EP0169155A1 - Verstärkungsrippeneinheit zur Befestigung an der Decke und/oder dem Boden eines Klangkörpers - Google Patents

Verstärkungsrippeneinheit zur Befestigung an der Decke und/oder dem Boden eines Klangkörpers Download PDF

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Publication number
EP0169155A1
EP0169155A1 EP85430013A EP85430013A EP0169155A1 EP 0169155 A1 EP0169155 A1 EP 0169155A1 EP 85430013 A EP85430013 A EP 85430013A EP 85430013 A EP85430013 A EP 85430013A EP 0169155 A1 EP0169155 A1 EP 0169155A1
Authority
EP
European Patent Office
Prior art keywords
bars
transverse
dam
soundboard
longitudinal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP85430013A
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English (en)
French (fr)
Inventor
Joel Laplane
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0169155A1 publication Critical patent/EP0169155A1/de
Withdrawn legal-status Critical Current

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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10D—STRINGED MUSICAL INSTRUMENTS; WIND MUSICAL INSTRUMENTS; ACCORDIONS OR CONCERTINAS; PERCUSSION MUSICAL INSTRUMENTS; AEOLIAN HARPS; SINGING-FLAME MUSICAL INSTRUMENTS; MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR
    • G10D3/00—Details of, or accessories for, stringed musical instruments, e.g. slide-bars
    • G10D3/02—Resonating means, horns or diaphragms
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10D—STRINGED MUSICAL INSTRUMENTS; WIND MUSICAL INSTRUMENTS; ACCORDIONS OR CONCERTINAS; PERCUSSION MUSICAL INSTRUMENTS; AEOLIAN HARPS; SINGING-FLAME MUSICAL INSTRUMENTS; MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR
    • G10D3/00—Details of, or accessories for, stringed musical instruments, e.g. slide-bars
    • G10D3/22—Material for manufacturing stringed musical instruments; Treatment of the material

