DE2150330A1 - Sounding notepad for music lessons - Google Patents

Description

DRERICHNEUGKBAUER PATENT Attorney 1 Λ - O 9 C O MUNICH 26, POST BOX 31 I A ^ / 5 2

U ie 0

Max Honegger 8143 Sellenbüren

(Switzerland)

Sounding note board for music lessons

The invention relates to a sounding note board for music lessons, with conductor rails located below the surface, each assigned to a tone level, which are equipped with switching devices are connected for switching on the tone generators assigned to the tone levels.

There are sounding note boards for music lessons known, with which run under and between the staff lines Conductor rails are arranged, each of which is connected to an electric tone generator through which the Showing a note by means of a stick which is also connected to the electric tone generator The tone corresponding to the note level is made to sound. In one of the well-known note boards of this type, the Conductor rails on the surface of the board, and the activation of an electric tone generator is carried out by galvanic Contact between the conductor rail and the pointing stick.

In another known note board of this type, the electrical conductor rails are under an insulating writing

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layer, which enables perfect labeling of the board will. The conductor rails are each connected to a tone generator via a switch, while the tone generators are connected to a central one Amplifier is connected downstream, which is connected to a loudspeaker. A tone generator is activated by touching the Board triggered by means of a pointer that is connected to the board by a cable. The ladder rail and pointer are in contact an alternating voltage, and when the panel is touched, a AC circuit containing a relay, capacitively closed. With this music table it is uncomfortable and disadvantageous that one when touching the tip of the otherwise insulated pointer receives an electric shock, and it is also considered a nuisance felt that the pointer is connected to the note board by a cable.

It is also desirable in the design of music lessons as part of an audio-visual lesson, the notes that are being presented acoustically are also visually visible do. In addition to the conventional writing of notes with blackboard chalk, it is also desirable to write individual notes, chords or Show melodies by attachable magnets. There are wall panels known which consist of an iron plate or are coated with ferrous substances so that permanent magnets that can be attached easily adhere to the board. This concept leaves however, not simply according to a sounding note board assigned to the invention. Because the under the board surface

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arranged electrodes may only have an extremely small distance from the surface, so that the proximity switches at Touching the electrodes respond properly, it is not easily possible to have a board with the necessary electrodes and to produce an iron or magnetic layer that meets the high service life and quality requirements required for rough school operations. For electrical reasons, the iron or Magnetic layer must not be placed between the electrodes and the board surface, otherwise the electrodes will be shielded and would no longer respond. On the other hand, the embedding of conventional electrodes requires such a layer thickness that the arrangement of an iron or magnetic layer under the electrodes does not readily lead to the desired result, since the distance between the iron layer and the attachable magnets is too large to allow the magnets to adhere properly.

It is the object of the present invention to create a music table, which works without a pointer and cable.

Another object of the present invention is to choose the material and the sequence of layers for the panel so that the Note board can also be used as a magnetic board.

These objects are achieved according to the invention in that the switching devices in connection with the conductor rails as Proximity switches are formed, which by touching the

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Surface can be actuated at the desired point of the note image, with a through the conductor rail the input of the associated Switching device supplied certain signal level under the influence of the body capacity is exceeded or fallen below, in such a way, that when the specific signal level is exceeded, the tone generator assigned to the relevant switching device is switched on will.

By suitable choice of the material and the layer thickness for the writing surface, the electrodes and the necessary insulating layers, 'can be the distance required to solve the second task produce.

In order to ensure reliable switching even in the case of a weak spatial field, such as in a building with strong shielding, can expediently a line connected to an alternating voltage generator in the Board built in or located in the vicinity.

Due to the special arrangement of the conductor rails and the design of the "board surface", it is possible to create a board that is particularly suitable for music lessons for the blind.

By simply touching the note board, for example with a pinger, can be made to sound on such a note board by touching several at the same time Fingers can also play chords, which is not possible with just a pointer.

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In the following, exemplary embodiments of the invention are explained in more detail with reference to the drawings. Show it:

Pig. 1 the block diagram of a tone level with the associated semitones,

Fig. 2 shows an embodiment of the proximity switch 11, 12 according to Pig. I,

3 shows the schematic representation of a ring line for generating an alternating electric field, and

Fig. 4 is a perspective view of a usable as a dummy panel Embodiment.

