DE590528C - Bass mechanics for chromatic harmonicas - Google Patents

Description

Which have reached the leadership until today Bass tuners for chromatic hand harmonics are either built in such a way that you can play ready-to-play chords and basic basses or just single notes. at In both types, the tones themselves are amplified by one or two higher octaves. the first execution is imperfect from the musical point of view as the player is bound to the existing chords and cannot play any unharmonious, broken or incomplete chords; the second type is imperfect because chord accompaniment, i.e. H. constant gripping of several keys that is too difficult to play.

The present invention now has a bass mechanism, which a significant More versatile game allowed, but without any inconvenience as well in particular can be done without noticeable interruption of the game, d. H. it can be switched from one variety to the other without audible interruption. You then have two rows on the one hand

he basic bass, where five when you press a button Octaves sound at the same time, as well as four rows of ready-to-play chords, each made up of three tones exist and in which each tone is amplified by the two next higher octaves on the other hand, as is generally the case with the bass machine heads manufactured today three times two rows of individual tones with a tone range of three octaves in total, where every two rows one octave Um:

fang and each of the tones is amplified in turn by the two higher octaves will.

The most fundamental and most important innovation in this invention is the shaft bearing, which consists of 24 individual shafts which can be rotated about their own axis and which are mutually displaceable in such a way that the first, third, fifth, etc. wave in one and the second, fourth, sixth, etc. Shaft can move in the other direction.

The subject matter of the present invention is shown in the drawing in an exemplary embodiment explained in more detail.

Fig. Ι is a cross section through the bass case, where the cut, since it is of no importance for the description of the invention, instead of six rows of keys, only is represented by three rows of buttons.

Fig. 2 shows a top view of a row of flaps with their control levers.

Fig. 3 shows a plan view of the slides with their guide strips that correspond to the in Fig. 2 include the row of flaps shown.

Fig. 4 shows the shaft bearing with the device for moving the individual waves.

Fig. 5 shows the side-by-side key push rods in a top view for both Settings of the shaft bearing. (The fingers attached to the shafts are for each of the key push rods redrawn. For the sake of clarity, the

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Designation of the fingers only once there, and on the shaft from which the relevant one is concerned Finger goes out.)

Fig. 6 shows a locking device in plan view.

In the bass housing ι tone air flaps k _t to k _s , which control the generation of the same tones but different octaves, are arranged in a staggered manner. In the following, the description is only carried out for one of these valve sets. The arrangement is repeated for the other movements, i.e. for the other eleven tones of the chromatic scale.

The keys S ¹ , D, T are guided in strips 5, 6 and 8 with the aid of their push rods 25, 26, 27. The push rod 25 of the key S is provided with drivers b, e, h which, when the key S is pressed, press on fingers 12, 13, 15, which thereby rotate the shafts of the shaft bearing A on which they sit. As a result, the fingers sitting on the other side of the rotated shafts and pointing in opposite directions are pivoted, such as, for example, the downwardly standing finger 17, the counter-finger of the finger 12, which thereby moves a slide 24. This slide in turn acts on the extensions 19 of the flap levers J ₁ , J ₂ , J ₃ , which are bent at the axis W ₁ , as a result of which they are pivoted and the sound air flaps k _lt Ii ₂ , k _{s are} opened. The opposing fingers of fingers 13 and 15 are not shown for reasons of clarity. They move two slides corresponding to slide 24 and thereby open the flaps k _lt L ·, k _{s of} two other sets of flaps, ie the flaps Jt ₁ , k ₂ , k _{s of} two other tones. In this way, a chord of three tones is created, with each tone sounding in three different octaves. The flaps are closed again by springs F after the button is released and the button itself is returned to its old position.

In principle, the same thing happens when you press button D. Here, fingers 12, 13, 14 are set in motion by drivers c, f, g. The finger 11 is not moved; then (as can be seen in FIG. 5a.) the driver α passes the finger 11.

If the key T is pressed, the flaps It ₁ , k ₂ , £ 3 are opened in the manner already described by the driver pin d and the finger 12. The driver i rotates a shaft of the shaft bearing B through the finger 20. By the. The lever 9 connected at the pivot point 30 is the pivot rod J ₄ rotatable about the axis W ₂ and thereby the flap fe ₅ attached to it is raised. The same lever J _{4 also} opens the flaps k _s and £ ₄ by reaching under at 28 and 29.