Definitions

  • the present invention relates to a soundboard dam or bottom of the sounding board of a guitar or similar instrument and a method of bonding this dam on said table or said bottom.
  • the technical sector of the invention is that of violin making and more particularly that of plucked string instruments, in particular guitars.
  • a guitar is made up of a sound box comprising a soundboard and a fretboard above which strings are stretched fixed or applied on an bridge, generally six in number.
  • the box is closed on the side by fishplates and at its lower part by a bottom which is generally slightly curved.
  • the luthiers are required to make a barrage on the soundboard and in the background, that is to say an arrangement of bars and barrettes traditionally made of wood, glued to the inside of the table and the bottom and which have various functions depending on whether it is the table or the bottom.
  • the function of the soundboard barrage is to distribute the vibrations of the strings communicated to the table via the bridge for the resonance of the body.
  • the sound produced escapes through one or more openings called rosettes or openings.
  • the rosette has a round or oval opening that sits in the narrowed part of the table.
  • the louvers are generally f-shaped and are generally reserved in the enlarged part of the table opposite the handle.
  • the rosette can be practiced in the splint and on the side which appears towards the face of the performer.
  • the bottom dam is traditionally composed of several transverse bars which extend between the fishplates and the ends of which are embedded in counter-fishplates.
  • the present invention aims to provide a new solution to the dam of the soundboard or the bottom of the sound boxes of guitars or other similar instruments in order to simplify manufacturing while producing excellent quality instruments both from the point of view of mechanical strength and that of sound.
  • An objective of the invention is to propose a soundboard or bottom dam made of molded plastic material in order to facilitate the implementation of the table or the bottom and to lower the cost price without harming the quality. .
  • Another objective is to make a bottom of the body so that it can resonate under the effect of the vibrations of the strings.
  • the barrier according to the invention for the soundboard or the bottom of a guitar case or similar instrument, which barrier comprises transverse bars and / or longitudinal bars arranged in a fan, characterized in that said dam is made of molded plastic material of which said transverse bars and / or said longitudinal bars are interconnected by bridges of material, so as to constitute a unitary dam ready to be fixed to said soundboard and / or audit background.
  • the barrier comprises several bars extending in the longitudinal direction of the table and / or the bottom, which bars diverge from the side of the rocker cleat and are joined together by bridges of transverse material forming at least one transverse bar.
  • Said barrier also comprises groups of bars extending in the transverse direction of the soundboard and / or at the bottom, the bars of each of said groups converging on a point located on the external side of each of the longitudinal side bars and in alignment with said transverse bar formed by the material bridges.
  • said barrage comprises longitudinal bars extending from the rosette to the bottom of the table where the sill strip is located, which longitudinal bars are arranged in a fan, being distributed over the length of the bridge and on the other hand the groups of transverse bars extend from the ends of the bridge to the lateral edges of the part enlarged table.
  • the rosette is framed by two transverse bars joining the lateral edges of the table and according to the invention, said bars are made of molded plastic and are connected to each other by at least two bridges of material arranged on either side of the rosette and extending perpendicular to said transverse bars and parallel to the longitudinal axis of the table.
  • At least one of the longitudinal bars which make up the set of bars arranged in a fan shape is connected to one of said transverse bars which frame the rosette.
  • the longitudinal bars extend from the part of the table and / or the bottom where the heel of the handle is to the bottom of the table and / or the bottom where the sill cleat and the longitudinal bars are arranged in a fan, being distributed over the length of the bridge.
  • groups of transverse bars extend from the ends of the easel to the lateral edges of the widened part of the table.
  • the soundboard and / or the bottom also have groups of transverse bars which converge on a point located on the external side of the lateral longitudinal bars and in the part of the table between the place where the heel of the neck is and the narrowed part of the table and in alignment with a transverse bar formed by bridges of material.
  • Each group of transverse bars is made up of two divergent bars which form between them and the longitudinal side bars 60 ° angles.
  • Each of the transverse bars, longitudinal bars and groups of concurrent bars has pins extending from the upper edge of said bars and bars, which pins are distributed over all or part of the length of the bars and / or bars, which pins have their free end situated in a plane parallel to the surface or to the plane on which the base of the bars rests and constitute as many wedges for bonding the dam on the soundboard and / or the bottom.
  • said pins appear under the shape of small cylinders and have, at their base, a peripheral groove to create a zone of least resistance to break the lugs for their removal.
  • said plates which contribute to exerting pressure on the dam for its bonding are flat plates and for the manufacture of bottoms said plates are curved plates having the same curvature as said bottoms.
  • the result of the invention is the barrage of the soundboard and / or the bottom of a guitar resonance box which, made of plastic, allows the simplification of operations during the manufacture of such tables or backgrounds and lowering the cost price of the instruments without damaging the soundness.
  • the dam made of plastic molded from a material having qualities similar to those of wood, has the advantage of allowing the implementation of instruments producing a sound quality identical to that of traditional instruments.
  • FIG. 1 of the drawing represents the soundboard 1 of a traditional guitar, the visible face of which is the lower face intended to be placed inside the sound box.
  • a table has an enlarged part 1a, which is located on the side of the location of the rocker cleat 2 and a narrowed part Ib, located between the part 1a and part 1c located on the side of the heel location 3 the neck of the guitar.
  • the table has a circular opening Id called a rosette, which is traditionally and generally framed by two reinforcing bars parallel to each other extending transversely to the table, which bars are perpendicular to the median longitudinal axis XX which is also the axis of symmetry of the soundboard.
  • the table barrier is made up of several longitudinal bars, for example five in number, arranged in a fan shape and which diverge from the rosette Id at the lower edge of the table where the sill cleat is located. 2.