The music board has the notes attached to a board body Corresponding conductor rails, which are insulated and shielded from one another and under the board surface, in particular lie under a writing layer containing the staff lines. The electrical device is for example on the edge of the board arranged along a narrow side and let into a recess in the panel body.

The electrical equipment of a single tone level exists in accordance with 1 from a conductor rail 11, which is connected as an electrode to a switching device 12 and is provided with a shield 13 is shielded from adjacent conductor rails, a tone generator 14 for the fundamental tone and two tone generators 15, 16 for the lower or higher semitone, as well as a socket 17

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in the supply line from the switching device 12 to the tone generators, e | .nem switch 18 for blocking the tone generators, a Changeover switch 19 for assigning the fundamental tone generator 14 or a semitone generator and a changeover switch 20 for assigning the tone generator 15 for the lower semitone or the tone generator 16 for the upper semitone. All tone generators are connected in common to an amplifier 21 which is connected to a loudspeaker 22 is. The socket 17 is intended for the connection of other tone generators, e.g. those with a different timbre, or for the connection of an electronic musical instrument, e.g. an organ, whereby from the music board to the organ or from the organ keyboard can be played on the music board. However, a signal lamp for the Optical tone indication can be connected, whereby different colors can be selected for the individual tones.

The switching device 12, which together with the electrode 11 forms a capacitive proximity switch, is shown in greater detail in FIG shown. It contains the series connection of a resistor with a capacitor 24, the resistor 23 at negative Potential and the capacitor 24 is at the positive potential of an external voltage source via a resistor 25. As Electrode 11 formed by a conductor rail is coupled to this circuit via a capacitor 26. Also on this input voltage divider is the base of a transistor 27, the collector of which via a potentiometer 28 and a resistor 29 is positive

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Potential is and via a resistor 30 with the base of a " second transistor 31 is connected, at the collector of which is a relay 32 for operating the tone generator. The emitters of the. both transistors are connected via a common resistor 33 negative potential.

In the idle state, when the note board is not touched, a weak flow flows in the collector-emitter circuit of the first transistor Current determined by the value of resistors 28 and 29.

At the base of the transistor 31 there is a negative emitter potential, as a result of which the transistor is blocked. If you touch the note board at one point on the conductor rail with your finger, it picks up a much stronger room signal due to capacitive coupling. This room signal is amplified by transistor 27 and generates a higher voltage drop across resistor 29. This changes the base potential of transistor 31 via resistor 30, making it conductive and causing relay 32 to respond and thereby switching on the associated tone generator. So that the relay 32 picks up reliably and does not flutter, a capacitor ~ 5k and a diode 35 are connected in parallel to it to smooth the amplified alternating voltage.

As soon as you remove your finger from the note board, which causes the the room signal recorded on the conductor rail is weakened, the second transistor 31 remains blocked, the relay 32 is de-energized and switches off the tone generator. The pickup voltage for the second

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Transistor 31 can be easily adjusted by means of potentiometer 28.

It is advisable to connect the note board to an alternating voltage generator connected ring line, 'which creates a constant spatial field that is always sufficient to be touched to make the switching device respond. Fig. 3 shows as an example a ring line with two Loops 36, 37 which are connected to an alternating voltage generator 38. Such a ring line can advantageously be laid along the lower edge of the board behind the writing layer or at any other point in the area of influence of the Board be arranged.

Of course, it is also possible instead of the one described capacitive proximity switch any other switch of this Type to be used, the switching state of which changes when approaching the assigned conductor rail.

To refine the sound image, a so-called wind generator 40 can also be provided, which consists of a noise generator for a certain noise spectrum and which one can be set to the generally sinusoidal signal of the tone generators Percentage of desired distortions superimposed. The wihdgenorator can either, as indicated in Fig. 1, directly the outputs of the tone generators can be connected in parallel, or it can be switched to each tone generator individually, for example by distortion the supply voltage. Through this wind generator

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can for example be the blowing effect of flutes or other wind instruments can be simulated. This results in a more pleasant sound than the undistorted sinusoidal signal the tone generators is given.

