DE364645C - Keyboard instrument with mechanics that can be activated electromagnetically by contact buttons and a transposing switchover device - Google Patents

Description

Keyboard instrument with electromagnetically triggered by contact keys Mechanics and transposing switching device. The invention relates to a Keyboard instrument (piano, organ or di-1.) With solenoid triggered Mechanics (hammers, bellows, etc.).

Learning to play on keyboard instruments required so far years of training as there are twelve different keys, each of which can be set again in major or garbage. each of these keys previously set different ones Notes, accidentals and hand movements in advance, which had the effect on the player as if he had to learn not to play one, but 24 instruments. Further The usual instruments have the disadvantage that the keys can be played at the same time Tones (chords and the like) by pressing different fingers. One has to relieve piano playing already has transposing devices and octave couplings. built. In the former are z. B. the buttons to the associated levers of the mechanism on the side movable, and with the latter one has inclined rods and stair-shaped Above one another arranged keys. Such arrangements require one extensive structure and are therefore expensive. This is much easier Structure of keyboard instruments with electrically operated mechanics. One therefore has z. B. for keyboard instruments with strings set in vibration by electromagnets already several devices for regulating the timbre and circuits for simultaneous Suggested sounding of notes.

The well-known electric keyboard instruments are by the many Switch arrangements are confusing, therefore require the player to practice longer he can play the instrument fluently and make a later * installation of the Device in existing instruments.

The invention eliminates this night-rush. A mechanism known per se, which can be triggered electromagnetically by means of contact keys, is used. According to the invention, one or more switching bodies provided with rows of electrical contacts are switched on between the contact buttons and the electromagnets. On one side of the switching body, the rows of contacts are staircase-shaped, and on the other in a straight line and partly cross-linked, so that # by hitting one and the same keys, e.g. B. the seven adjacent white keys of the C major key depending on the setting of the switch body old major and minor keys can be played. Some of the keys, for example the white, are formed according to the invention in the manner of step keys from leaf springs, which are provided with contacts at the bottom, so that when an upper leaf spring is depressed, the contact of this and the leaf springs underneath is closed at the same time and lower tones sound at the same time. The drawing shows the subject of the invention in an exemplary embodiment, namely: Fig. I the overall arrangement of the line system, Fig. 2 a vertical section through the shift drum, Fig. 3 the arrangement of a step button in section, Fig. 4 a step delimb in plan view, Fig. 5, the cylinder surface of the shift drum unwound.

Between the keyboard A and the electromagnets 2 of the mechanisms (hammers, bellows, etc.) in the exemplary embodiment, a switching drum C is arranged (Fig. I), to which the lead wires L # d # rch Kontaktf coming from Aden contact keys i to 12 edern F ,. (Fig. I and,: 2) and d, ie lines 0 leading to the electromagnet B through contact springs F, are brought up. Between the rows of clamping screws K 'and K2, the lines are expediently combined in cables' if the keyboard is to be locally separated from your actual instrument for reasons of cheaper manufacture or to operate the instrument from a remote location, e.g. B. at Orgieln from the nave. Of the 'electromagnet B Üie leads Re INTR, R g to the power source St. of Üieser the line R continues -to the return rail RS, which in Fig. I sake of clarity before the keys in Fig. 3 in cross section in their correct position to the keys is drawn. In the course of the return line R, a known current regulator (regulating resistor, etc.) is expediently switched on at a suitable point in order to be able to adjust the tone strength as required, for example with a pedal.

The shift drum C consists of Isoliermateri #al (wood, glass or the like). On its periphery, for example, there are twice: 24 rows of button contactsE (brass nails or the like '). In each of these 48 rows there are as many button contacts as the keyboard A has keys (i to 12). In Fig. 2, a contacts per each (of the 48 rows shown at their ends is that, the shift drum with pins mounted (Figure i) One pin is connected to a pointer in connection of the selected character on a classification... indicates.

The contact buttons E are in the manner of the lines shown in the illustration on one side of the roller in a straight line and, sometimes crossing over, on the other side of the roller (Fig. 5 above), connected in a step-like manner by conductor wires.

If the shift drum C is set so that the contact springs FV F2 touch the contact rows i (Fig. 5 right), then the C major key is set. With key i the magnet for the tone is activated, with key: 2 that for c sharp, with key 3 that for d, with key 4 that for dis etc. When set to the contact rows: 2, pressing the same keys causes the tones for G minor to sound.

The keys for the other rows result from the divisions given in Fig. 5 on the right, lower half and in the arc of Fig. 2, in which D is major and M is minor.

So you can play any piece of music that is set in any major or minor key after setting the switch cylinder C accordingly, for example with the keys for C major, i.e. H. Play the seven white main keys next to each other.

To make the game even easier, the white keys 1, 3, 5, 6, 8, io, 12, are designed as multiple keys (Fig. 3 and 4). These consist of leaf springs stacked on top of each other in the shape of roof tiles. X, X, X " X, which can have a suitable covering (made of ivory, gallalite or the like) on their surface. These leaf springs are stored separately from one another between insulating material (Fig. 3) end, they carry a contact button, m at its rear end solder lugs., n, o, p. the lowermost leaf spring X forms, which in Figure i outlined basic key. From their Lötösem the line L leads directly to the associated KontaktfederF the Lötösenn, o , p of the leaf springs above X, X ", X, are connected by lines v (Fig. i) with lines L to the same triad (key 1, 3, 8, 1) or dominant seventh chord (keys 3, 6, 8, 1: 2) belonging to the basic keys. If you press the basic key, only the associated basic tone sounds. If you press one of the upper leaf springs, e.g. B. X ", then the current entering through R (Dep. 3) is simultaneously passed on to the three soldering lugsii4, n and o, so that by pressing a single finger vein a whole triad (e.g. key 1, 3, 8) sounds.

The switching and key arrangement described above can also be used for intent. instruments (phonola or similar) related. will. The electromagnets then do not work on the mechanics directly, but on the keys of the main instrument.

To achieve the tremolo effect, an arrangement can be used in a known manner be switched on with Wagner's hammer.

Claims (2)

PATENT CLAIMS: i. Keyboard instrument with through, electromagnetic contact keys, releasable mechanism and transpose-like switching device, marked # et: through one or more switch bodies (C) provided with electrical contact rows (E ), on one side of which # di-e contact rows (E) step-shaped and on the other are connected in a straight line and partly crosswise (Fig. 5), so that, depending on the setting of the switchover body (C), by striking the same, for example, the white buttons (1, 1 5 # 6; 8J io, 1 -9) every piece of music in any major or minor key can be played. 2. Keyboard instrument according to claim i, characterized in that some of the contact keys, for example the white (1, 3, 5, 6, 8, 1 o, 12), are designed in the manner of known step keys for mechanical octave couplings and are insulated from one another Leaf springs (X., X,., Xz #, XJ exist, -the end facing the player have a contact button and at their rear end soldered joints (m, u, o, p) , the lowest (m) with the the contact fingers (f) belonging directly to the basic key and whose upper (in, iv, o, p) are connected by secondary lines (v) with the lines (L) of the associated triad # or Dami-nants # eptiine chord tones.