  • the plastic molded dam according to the invention and in one embodiment consists of several longitudinal bars 4/5/6/7/8 arranged in a fan, which bars are connected together by bridges of material of lesser height 9/10/11/12, aligned and forming a transverse bar.
  • the median longitudinal bar 6 is located on the axis XX and the transverse bar formed by the bridges 9/10/11/12 is perpendicular to the bar 6 therefore to the axis XX 1 .
  • This transverse bar 9/10/11/12 is positioned so that when the dam is placed on the table, it is located substantially on the median longitudinal axis of the easel 13 shown in dotted lines in the drawing, which is in known manner transverse to the table and perpendicular to said axis XX.
  • the lateral longitudinal bars 4/8 are integral with a transverse bar 14 located on one side of the rose 1d.
  • a second transverse bar 15 is located on the opposite side of the rosette which comprises the bar 14.
  • the two bars 14/15 are mutually parallel and perpendicular to the axis XX 1 and extend over the narrowed part of the table. They are connected to each other by bridges of material 16/17, which are parallel to each other and to the axis XX and, in combination with the bars 14/15, frame the rose Id. material bridges 16/17 are located substantially at the junction points of the lateral bars 4/8 and the transverse bar 14.
  • This barrier also comprises two groups of transverse bars 18 / 19-20 / 21 ⁇ which converge two by two on points 22/23 located on the side of the lateral longitudinal bars 4/8 and in alignment with the transverse bar formed material bridges 9/10/11/12.
  • the bars 18/19 converge on point 22 and extend in the part of the table between the lateral bar 8 and the edge of the widened part of the table.
  • the bars 18/19 are arranged at an angle a of 60 ° from each other and relative to the side bar 8.
  • the bars 20/21 are arranged in the same way with respect to the side bar 4 and converge on point 23.
  • FIG. 2 illustrates a soundboard or a bottom 24 of a contour similar to that of the table 1 previously described and comprising an enlarged part 24a situated on the side of the rocker cleat 25, a less important part 24b , located on the side of the heel 26 of the handle and of a narrowed portion 24c.
  • Said table 24 includes a barrier similar to that which has just been described with reference to FIG. 1 and for the fan-shaped part of the latter.
  • This barrier comprises longitudinal bars 27/28/29/30/31 which diverge from the heel 26 to the cleat 25, which longitudinal bars extend over the length of the table or the bottom.
  • the bar 29 extends on the axis of symmetry XX the other bars 27 / 28-30 / 31 diverge from the side of the sill strip symmetrically with respect to the bar 29.
  • the barrier comprises groups of bars 32 / 33-34 / 35 which converge in pairs on points 36/37 located on the side of the lateral longitudinal bars 27/31 and aligned on a transverse bar formed by bridges of material 38 / 39-40 / 41 which connect the longitudinal bars 27 to 31, said transverse bar being located in the case of a soundboard substantially on the median longitudinal axis of the easel 42.
  • the bars 32/33 converge on point 36, the bars 34/35 converge on point 37.
  • the bars are arranged at angular spacings in the same way as bars 18 / 19-20 / 21.
  • the dam illustrated in FIG. 2 may also include two other groups of transverse bars 43 / 44-45 / 46 which converge in pairs on points 47/48 located on the side of the lateral bars 27/31 and aligned on a transverse bar formed by bridges of material 49/50/51/52 which connect the longitudinal bars 27 to 31.
  • This transverse bar 49 to 52 and the bar 38 to 41 are mutually parallel and are perpendicular to the axis XX 1 .
  • the bars 32/33 and 34/35 extend in the widened part 24a of the table or the bottom: lateral bars 27/31 to the lateral edges of the table or the bottom.
  • Bars 43/44 converge on point 47; the bars 45/46 on the point 48 and extend in the less important part 24b: lateral bars 27/31 to the lateral edges of the table or the bottom.
  • the transverse bars 38 to 41 and 49 to 52 are, like the bars 9 to 12, 16 and 17 of lesser height than the concurrent transverse bars and the longitudinal bars arranged in a fan.
  • 14/15 crosspieces of the dam of Figure 1 are of a height of the order of ten millimeters
  • the longitudinal es t ret bar- 4-8 and 27 to 31 have a height of order of six to eight millimeters.
  • Said bars are of a trapezoidal cross section.
  • the transverse bars 14/15 and longitudinal 4 to 8 and 27 to 31 have their tapering ends leading to a practically zero height at the end.
  • the concurrent transverse bars 18 / 19-20 / 21-32 / 33-34 / 35-43 / 44-45 / 46 are also decreasing and are of a triangular profile so that their height is zero at their free end.
  • FIGS. 3 and 4 show a soundboard 1 or 24 in the bonding position of a molded dam according to FIGS. 1 and 2.
  • Table 1 or 24 is placed on a flat plate 53 perfectly erected.
  • a second flat plate 54 arranged parallel to the plate 53, some bars have a plurality of lugs 55, regularly distributed over the parts sloping bars and transverse bars and those of longitudinal bars.
  • the material bridges 9 to 12, 38 to 41 and 49 to 52 also include such lugs 55.
  • Said lugs 55 are for example small cylinders constituting shims whose height varies according to the height of the bars or the place where they are placed, so that their free upper part is in a plane parallel to the plane in which the bases of the bars are located.
  • the transverse bars 14/15 being of greater height than the others, have lugs 55 only on their sloping ends.
  • Said lugs 55 may have at their base a peripheral groove 55a forming a zone of least resistance to promote their removal by breaking them flush with the bars or bars after the dam has been glued to the soundboard or on the bottom.
  • the guitar bottoms being generally curved, the plates 53/54 entering the device for implementing the bottom dam, are preferably of a convex / concave shape with the same curvature as the bottom.
  • This bonding process is particularly interesting for the implementation of the dam of a series of soundboards or backgrounds by means of sets of molded bars.
  • these plates can be concave on one side and flat on the other and in this embodiment, the height of the pins will be adapted accordingly.
  • the dams, objects of the invention are obtained from known methods such as for example by molding a thermoplastic material or by rotational molding ...
  • the material used is a thermoplastic or a synthetic resin with one or more components or lightened or expanded plastics, for example such dams are made of polystyrene.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Manufacturing & Machinery (AREA)
  • Stringed Musical Instruments (AREA)
EP85430013A 1984-04-20 1985-04-22 Verstärkungsrippeneinheit zur Befestigung an der Decke und/oder dem Boden eines Klangkörpers Withdrawn EP0169155A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8406452A FR2563362B1 (fr) 1984-04-20 1984-04-20 Barrage de la table d'harmonie ou du fond d'une caisse de resonance d'une guitare ou instrument similaire; procede de fabrication d'une telle table et d'un tel fond pour la mise en place dudit barrage et dispositif pour la mise en oeuvre de ce procede
FR8406452 1984-04-20