To facilitate music lessons, it is beneficial to be on the Board certain note sequences, for example a melody, quickly through another note sequence, for example another melody, to be able to replace. For this purpose, the board is covered, for example, with a thin layer of felt, which extends through, for example Print or adhesive fastenings can be easily applied and removed again and on which notes or with a rough surface Characters can be attached.

It is also possible to place foils, e.g. plastic foils, on the board, preferably transparent ones with the notes and Foils provided with characters are used Press notes as well as through such a slide.

Of course, it is also possible to design the board in such a way that it is suitable for music lessons with the blind. In this In the case of cases, orientation signs are placed on the surface of the board, which can be perceived with the sense of touch, so that by simple Touching the surface of the board at the so-called places the board can be made to sound. Should such a

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Note board used exclusively for lessons with the blind the application of staves and the design of the surface of the board as a writing layer can be dispensed with,

According to the embodiment shown in FIG. 4, the contains Table 1, which corresponds in its essential details to the table described above, orientation lines 2, which opposite the panel surface 3 can be raised, the extent of the elevation in the figure, however, is shown greatly exaggerated. ) Below these orientation lines 2 or below the spaces are the conductor rails embedded in the board, which are equipped with switching devices for switching on tone generators are connected. Each orientation line 2 is assigned a specific pitch.

With regard to the viewing direction A of the panel user, the orientation lines 2 run vertically in this example and not horizontally, as in an example with the usual ^ Staff lines is the case. Such a course points to instruction for the blind significant didactic advantages. Since the blind cannot read the musical notation anyway, one only needs to be blind the system of instruction that has been discontinued to be incompatible with the general system in use.

The extent of the elevation of the orientation lines 2 in relation to the board surface 3 is dimensioned so that it is sufficient for safe and easy scanning without sliding over the Orientation lines are made difficult.

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Of course, instead of the orientation lines 2, any other raised characters can designate those places on which assigned conductor rails are located under the surface of the board.

In a particularly advantageous manner, the board is designed so that it can be covered with thin foils, on which, for example teaching programs are plotted in Braille. However, the thickness of such a film must not exceed a certain amount step so that the capacitive proximity switches, which are connected to the conductor rails below the surface of the board, speak safely when touching the film surface. In this case, orientation signs can be placed directly on the surface of the board may be superfluous, so that a board with a perfectly smooth surface can be used. The used Foils or matrices can be attached to the board surface in a simple manner, for example with the aid of press studs 4. However, any other fastening options, e.g. Velcro fasteners, can also be used. Such attachments make the The film is brought into the desired defined position in relation to the conductor rails and, on the other hand, against unintentional slipping secured.

A preferred exemplary embodiment of a note board suitable for placing holding magnets on consists of a cross-section supporting layer, which is for example impregnated kraft paper

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it

(Phenolic paper) contains. Above that there is an adhesive _{layer a} which has a layer of sheet iron or a permanently magnetized layer. There is another adhesive layer on top, which creates the connection to an insulating layer made of impregnated Kraft paper. This insulating layer has a thickness of 50 μm, for example. Above that there is a layer which contains the electrodes and which consists, for example, of a copper-clad plastic film or an insulating film coated with conductive varnish. This film has, for example, a total thickness of about 20-75 A ¹ ro. Above is another layer of impregnated kraft paper, for example 50 px m thick, and, if necessary, the writing surface, which is preferably provided with raised staff lines and which is approximately 50 μm thick.

To produce the panels, the layers mentioned are used in one pressed together in a joint operation, which results in an extremely solid and durable board. The distance between the The writing surface and the iron or magnetic layer is like that little that magnetic or iron plates attached to the surface adhere very well.

In a particularly advantageous manner, the staff lines are slightly raised compared to the writing surface, so that the staff lines are can also be easily felt.

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■ The attachable magnetic or iron plates are preferably formed as note heads and provided for easy identification of either different time values of the notes or different pitches with a Parbcode. It is also possible to use other note symbols _3, for example fairy tale characters, which for didactic reasons prove to be particularly advantageous for small children, as attachable magnetic or iron plates.

