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WO1992004711A1 - Methode et dispositif permettant d'ameliorer le son de guitares et d'instruments a cordes de configuration similaire - Google Patents

Methode et dispositif permettant d'ameliorer le son de guitares et d'instruments a cordes de configuration similaire Download PDF

Info

Publication number
WO1992004711A1
WO1992004711A1 PCT/US1990/005056 US9005056W WO9204711A1 WO 1992004711 A1 WO1992004711 A1 WO 1992004711A1 US 9005056 W US9005056 W US 9005056W WO 9204711 A1 WO9204711 A1 WO 9204711A1
Authority
WO
WIPO (PCT)
Prior art keywords
sound
tone
boards
box
instrument
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.)
Ceased
Application number
PCT/US1990/005056
Other languages
English (en)
Inventor
Shin Hsing Chen
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
Priority to US07/910,104 priority Critical patent/US5542329A/en
Priority to PCT/US1990/005056 priority patent/WO1992004711A1/fr
Publication of WO1992004711A1 publication Critical patent/WO1992004711A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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

Definitions

  • This invention relates to improvement of sound in stringed instruments such as guitars and similar instruments which have hollow bodied resonating means and is more particularly
  • the sound box comprises a sidewall structure and a set of at least mildly arched sound boards that vibrate and stir the surrounding air to create and propel sound waves through a hole or "F " holes in top board of the instrument.
  • the one-piece straddle bridge design has merit in causing the central area of the back plate to vibrate in synchronous phase with the same area of the top but, due to the non-articulated or nonlateral driving nature of the bridge member, it leaves the remaining large area of the sound box panels to lag behind phasewise, preventing a full potential in clarity of sound production from being realized.
  • said permanently engaged assembly lacking in tone selection control, provides only a limited tonal range to no wider than that of the traditional design and its lack of treble enhancing means further prevents production of brilliant sounds.
  • the invention as claimed is to remedy these shortcomings. It solves the problems in designing acoustic stringed instruments with improved clarity in tone that can only be achieved by generating synchronously phased vibratory movements over the sound box panels with practically no time lapes in said movements.
  • the improvement allows productions of quick responding, non- dragging and non-overlapping notes (when so desired) from the instruments and it is achieved by providing within the sound box an articulated straddle bridge which mainly functions as a laterally directed drive means that energizes and drives the peripheral areas of the back plate sideways, that is, it stretches the plate toward both sides during the energizing phase of a vibratory cycle.
  • the energized drive simultaneously causes the entire sound box to flatten or the mildly arched both sound boards to flap in unison, bypassing the ripple factor, thereby phase distinct vibratory movement of the sound box realized.
  • the invention also extends the tonal range to beyond the limit of that of conventional acoustic stringed instruments through enhancing treble tone in general and by incorporating tone selector means that allows musicians to instantly disengage, engage, or manipulate the tensions of the new acoustic driver assembly for selecting dark, medium, or brighter tone colors respectively by a flip of the manual switch means from outside of the instrument.
  • a rolyphcnic instrument such as a guitar to have capabilities such as disclosed above, to sound clearly and respond quickly notewise when the instrument is played, especially where the music involves complex, dissonance inclined contrapuntal compositions.
  • Figure 1 is a schematic elevational detail view looking upwardly through the body of the guitar of Figure 2 showing therein the new sound improvement-selection mechanism of the present invention.
  • Figure 2 is a perspective view of the body of the guitar representing a stringed instrument providing reference for
  • Figure 3 is a fragmental sectional elevational view of the sound improvement-selection mechanism.
  • Figure 4 is a fragmental vertical detail view taken along the sectional line IV-IV in Figure 3.
  • FIG. 5 is an enlarged detail view of the tone selection assembly showing disengaged mode (a), engaged mode (b), and tensioned mod (c).
  • stringed instruments comprising a body or sound box 15 including top board back plate 13, a sidewall structure 14 joini ng said boards and defining a chamber 15 into which a sound hole 17 through the sound board 12 opens under playing strings 15
  • the assembled device 10 and 21 comprires an energy diverting lateral drive mechanism 19 and 20 within the sound box chamber 15 and is switchably connected to the treble stringo 18" area of anchoring member 59 via a tone selection switch assembly 21, including a treble tone enhancing pin screw 47 .
  • the back plate 13 provides anchor bearings for drive mechanism 19 and 20 by means of drive tips 23 and drive notches 24 combination anchored by quick mount spring fasteners 27.
  • the drive arms 19 and 20 are cooperatively disposed in a upwardly convergent relation, with lower end respective rocker tips 23 received in complementary notches 24 in an existing bracing bar 25, or in equivalently patched wood segments where such bracing is absent or dislocated, rockably fastened by spring fasteners 27.
  • the bracing 25 is generally glued onto the inner back panel in parallel with and beneath the off-upper edge of member 5r above.
  • the arms 19 and 20 are connected in an articulated manner, wherein the arm 19 has a downward facing inverted V notched bearing 29 which receives complementary tip 28 of drive arm 20, together forming an expanded wishbone configuration.
  • Resillient spring clamps 30 and 27 fasten respective rocker couplings for buzz free movement. Said articulated coupling of the upper arm parts 23 and 29 forms a lateral distance expandable driving between bearing notches 24's.
  • an upwardly projecting needle pointed fulcrum spindle 32 which engages in a complementary fulcrum socket 33 in the lower side face of the lever 31 and fastened by a spring clamr 62 that loops through the eye 61, arround the fulorum coupling, and holds the lever 31 firmly but rockably in place.
  • One end of the lever 31 has a bifurcation 34 in which is
  • biasing means comprising a string member 33 engaged at one end with the lever 31 and at its opposite end with the post 35.
  • the post 35 is rigidly supported by means of the bar 25 into which a lower threaded terminal 39 of the post is secured and rigidly locked by mears of a lock nut 40. From the bar 25, the post 35 extents upwardly through a clearance hole 41 in the arm 19. It its energy receiving end 31' of the lever 31 there is transversely welded coupling rod 3A for the paired spiral cam fingers 52 of the switching mechanism 21. Said rod 53 is positioned so that each segment is within the orbit of the tip of the parallel pair cam fingers 52.
  • These fingers have graduated radii for varying the distance and the tension of the grip of the rod 53 to engage assembly 21 with assembly 10 when said fingers 52 are turned and said radii reduced. Further turning of said fingers 52 causes said energy lever tip 31' to be pulled to slide lower in the direction of journal bearing 51 and exerts varying degree of tensions to said boards 12 and 13 via post member 35, and post stem 42 of switching assembly 21.
  • Said assembly 21 includes a vibratory force exerting cradle bar 45 which is fixedly secured to the underside of the board 12 and generally in line with the treble strings 18' as by means of a metal treble tone enhancing pin screw 47 with its pin head in contact with the treble section of saddle 66.
  • Said pin screw 47 functions to directly channel vibratory energy tc the board 12, or both boards 12 and 13 and prevents treble energy from being absolved by the wooden material of member 59.
  • Center biased spring retainers 45 retain an inverted L sliding beam 43-post stem 42 vibratory force exerting extension for said cradle bar 45 with its half round beam segment 43 coupled firmly within the channel 44 of cradle bar 45 forming the core of said tone selection means 21 by affording said stem 42 to move and engage with lever tip 31' to effect driving of assembly 10.
  • Said post stem 42 is in immediate proximity to the lever contact edge 31' mounted on the free standing driver, assembly 10 and, at its stem terminal 42', a transverse bearing 51 is provided to carry a switching journal 50 which, in turn, carries said cam fingers 52 in an engageable relationship with said couplirg rod 53.
  • a light weight switch body extension 49 is provided, allowing an ever-accessible helix grip sections 58 exposed to the sound hole opening, and the extension end 55 is securedly born by upper bracing 57.
  • a switch rod such as 49 may be alternatively designed to pass through the end pin of an instrument for similar tone selection rurpose. Hardwood, light weight metal, or a combination of both may be used for the parts of said device.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Stringed Musical Instruments (AREA)

