DE107355C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

CLASS 51: Musical Instruments.

GUSTAVE FRANTZ LYON in PARIS. Chromatic harp.

Addendum to patent 100014 of March 17, 1897.

Patented in the German Empire on April 9, 1899. Longest duration: March 16, 1912.

The present invention has perfection in the attachment of the strings in FIG Chromatic harp, which is protected under No. 100014, is the subject matter.

In the harp protected under no. 100014, the strings a ^{l are} attached to the tuning pins of the upper vertebral body on the one hand and to the attachment pins b ¹ on the other (see Fig. 1), the strings at a} d ^l i> ^x the harp of that patent and in adb the present perfection of the attachment of the strings in the sound body. Each string is passed through a hole d ¹ breaking through vertically in the sound plate e and the reinforcement pieces /.

With this hitching device, the strings form two knees when they pass through the soundboard e, and the friction of each string in the soundboard is so considerable that in practical terms the string a ^{1 can be} regarded as a string attached directly to the soundboard, the one between the soundboard and The part of the string located on the attachment pin b ¹ serves only to connect the soundboard to piece c.

Experience has now shown that these small fractions of the strings do not expand and consequently are not very elastic. If z. B. at the end of a similar fraction of the string a weight is attached and on this weight a pull from top to bottom is exercised, this weight does not decrease, so to speak. But if a similar weight attached to a small helical spring and the same procedure repeated, it is observed that this weight raised above its initial position and then successively above and below its equilibrium is brought.

It is evident, then, that when the soundboard e is connected to piece c by a large number of inextensible fractions d ¹ b ^l , the sound board is completely prevented from vibrating, since the various points d ^{1 are} fixed. If on the other hand between the points d ^l and b ¹ is a coil spring g is turned on, as shown on the left side in Fig. Ι, the point d of the soundboard free, said soundboard can swing accordingly, and this was indeed completely confirmed by experience.

Feathers have long been inserted between the strings of the musical instruments, but only to preserve the tone of the string. These springs are usually parallel arranged to the sound floor and can therefore not change its vibration capacity. Furthermore, as will be described below, it is not essential that the Coil springs are attached directly to the strings. The strings can for example attached to the soundboard and there can be a certain number of coil springs between

Claims (3)

the soundboard and piece c . In the device shown in FIG. 1, the force exerted by the string on the soundboard cannot be regulated. To achieve this purpose, a small Stofsknagge h can be attached to the free end of the helical spring g (Fig. 2), which is, for example, hemispherical and provided with a hole through which the end of the string is passed. The dimensions of the spring are in such a way that, after the spring has been attached, the stofsknagge h attached to it protrudes a little from the corresponding opening in the sound panel; this distance is slightly smaller than the expansion of the spring under the action of the string. The Stofsknagge h is consequently pressed against the sound base with a force corresponding to the available fraction of the spring extension. In this way the force exerted on the soundboard of each string can be limited to any part of its tension without thereby influencing the spring force of the string obtained by the device according to FIG. It is clear that the number of coil springs g can be reduced by using the device shown in FIG. This device consists in that the strings α directly on the Schallboden'e by any suitable holder, e.g. B. by means of an inserted into the hole d pin z.
. One end of the springs g is attached to the suspension pins b and the other end to the soundboard, in which holes j are provided parallel to the strings. The upper end of each spring is threaded on which a knurled nut can be adjusted; an approach η serves as a support point for this screw nut in the regulation. Of course, the springs can also be attached to the soundboard e and the nut m can be attached to piece c; the two ends of the springs can also be fastened and the adjusting device can be arranged between the sound body e ″ and the piece c. P a ten τ-claim e: ι. An embodiment of the chromatic harp protected under No. 100014, in which - ■ to increase the sound effect of the instrument - coil springs (g) are inserted between the soundboard (e) and the metal pieces (c) holding the attachment pins, in such a way that it has one end attached to the attachment pins (b) and the other end to the lower part of the strings (Fig. 1). 2. A modification of the embodiment characterized by claim 1, characterized in that the helical spring (gj, which is attached at one end to the towing pins, has a hemispherical or otherwise appropriately designed Stofsknagge (h) at its other end, on which the string is attached, and which abuts against the soundboard when the string is struck, for the purpose of allowing regulation of the stress on the soundboard resulting from the string (FIG. 2). 3. An amendment to the. Embodiment characterized by claim 1, characterized in that the strings are attached directly to the soundboard (e) , and the latter is connected to the metal piece (c) by helical springs, the tension of which can be regulated, for the purpose that the strings on the To compensate for the pull exerted by the sound floor (Fig- 3) 1 sheet of drawings.