Music – Accessories – Teaching devices
Patent
1983-07-18
1986-07-29
Fuller, Benjamin R.
Music
Accessories
Teaching devices
84485SR, 84480, G09B 1502
Patent
active
046025502
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a ruler for composing or decomposing the chords for any polyphonic musical instrument.
In conventional chord rulers, the chord is treated as a whole: on a first level there are the fixed elements, in other words, the name of the chord accompanied by a window for the fundamental and followed by a number of windows equal to the number of notes which go to make up the chord and separated from one another by intervals which are characteristic of the chord; on a second movable level is the chromatic scale for the display of the notes in the windows.
That arrangement can be used for any first degree function and is widely used for conversion tables.
The major drawback of such rulers is that it is essential to have them show the complete catalogue of chords which makes them difficult and tiresome to use. All those rulers are therefore incomplete and selective in order to remain legible.
It is a particular object of the invention to remedy the deficiencies of prior chord rulers and to this end the invention resides in a ruler for composing or decomposing chords for a polyphonic musical instrument characterised in that it comprises: each provided with inscriptions relative to the notes of the chromatic scale, respectively assigned to the fundamental, the third, the fifth, the sixth, the seventh etc. of a chord, ruler slides, said cursor being provided with a window positioned to make evident one of the notes of the chromatic scale of each of the slides, and having a window positioned to make evident the inscriptions relative to the musical chord searched for, these inscriptions being carried on all the ruler slides except that which is rigid with the said element, the inscriptions on the ruler slides relative to the chromatic scale, and their inscriptions relative to the musical chords being positioned in relation to one another and in relation to the window in the cursor and the window in the indicator element in such a way that for a chord displayed in the window of the indicator element, the window in the cursor makes evident the notes of this chord for the fundamental chosen.
According to another characteristic of the invention, the windows in the indicator element and in the cursor each comprise two zones, the width of one of the zones being twice that of the other, the wider zone of the window in the cursor being displaced in relation to the three ruler slides allocated respectively to the fundamental, the third and the fifth of a chord, the wider zone of the window in the indicator element for displaying the chord moving in relation to the two ruler slides allocated to the third and the fifth, the less wide zones of the window in the indicator element and in the cursor moving in relation to all the remaining ruler slides as a whole which are allocated to the sixth, seventh, ninth etc.
According to a further feature of the invention, the window in the indicator element and in the cursor is made in the form of a slot at right angles to the direction of movement of the cursor and of the ruler slides.
According to a further feature of the invention, the element which is provided with the slot is made from transparent material and the subjacent ruler slides are provided, on each side of the position of the common major chord, with inscriptions relative to variations thereof, these inscriptions being visible through the transparent element.
According to a further feature of the invention, the ruler slides are provided with transverse divisions which define boxes, the boxes of the three ruler slides allocated respectively to the fundamental, the third and the fifth of a chord each comprising one note of the chromatic scale and being twice the width of the boxes of the remaining ruler slides which are allocated respectively to the sixth, seventh, ninth etc., the boxes for these remaining ruler slides having an empty box between each of the boxes in which there is a note.
According to another feature of the invention, the ruler slides are each integral with a sheet, the different sheets being
REFERENCES:
patent: 2832252 (1958-04-01), Gabriel
patent: 3481241 (1969-12-01), Gaillard
patent: 4175468 (1979-11-01), Whitlock
patent: 4289057 (1981-09-01), Whitlock
Dadi Marcel
Dadi Max M.
Fuller Benjamin R.
Orenbuch Louis
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