b3: ground c3: sharp p
a4: la3 b4: the sharp c4: if
a5: octave 4 do etc ...

(do3 corresponds to the note of the first additional line located below the treble clef; la3 at the end of the tuning fork.)
In Fig 2 is shown a fourth additional row reproducing the first commonly used to facilitate execution. These four rows have in fact become the current basic keyboard of the button accordion. The following notes specify the articulation of the two keyboards:
al: do bl: do sharp cl: re dl: re sharp
a2: d sharp b2: mi c2: fa d2: fa sharp in other systems (Belgian, Russian etc ...) the notes of each of the three basic rows can be inverted: a can be in b or c; b in a or c; finally c in a or b.

l. On a traditional accordion, the left keyboard is made up of two groups of vertical rows of keys:
a / keys producing single or low notes with a range of one octave or 12 notes of a semitone. These keys in variable quantities forming a multiple of twelve are arranged in two or three parallel vertical rows each of 'being separated from the previous one by a musical interval of a fair fifth (Ex: do-sol).

b / keys producing notes composed of so-called chord notes normally arranged in three rows parallel to those of the group in a /, the row adjoining this second group to the first group produces major chords (Ex; domi-sol). The row contiguous to that above for minor chords (Ex: do-mi flat-sol); the row contiguous to that above of minor double-thirds chords (Ex: do-mi bémolfa sharp) .This keyboard therefore only allows to have an octave (in general from Mi 0 to D sharp 1) insufficient extent and only have pre-set compound chords that are most often contrary to the laws of harmony since no reversal is possible. , 2.I1 also exists another left keyboard of different design equipping the so-called "concert" accordions. Having the following particularities:
-a keyboard of chromatic keys with four rows identical to the right keyboard with four rows, whose notes can be either at the top or at the bottom of the keyboard
-a second sub-keyboard of two rows of keys called "bass pedals" with a range of one octave, the notes being ordered in just fifths in the vertical direction.

This keyboard although improved compared to 1. ~ described does not allow accompaniment in a current way and has the disadvantage of being in the form of two sub-keyboards not responding to the same plan of notes that is that is, a nte unique execution logic.

3 A left keyboard solving the problems of the instruments described in 1 and 2 above was the subject of a patent of invention N "2 594 584 N" of National Registration 86 0285 filed on February 17, 1986 in INPI. In figure N "3 given as a simple example on two octaves correspond the following notes:
Group A dl: D sharp octave 0 el: mi fl: fa d2: F sharp e2: G f2: G sharp d3: E3: G sharp f3: Dg d: Do e4: C sharp f4: Dg d5: D sharp of octave 1 etc ...

Group B al: octave 1 bl: do sharp cl: re a2: re sharp b2: mi c2: fa a3: fa sharp b3: sol c3 sol sharp a4: b4: sharp c4: if a5: do octave 2 etc ...

However, the keyboard filed above included a sub-keyboard with three rows (Group B) while concert accordions include four rows. The object of the present invention is therefore to adapt the patent filed above by supplementing it by a fourth row corresponding to the same plan of notes as the keyboard of concert accordions.

 Consequently, the left keyboard, object of the present invention corresponds to the following characteristics: 1 Keyboard comprising the low notes at the bottom: -A first sub-keyboard of three rows of parallel vertical keys and of the same plane of notes as the basic keyboard of the accordion characterized in that each note of the row contiguous to the second sub-keyboard is at the musical pitch of -k- lower octaves increased by a semitone (k can be a number ranging from 1 to 5) with respect to the contiguous note of the second sub-keyboard situated on a transverse line of keys directed downwards and passing through the note considered of the first sub-keyboard.

-A second sub-keyboard with four rows of parallel vertical keys and the same spacing as the three rows of the first sub-keyboard, each of the keys being separated from the next as for the notes of the first sub-keyboard by a musical interval of a minor third higher from bottom to top of the instrument and a semitone higher on any of the transverse lines inclined upwards starting from the bottom and in this direction.

2 Keyboard with low notes at the top.

In this case the characteristics are mutatis mutandis the same and the following:
A first sub-keyboard of three rows of parallel vertical keys and of the same note plane as the basic keyboard of the accordion and, moreover, characterized in that each note of the row contiguous to the second keyboard is at the musical pitch of - k- lower octaves increased by a semitone (k can be a number from there5) compared to the contiguous note of the second sub-keyboard located on a transverse line of keys directed upwards and passing through the note considered of the first sub-keyboard.

-A second sub-keyboard with four rows of parallel vertical keys and the same spacing as the three rows of the first sub-keyboard, each of the keys being separated from the next, as for the notes of the first sub-keyboard by a musical interval d '' a minor third higher by going from top to bottom of the instrument and by a semitone higher on any of the transverse lines inclined downwards starting from the top and in this direction.