Abstract

Dispositif de sollicitation latérale articulée en forme d'élément triangulaire (19, 20) monté sur la face intérieure du dos (13) d'un instrument à cordes pour stimuler et solliciter le dos (13) latéralement afin que les panneaux de la caisse de résonnance (15) génèrent des vibrations de phases distinctes résultant d'un mouvement d'oscillations se produisant à l'unisson sur la table d'harmonie (12, 13) dans le but d'améliorer la définition et la réponse de tonalité. Afin de combiner le son amélioré avec le son original de l'instrument et d'accroître ainsi la gamme de tonalités, une possibilité de commutation manuelle (21) est insérée dans la caisse de résonnance (15) pour pouvoir sélectionner le timbre de l'extérieur de l'instrument. En outre, un dispositif d'amplification des aigus (45, 47) permet de rendre plus clair le son des instruments en général, et de faire ressortir les aigus en particulier, de sorte que le timbre est amélioré au-delà de celui qui peut être produit par des instruments traditionnels.
PCT/US1990/005056 1990-09-06 1990-09-06 Methode et dispositif permettant d'ameliorer le son de guitares et d'instruments a cordes de configuration similaire Ceased WO1992004711A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US07/910,104 US5542329A (en) 1990-09-06 1990-09-06 Device for improving sound in guitars and similar stringed instruments
PCT/US1990/005056 WO1992004711A1 (fr) 1990-09-06 1990-09-06 Methode et dispositif permettant d'ameliorer le son de guitares et d'instruments a cordes de configuration similaire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1990/005056 WO1992004711A1 (fr) 1990-09-06 1990-09-06 Methode et dispositif permettant d'ameliorer le son de guitares et d'instruments a cordes de configuration similaire

Publications (1)

Publication Number Publication Date
WO1992004711A1 true WO1992004711A1 (fr) 1992-03-19

Family

ID=22221029

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1990/005056 Ceased WO1992004711A1 (fr) 1990-09-06 1990-09-06 Methode et dispositif permettant d'ameliorer le son de guitares et d'instruments a cordes de configuration similaire

Country Status (1)

Country Link
WO (1) WO1992004711A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US406750A (en) * 1889-07-09 Violin
US676470A (en) * 1900-08-06 1901-06-18 Paul Henning Guitar.
US1275351A (en) * 1917-08-22 1918-08-13 Robert L Yeakey Violin.
US3974730A (en) * 1975-08-08 1976-08-17 Adams Jr Andrew Borden Guitar strut assembly
US4026181A (en) * 1975-07-07 1977-05-31 Barcus Lester M Tension rod
US4843940A (en) * 1987-12-24 1989-07-04 Chen Shin H Tone amplification in stringed instruments

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US406750A (en) * 1889-07-09 Violin
US676470A (en) * 1900-08-06 1901-06-18 Paul Henning Guitar.
US1275351A (en) * 1917-08-22 1918-08-13 Robert L Yeakey Violin.
US4026181A (en) * 1975-07-07 1977-05-31 Barcus Lester M Tension rod
US3974730A (en) * 1975-08-08 1976-08-17 Adams Jr Andrew Borden Guitar strut assembly
US4843940A (en) * 1987-12-24 1989-07-04 Chen Shin H Tone amplification in stringed instruments

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