DE1076475B - - Google Patents

Description

The invention relates to a fingerboard keyboard for string instruments such as guitars or lutes. Such. Keyboards in which the strings are no longer pressed down directly with the finger, but the desired chord tuning by pressing a button like when playing the bass-side accordion is achieved are known per se.

So fingerboard keyboards for stringed instruments are known in which each of the individual keys simultaneously several pressure pieces are actuated, the assigned with the effect of chord fingerings Press the strings against the corresponding frets. The pressing is done purely mechanically - either directly or indirectly via lever linkage. However, these keyboards have the disadvantage that they can only be built for a very limited number of chords and that the for Pressing the six strings requires pressure to be exerted on only one key at a time.

In our long-lived time, musical instruments become which can be played by anyone without a long period of apprenticeship. Playing string instruments, Playing the guitar and the lute, in particular, requires a lot of practice. Since there are several hundred If there are chords, it is impossible for the player to memorize the corresponding fingerings for each chord. When playing for a long time, pain and swelling often occur on the gripping fingers Make further play uncomfortable or completely impossible. In addition, ugly corneas form noticeable on the fingertips. Many would like to play stringed instruments, but their fingers are too strong, so that they are unable to grip the strings without simultaneously grabbing the ones next to them Mute strings. Older people can often no longer learn the guitar and the lute because their Fingers are already too stiff for the string play that places high demands on flexibility. Lots of musicians want to use the jazz guitar as a secondary instrument, but shy away from the difficulty of playing chords and the long apprenticeship. Children often cannot learn to play the strings because their hands too small and their fingers too weak. The invention is based on the problem of the very difficult To simplify the grip technique in such a way that the player can select the desired one by pressing only one button at a time Reached the chord tuning of his instrument and then can strike the particular chord, as well as to significantly reduce the contact pressure for pressing the six strings. According to the invention this is achieved in that each pressure piece is brought into its pressure position by its own electromagnet can be transferred, with all magnets of the pressure pieces belonging to a chord connection in the same Fingerboard keyboard for string instruments

Applicant:

Karl-Heinz Johannsmeier, Karlsruhe-Aue, Brühlstr. 66

Karl-Heinz Johannsmeier, Karlsruhe-Aue, has been named as the inventor

Lying circuit that can be closed by the associated push button.

Embodiments of the invention which work according to the moving coil principle are shown in Fig. 1 (relay for add-on device) and 2 (relay for built-in device). If current flows through the coil 1, the soft iron core 2, which is guided in the housing 3, is pulled into the coil and presses the guitar string 6 onto the fret board 7 with the rubber buffer 4, which sits on a non-ferrous flange 5 of the attachment device. If the circuit is interrupted, the spring 8 pushes the soft iron core back into the starting position. The string is released.

These relays are switched with pressure contacts 9 (Fig. 3) so that when you hold down a pressure contact button 10 address at most as many relays as the musical instrument has strings. Will the circuit interrupted by releasing the pressure contact button, the pressed strings become like released as described above. Briefly releasing the pressure contact buttons dampens the strings, which is important when playing modern dance music. A circuit diagram for a push button is provided Fig. 3.

The switching principle for a device for playing all chords of the first position is shown in Fig. 4. The inscribed letters in Fig. 4 and 5 indicate the string tuning of the guitar or lute and the lines below indicate the position of the strings. For the sake of clarity, only some of the most difficult chords, namely F, B ^b , B ^b7 , B ⁹ , D ^b9 , F ⁹ , are switched in Fig. 4. In this version, the remaining bunches can be used in the conventional way for runs, etc.

If you want the chords in different positions, you can also use the still free bundle relays can be attached.

909 757/46

In order to save pressure contacts, according to the invention, the relays can be operated by pressure switches 11 (Fig. 5) be divided into different groups, so that you can, for example, after pressing a push button the same chord timings in a higher or lower register, Fig. 5 clarifies the aforementioned using the circuit for the F major chord in the first and eighth positions. In Fig. 5 only those for the Representation of the necessary relay in F major. The device can be used for different voltages be built.

Claims (2)

Patent claims: 1. Fingerboard keyboard for stringed instruments with : Aiidruckstückcn actuable by buttons for the strings, characterized in that each pressure piece can be transferred into its contact pressure position by its own electromagnet, with all magnets of the pressure pieces belonging to a chord connection are in the same circuit as the associated push button is closable. 2. fingerboard keyboard for string instruments according to claim 1, characterized in that A switch to different relay groups can be made by means of the pressure switch (11) can, so that once over the lower collars (1st, 2nd, 3rd and 4th fret) and then over the Upper frets (e.g. 8th, 9th, 10th and 11th fret) lying relay the same chord in different Locations. Considered publications:
U.S. Patent No. 2,669,151. 1 sheet of drawings