Publications (1)

Publication Number Publication Date
EP0169155A1 true EP0169155A1 (de) 1986-01-22

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ID=9303445

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85430013A Withdrawn EP0169155A1 (de) 1984-04-20 1985-04-22 Verstärkungsrippeneinheit zur Befestigung an der Decke und/oder dem Boden eines Klangkörpers

Country Status (2)

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EP (1) EP0169155A1 (de)
FR (1) FR2563362B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994016430A1 (en) * 1993-01-18 1994-07-21 Kari Nieminen Bracing structure for stringed musical instrument, especially for guitar
WO2001056011A1 (en) * 2000-01-28 2001-08-02 Griffiths Guitar International Ltd. Acoustic frames for stringed musical instruments and method of making them
EP1156475A1 (de) * 2000-05-19 2001-11-21 Kaman Music Corporation Oberes Element für ein Saitenmusikinstrument

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR653516A (fr) * 1928-04-27 1929-03-22 Barre d'harmonie
US2489169A (en) * 1946-06-28 1949-11-22 Virzi Giuseppe Acoustic skeleton chamber for string instruments
DE3221219A1 (de) * 1981-07-20 1983-02-03 Kaman, Charles H., Farmington, Conn. Klangkoerperdecke eines saiteninstrumentes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR653516A (fr) * 1928-04-27 1929-03-22 Barre d'harmonie
US2489169A (en) * 1946-06-28 1949-11-22 Virzi Giuseppe Acoustic skeleton chamber for string instruments
DE3221219A1 (de) * 1981-07-20 1983-02-03 Kaman, Charles H., Farmington, Conn. Klangkoerperdecke eines saiteninstrumentes

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994016430A1 (en) * 1993-01-18 1994-07-21 Kari Nieminen Bracing structure for stringed musical instrument, especially for guitar
WO2001056011A1 (en) * 2000-01-28 2001-08-02 Griffiths Guitar International Ltd. Acoustic frames for stringed musical instruments and method of making them
US6333454B1 (en) 2000-01-28 2001-12-25 Griffiths Guitar International Ltd. Acoustic support structure for stringed musical instruments and method of making same
EP1156475A1 (de) * 2000-05-19 2001-11-21 Kaman Music Corporation Oberes Element für ein Saitenmusikinstrument

Also Published As

Publication number Publication date
FR2563362B1 (fr) 1986-07-25
FR2563362A1 (fr) 1985-10-25

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