DE202008005780U1 - String instrument of the violin family with asymmetric bridge and additional bass bar on the instrumental bottom - Google Patents

Abstract

string instrument with different length bridge feet, where the shorter web foot located on the instrument panel below the string with the highest Mood is underlaid with a bass bar instead of a Soundpost.

Description

Registered becomes the principle of transmission the string vibration of stringed instruments on the instrument body using a bridge with different length bridge feet. The shorter bridge foot stands on the instrument panel, which is reinforced by a "bass bar" (underneath the string with the highest pitch (for violins: E string). The longer one Foot leads through mounted in the ceiling (not thought as a sound hole!) hole under the string with the deepest tuning (for violins: G-string) up to an additional one arranged on the instrument floor "bass bars." The two "bass bars" are not together connected.

Annotation:

• 1. der lange Stegfuß nicht in der Position des einstigen Stimmstockes, sondern unterhalb der Saite mit der tiefsten Stimmung angebracht ist (hierdurch wird eine deutliche Verstärkung der Obertöne erzielt), dass
• 2. der lange Stegfuß nicht – wie bei der von Weidler beschriebenen „Chrotta" – durch ein Schallloch, sondern durch ein möglichst klein zu haltendes Loch in der Instrumentendecke geführt wird (so dass die schwingende Fläche so weit wie möglich intakt bleibt) und dass
• 3. keine gabelförmige Innenkonstruktion mit zwei Schenkeln verwendet wird, sondern sich ein herkömmlicher Bassbalken unterhalb der Instrumentendecke (allerdings unter der Saite mit der höchsten Stimmung) sowie ein weiterer Bassbalken am Instrumentenboden (unter der Saite mit der tiefsten Stimmung) befindet. Durch die Verwendung von zwei nicht miteinander verbundenen Bassbalken können Decke und Boden freier schwingen als bei der von Weidler patentierten Konstruktion.

The Gebrausmuster is a further development of the already described by Karl Weidler in his patent no. 953297 from the year 1956 principle of a bridge with two unequal length bridge feet. The submitted development is that:

• 1. the long bridge foot is not placed in the position of the former voice stick, but below the string with the lowest tuning (this results in a significant amplification of the overtones)
• 2. the long bridge foot not - as in the described by Weidler "Chrotta" - through a sound hole, but by a small as possible to hold hole in the instrument ceiling is performed (so that the vibrating surface as far as possible remains intact) and that
• 3. no two-leg bifurcated interior design is used, but there is a traditional bass bar below the instrument panel (but below the highest pitched string), and another bass bar at the bottom of the instrument (below the deepest string). By using two unconnected bass bars, the ceiling and floor can vibrate more freely than Weidler's patented construction.

The issues:

The conventional violin is constructed ( 1 shows a cross section of the violin at ridge height), that the bridge ( 1 ) on one side with the web foot ( 3 ) above the voice post ( 6 ), which is clamped between ceiling and floor, with the other web foot ( 4 ) above the "bass bar" ( 5 ), which is glued under the blanket and thus reinforced. By stroking the sides perpendicular to the bridge ( 2 ) is passed over the bridge feet ( 3 and 4 ) transmit the vibration to the ceiling ( 7 : Sound holes).

It is usually emphasized that the further transmission of the vibration to the ground via the 6 ) he follows. That this can not work, clarifies 2 , The blanket can not vibrate as a whole, but forms a knot at the point of the reed. Accordingly, the bridge acts almost exclusively as a one-sided lever, since there is no rash in the node in the sense of a vibration here.

Thus, the voice post divides the ceiling into different vibration surfaces with corresponding partial vibrations ( 3 ). Since the lowest vibration takes place in the area of the node, the voice pole can also transmit no vibration to the bottom of the violin. The result is that the resonance box instrument violin acts predominantly as a resonant board instrument.

Solution:

The new bar construction ( 4 ). Here one of the bridge feet transmits ( 3 ) the vibration on the ceiling, below the ceiling under the E-string instead of the vocal chord a "bass bar" ( 5 ) is arranged. Under the G string goes the other bridge foot ( 4 ) through a (just enough) hole ( 7 ) in the ceiling. This bridge foot is significantly longer and builds on an additional "bass bar", which amplifies the floor and transmits the vibration to the violin floor.For both the reinforcement and the surface propagation of the vibration both ceiling and floor need a "bass bar" ( 5 and 6 ), while a voice pole is completely omitted. Also, the "bass bars" are not connected.

By this construction ( 5 ) can vibrate both the instrument panel and the instrument floor freely and with a correspondingly higher amplitude over the entire surface. In addition to a higher sound pressure, this also results in a warmer sound due to the reduction of unwanted distortions that occur in conventional violins due to the division of the area by the voice post. What's more, the new bridge design means that the ceiling and floor are vibrated alternately, and that the resonance box can also be effective as such.

The Attaching the ceiling "bass bar" under the E-string This is especially important as the biggest ones are on the e-string personnel and rashes attack. This will produce a timbre rich in overtones allows which comes very close to that of a traditional violin. A page reversal of the bridge causes a dull and hollow, less transparent Sound.

Claims (3)

String instrument with different length bridge feet, where the shorter web foot located on the instrument panel below the string with the highest Mood is underlaid with a bass bar instead of a Soundpost. Stringed instrument with a hole in the instrument panel located below the string with the lowest tuning which not as a sound hole, but to carry out the longer web foot serves. This leads except for a second bass bar at the bottom of the instrument. String instrument with two unconnected bass bars.