By way of example only is shown in FIG. 4, the left keyboard above described for a two octave model having the low notes at the bottom; the progression of the notes taking place from bottom to top of the keyboard, that is to say from left to right in the figure from the E flat of range 0 of Group ^ utau do of range 3 of Group B.

Group A el: d sharp 0 fl: mi0 gl: fa0 e2: fa sharp 0 f2: solO g2: soldièse0 e3: la0 f3: ladièse0 g ": si0 e4: dol f4: do sharp 1 g4: ré 1 e5: d sharp 1 f5: mil g5: fa 1 e8: do 2 f8: do sharp 2 g8: re 2
Group B al: dol bl: do sharp 1 cl: ré dl: ré sharp 1 a2: ré sharp 1 b2: mil c2: fal d2: fa sharp 1 a3: fa dièsel b3: soll C ": ground sharp 1 d3: la 1 a4: 1 b4: hash 1 c4: if 1 d4: do2 a5: do 2 b5: do sharp 2 c5: re2 d5: re sharp 2 a8: 2 b8: hash 2 c8: si2 d8: do3
Another example is provided by FIG. 5 and relates to a keyboard whose progression of the musical pitch of the notes is carried out on the drawing from right to left, that is to say, in real position of the high instrument below, the low notes at the top.

Group A e8: re sharp 0 f8: mi0 g8: fa0 e7: fa sharp 0 f7: ground 0 g7: sharp sharp 0 e6: 0 f6: sharp 0 g6: if 0 e5: do 1 f5: do sharp 1 g5 : re 1 e4: re sharp 1 g4: mi 1 g4: fa 1 el: do 2 gl: do sharp 2 gl: re 2
Group B a8: do 1 b8: do sharp 1 c8: re 1 d8: re sharp 1 a7: re sharp b7: mi 1 c7: fa 1 d7: fa sharp 1 a6: fa sharp 1 b6: ground 1 c6: ground sharp 1 d6: 1 a5: 1 b5: hash 1 c5: if 1 d5: do 2 a4: dB 2 b4: do hash 2 c4: re 2 d4: re hash 2 ~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ al: la 2 bl: pound 2 cl: si 2 dl: do 3 I1 was previously exposed that the basic keyboard is in practice, of four rows for reasons of ease and imperative of execution; the fourth row being the identical repetition of the first. The logic of doubling two sub-keyboards to create a left keyboard of twice four rows or eight rows.

In fig. 6 and 7, two resulting examples are reproduced.

Fig 6: Group B is identical to that of Figure 4 already examined. Group A is that of Fig. 4 supplemented by a fourth row called h whose musical notes are as follows: hl: f sharp 0 h2: a 0 h3: do 1 h4: re sharp 1 h5: fa sharp 1 h6: 1 h7: do 2 h8: d sharp 2
Fig. 7: Group B is identical to that of fig. 5 already reviewed. Group A is that of fig. 4 completed by a fourth row called h whose notes on the example are as follows:
c h8: F sharp 0 h7: 0h6: C 1 h5: D sharp 1 h4: F sharp 1 h3: 1 h2: C 2 hl: D sharp 2
It is specified that the first row of the sub-keyboard 'Group B
can be any of the three basic keyboard rows
of Fig. 1 provided that the provisions described above
are respected.

Claims (3)

CLAIMS.  1 / Accordion having a left keyboard composed of two sub-keyboards characterized in that the first has three rows of vertical and parallel keys of the same note plane as the basic right keyboard with buttons of this instrument, and in that each note of the row contiguous to the second second sub-keyboard or the musical pitch of -k- lower octaves increased by a semitone (k being equal to a digit going from 1 to 5) compared to the contiguous note of the second sub- keyboard located on the same transverse line of keys directed towards the bottom of the instrument; the second sub-keyboard being four rows of keys, each of which is separated from the next by an interval of a minor third more acute in the vertical direction from bottom to top and of a more acute semitone in the transverse direction inclined from bottom to top, the fourth row being the repetition of the first.  2 / Accordion according to claim 1, further characterized in that each note in the row contiguous to the second sub-keyboard is at the lower pitch of -k- octaves increased by a semitone (k being equal to a number going from 1 to 5) compared to the contiguous note of the second sub-keyboard located on the same transverse line of keys directed towards the top of the instrument; the second sub-keyboard being with four rows of keys, each of which responds to the same note plan as the basic right keyboard of the accordion, that is to say that each note is separated from the next by a interval of a minor third more acute in the vertical direction from top to bottom and of a more acute demiton in the transverse direction inclined from top to bottom, the fourth row being the repetition of the first.  3 / Accordion according to claims 1 and 2, characterized in that it comprises two sub-keyboards of four rows each, according to the above arrangements, the fourth rows being the repetitions of the first.