The fact that flap k _{s is raised} from both sides does not matter if the point of application 28 of lever J _{4 is} high enough above flap k _s so that it can also _{be opened by lever J 3} alone, without lever J ₄ to post.

If you switch the register lever ii rotatable about X (Fig. 4) on the finger piece R (the continuation of the lever H broken off in Fig. 4 and the finger piece R can be seen in Fig. Ι), the two plates 10 are activated by the lever 34 and the shafts of the shaft bearing A, which are rotatably fastened in the plates 10 by the transverse journals 31 and 32, are displaced against one another. As a result, fingers 11, 12, 13, 14, 15 as well as 16 and 17 are also shifted. (The points of intersection of fingers 11 and 12, 13, 14, 15 must still be under the short catches a, c, d, e, f, g, h , otherwise the keys can collapse.) Fingers 16 and 17 have Recesses 35 (Fig. 3) of slide 23 and 24 clearance. The fingers 11, 12, 13. 14 and 15, on the other hand, now have a completely different relationship to the driver pins a, b, c, d, e, f, g, h (Fig. 5). The shafts to which the fingers 12, 13, 14 and 15 are attached have been shifted so far that the fingers c, d, £>f>i> h are no longer taken along by the drivers c, d, £>f>i> h. The driver b is longer than the others and can still go on. attack the finger 12 when the button is pressed. The finger 11 comes from a shaft that has been moved in the other direction, and is now so that it can be moved by the driver α.

Now the key S only opens the flaps A ₁ , k ₂ , k _{s of} a tone, because the fingers 13 and 15 are no longer moved when the key is pressed. When the key D is pressed, the shaft to which the finger 11 is attached is rotated, and the other finger 16, which is attached to this shaft, moves the slide 23, which is attached to the extensions 19 of the lever J ₂ , which are bent off at the axis W _1. J ₃ and m attacks and so the flaps k ₂ , A ₃ and k _t opens. The springs F on levers J ₂ , J ₃ and J ₅ bring the flaps back to their old position after releasing the key. Key T finally only opens the flaps k _s , k _t and k _s .

To prevent the switch from being made when a key is pressed, and that important parts of the mechanism, especially the fingers up to 15, are bent, the comb-like cut-out plates 33 (Fig. 4 and 6), which are connected to the Bass housing 1 are rigidly connected. When moving the shafts of the shaft bearing A,

ie when the register lever H is actuated by the finger piece R, the somewhat elongated fastening pins 31 can only pass through the plates 33 when they are in their rest position. (See also Fig. 6, in which a shaft and thus also a pin 31 are not in their rest position.) The plates 33 are so thick that no key can be pressed if the register lever H or the finger piece R is not exactly is in one of its • basic positions.

Claims (4)

Patent claims: i. Bass mechanics for chromatic hand harmonics with slidably mounted carrier shafts, characterized in that the shafts of the shaft bearing (A) can be shifted in relation to each other in the longitudinal direction and by means of appropriate mito-fingering arrangement! become playable. 2. Bass mechanism according to claim 1, characterized in that the driver fingers (α, b, c, d, e, f, g, h) are designed in two different lengths, so that the long drivers (b) their assigned 3.) Move the subordinate finger (12) in both settings of the shaft bearing (A) through the register lever (H) , while the short drivers (a, c, d, e, f, g, h) through the two settings of the shaft bearing ( A) move their associated fingers (11, 13, 14, 15) on the one hand, and on the other hand slide freely past them. 3. bass mechanics according to claims 1 and 2, characterized in that the bent extensions (19) of the sound air valve lever (s _v S ₂ , J ₃ and m) are controlled by two slides (23, 24) such that each of the two slides another combination of extensions (19) is pivoted, thereby opening a corresponding different combination of sound air flaps and each of the two slides (23, 24) is moved by a special shaft or the fingers (16, 17) attached to it. 4. bass mechanics according to claims 1 to 3, characterized in that two locking plates (33) are provided in such a way that the keys can only be pressed in one or the other basic position of the register lever (H) and that the register lever through the finger piece (R ) can only be switched when no key is pressed in order to prevent interference with the bass mechanics, in particular bending of the fingers (11, 12, 13, 14 and 15). 1 sheet of drawings