DE1064C - Aliquot pianoforte construction for all types of pianoforte - Google Patents

Description

1877.

Class 51.

J. BLÜTHNER in LEIPZIG. Aliquot pianoforte construction for all types of pianoforte.

Patented in the German Empire on August 5, 1877. Longest duration: February 10, 1891.

The drawing on sheet II is divided into five fields I, II, III, IV, V for a quick overview divided.

The average drawing on sheet I.

At A in the III., IV., V field there are four or five vocal pegs for each tone, three of which are intended for the fundamental tone, the rest for the overtone.

As before, the strings for the fundamental go through the agraffes at B and through the bridge pins in the soundboard bridge to the attachment pins.

The overtone strings go through the rear, higher clasps at B, the double clasp row in the voice post through the clasps at C and from here to their pegs at D.

For the upper notes in the discant two overtone strings are placed, which are superimposed in their agraffes at B and C (see average drawing). The top one descends from C and is attached to D next to the bottom one.

The overtones are one octave higher than the fundamental and have half of this Scale length.

The agraffes of the overtones at C stand on their bridge G, which is glued to the soundboard from the dotted middle to the end line (towards the attachment plate); the front part, on which the clasps are screwed, is free in order to allow the vibrations of the soundboard to develop in the most extensive manner.

In the fifth field, bridge G is connected to the soundboard bridge, and the overtone strings are laid in full scale to the fundamental strings. The lengthening and strengthening of the tone is also achieved through this, but at the same time the screaming and screaming sounds are avoided, which would be inevitable if one wanted to let the octave sound along with these highest discant tones.

The first soundboard bridge is in a free position for the over-wound strings and in none Crossing with other strings.

The second soundboard bridge takes the smooth strings in the II. Field, which over the The strings of the third bridge run away and thus cross with them.

The third soundboard bridge, intended for the strings of the other notes, runs through fields II, III, IV, V and also touches I, in field II, as already noted, he moves under the strings of the second soundboard bridge.

E is the damper, which in the III., IV., V. fields has double damper wedges on the damper blocks to dampen the fundamental and overtones.

In the average drawing of the damper, the indicated five points show the position of the strings at.

In order to produce oscillations of the overtones more easily, the upper tones are weaker Numbers of strings taken as corresponding to the fundamental notes in question.

With this system, the strings that are above the strings of the fundamental tone can be an octave lower, like the combination tones, can be stretched, or three strings in the triad, or following the sequence of overtones (octaves, duodecime, etc.); at all this idea can be developed further.

For the voting process, this is the relationship shown and described in the drawing most practical because the strings are very easily stretched, removed, or wound up can, without the tuner falling into any doubt in this process can.

The aliquot system is for all types of the pianoforte instrument. In the case described here, there is upper damping used, but with straight-stringed instruments there is also underdamping let apply. ■

For this purpose 2 sheets of drawings.