Of course, the blackboard can be made entirely of flexible Material be made so that it can be easily rolled up and transported. Since the conductor rails are on a flexible film are applied, and since the connections can be applied to the same film, for example, it is practical, a plug connection on the top or bottom of the panel to provide which the connection to the other switching devices manufactures. At least a part of these holding devices can be accommodated in a housing in which the board can be rolled up.

All information and features contained in the documents, in particular the spatial configuration of the subject of the application, are claimed as essential to the invention, insofar as they are new to the state of the art ο

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Claims (1)

Claims (\ y Sounding notation board for music lessons, with conductor rails located below the surface, each assigned to a top level, which are connected to switching devices for switching on tone generators assigned to the tone levels, characterized in that the switching devices (12) in connection with the conductor rails (11) are designed as proximity switches, which can be actuated by touching the surface at the desired point of the note image, whereby a certain signal level supplied by the conductor rail to the input of the associated switching device is exceeded or fallen below the influence of the body capacitance, such that when the certain signal level of the respective switching device associated tone generator (14) is switched on. 2. Note board according to claim 1, characterized in that each switching device (12) has at least one electronic switch '(31), which via a bias network (23,24,25) so is connected to the associated conductor rail (11), that the Switches locked in the idle state (3D opened when the certain signal level picked up by the conductor rail is exceeded will. 3. Note board according to claim 2, characterized in that between the switch (3D, which consists of a transistor _a and the bias network (23,24,25) a transistor amplifier (27) - 14 - 209819/0032 is arranged to amplify the signal level picked up by the conductor rail (11). . 4. Note board according to claim 2, characterized in: by setting means (28) for setting the response sensitivity of the electronic switch (3D 5. Note board according to claim I _9, characterized in that each. Sound stage in the connecting line between the switching device (12) and the sound generator (14) a plug connection (17) and a switch (18) are installed. 6. Note board according to claim 1, characterized in that each tone level In addition to the tone generator (14), two semitone generators (15, 16) are provided, which are half a tone lower or higher swing as the tone generator (14), as well as switch (19 »2O) for optionally turning on these halftone generators. 7 «Note board according to claim 1, characterized in that in the Panel or in its immediate vicinity a line (36, 37) connected to an alternating voltage generator (38) for the generation a constant space field is arranged. 8. Note board according to claim 1, characterized in that the tone generators (14, 15, 16) are assigned a noise generator (40). 9. Note board according to claim 1, characterized in that the with a board provided with a writing surface has an iron or magnetic layer, which is at such a distance from the writing - 15 - 209819/0032 covering surface is arranged that attachable magnetic resp. Iron flakes adhere to the surface. . . - 10. Note board according to claim S _3, characterized in that the iron or magnetic layer is arranged under the electrodes as seen from the writing pad surface. 11. Note board according to claim 9, characterized in that it has the following layer structure: . a) writing pad. b) insulating layer c) carrier layer coated with an electrode pattern d) insulating layer e) adhesive layer f) iron or permanent magnet layer g) adhesive layer h) carrier layer 12. Note board according to claim 9, characterized in that the Staff lines are raised on the writing pad surface. 13 · Note board according to claim 9, characterized in that the attachable magnetic or iron plates are provided with different color markings, 14. Note board according to claim 9, characterized in that the Magnet or iron plates have the shape of symbolic figures. - 16 209819/003 2 "1-5 · Note board according to claim 1 _3, characterized in that the conductor rails are arranged vertically in the board with respect to the intended viewing device, and that the orientation lines associated with the conductor rails are raised on the board surface or on a film that can be placed on the board surface, so that they can be perceived with the sense of touch when you feel the surface of the board. 16. Note panel according to claim 15> characterized in that fastening means are provided on the film programmed Tafeloberfläehe unverrutschbaren for placing a with raised characters, for example in braille. 17. Note board according to claim 1, characterized in that it is made entirely of flexible material. 18. A method for producing a music board according to claim 11, characterized in that the material layers forming the board be pressed together in a single operation. 19. Use of a note board according to claim 1, in connection with one which can be placed on the board surface and removed again labeled slide. - 17-2 098 19/00 32