US3674908A - Piano sounding board assembly - Google Patents

Piano sounding board assembly Download PDF

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Publication number
US3674908A
US3674908A US137465A US3674908DA US3674908A US 3674908 A US3674908 A US 3674908A US 137465 A US137465 A US 137465A US 3674908D A US3674908D A US 3674908DA US 3674908 A US3674908 A US 3674908A
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US
United States
Prior art keywords
sounding board
bass
connecting plate
bridge
plate member
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.)
Expired - Lifetime
Application number
US137465A
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English (en)
Inventor
Ingo Ludemann
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.)
Nippon Gakki Co Ltd
Original Assignee
Nippon Gakki Co Ltd
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 Nippon Gakki Co Ltd filed Critical Nippon Gakki Co Ltd
Application granted granted Critical
Publication of US3674908A publication Critical patent/US3674908A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10C—PIANOS, HARPSICHORDS, SPINETS OR SIMILAR STRINGED MUSICAL INSTRUMENTS WITH ONE OR MORE KEYBOARDS
    • G10C3/00—Details or accessories
    • G10C3/06—Resonating means, e.g. soundboards or resonant strings; Fastenings thereof

Definitions

  • a sounding board for pianos is provided on one face thereof with a lengthy treble bridge and a relatively short bass bridge. It has been the conventional practice to glue the bass bridge to the sounding board separately from the treble bridge in such a manner that the bass bridge also glued to the sounding board is disposed by the side of the treble bridge along the length thereof and in spaced relationship therewith.
  • Such sounding board construction results in undue increase in rigidity in those portions of the sounding board to which the bass and treble bridges are glued and has a drawback that the treble bridge tends to block even distribution or transmission to the sounding board of the vibration from the bass bridge. It will thus be understood that with the sounding board construction mentioned above a difircultyis encountered in obtaining bass tones which are satisfactory in volume and in lower harmonies or overtones.
  • More recent prior art proposes to connect one of the ends of the treble and bass bridges with the use of a rod member secured to the back side of the sounding board, thereby to permit the vibration from the bass bridge to be distributed to the open area of the sounding board through the connecting rod member and the treble bridge.
  • This sounding board construction might succeed in overcoming the above noted difficulty to some extent; however, it is not satisfactory in that the vibration from the bass bridge cannot be effectively propelled through the treble bridge which is connected to the bass bridge simply at one end thereof and, to a further disadvantage, connected indirectly by means of a connecting rod member which is mounted on the back side of the sounding board.
  • the connection between the treble and bass bridges is made to propel the vibration from the bass bridge out into the open area of the sounding board through the treble bridge. This, of course, effects an improvement in the bass tones of the sounding board, and therefore of the piano and results in efficient bass tone distribution.
  • a piano sounding board assembly comprising a sounding board, an elongated treble bridge member glued to one face of the sounding board and extending substantially diagonally of the sounding board, a bass bridge member disposed in spaced relationship with said treble bridge member, a connecting plate member directly interconnecting the treble and bass bridges, and a supporting member secured to the face of the sounding board and supporting the connecting plate member.
  • the principal feature of the invention resides in the provision of the connecting plate member establishing an ample connection between the bass and treble bridges.
  • the plate member has a substantial area and therefore serves to efficiently transmit the vibration from the bass bridge to the sounding board and at the same time act as an auxiliary sounding board which plays a role to improve tone qualities in the bass range through increase in lower hannonics or overtones.
  • FIG. I is a diagrammatic plan view of a piano sounding board assembly embodying the instant invention.
  • FIG. 2 is a fragmentary cross-sectional view on an enlarged scale and taken along the section line II II of FIG. 1 (ribs omitted).
  • the sounding board assembly of the invention is designated by the reference numeral 1 and shown as being employed in a grand concert piano.
  • Indicated at 2 are a series of sounding board reinforcing rib members which are secured to the back side or face of the sounding board and are arranged in side by side relationship with each other.
  • a long treble bridge, on which treble and intermediate piano strings are stretched, is glued to the top face of the sounding board 1.
  • the treble bridge 3 is disposed substantially diagonally of the sounding board 1 and has end portions secured to one longitudinal edge of a connecting plate member 5.
  • This connecting plate member 5 has a generally rectangular shape and extends in parallelly spaced relationship with the top face of the sounding board 1.
  • the connecting plate member 5 On the other longitudinal edge of the connecting plate member 5, there is supported a relatively short bass bridge 4 on which bass piano strings are stretched.
  • the bass bridge 4 is in overlapping relationship with the connecting plate member 5 over the entire length thereof.
  • the bass bridge 4 is thus spaced apart from the sounding board 1.
  • the connecting plate member 5 is securely anchored in the treble bridge 3 in such a manner that the longitudinal edge of the connecting member 5 is fitted into an elongated groove formed in the side wall of the bridge 3 facing the bass bridge member 4.
  • the connecting plate member 5 is glued to and supported on an elongated rod member 6 which is secured by gluing to the top face of the sounding board 1 and extended intermediate between the two longitudinal edges of the connecting plate member 5.
  • the supporting rod member 6 is disposed in a position between the bass and treble bridges.
  • the bass bridge 4 is connected over the entire length thereof to the longer treble bridge 3 by means of the connecting plate member 5 so that the vibration from the bass bridge 4 may be effectively transmitted and distributed to the sounding board through the connecting plate member 5 and treble bridge 3.
  • vibrational area of the bass tones may be increased and it will be made possible to obtain improved tonal qualities in the bass range and rich in lower harmonics or overtones.
  • the connecting plate member has a substantial area which serves to act as an auxiliary sounding board and, therefore, contributes to enhancing the tonal qualities in the bass range as well as amplifying overall tones of the piano.
  • a piano sounding board assembly comprising a sounding board, an elongated treble bridge member secured to one face of said sounding board and extending substantially diagonally of said sounding board, a bass bridge member disposed in spaced relationship with said treble bridge member, a connecting plate member directly connecting said bass and treble bridge members, supporting means secured to the face of said sounding board and supporting said connecting plate member.
  • a piano sounding board assembly as defined in claim I wherein said connecting plate member is spaced apart from said sounding board by said supporting means, and said has bridge member is secured on top of said connecting plate member spacedly from said sounding board.
  • connecting plate member presents a substantially rectangular shape and has its one longitudinal edge securely anchored in said treble bridge member, and said has bridge member is securely supported over the entire length thereof on the other longitudinal edge of said connecting plate member.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Stringed Musical Instruments (AREA)
  • Electrophonic Musical Instruments (AREA)
US137465A 1970-08-28 1971-04-26 Piano sounding board assembly Expired - Lifetime US3674908A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP45074936A JPS4946412B1 (enrdf_load_stackoverflow) 1970-08-28 1970-08-28

Publications (1)

Publication Number Publication Date
US3674908A true US3674908A (en) 1972-07-04

Family

ID=13561722

Family Applications (1)

Application Number Title Priority Date Filing Date
US137465A Expired - Lifetime US3674908A (en) 1970-08-28 1971-04-26 Piano sounding board assembly

Country Status (3)

Country Link
US (1) US3674908A (enrdf_load_stackoverflow)
JP (1) JPS4946412B1 (enrdf_load_stackoverflow)
DE (1) DE2140224C3 (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60117385U (ja) * 1984-01-17 1985-08-08 株式会社　カナモト フオ−ルドクレ−ン
JPS60170391U (ja) * 1984-04-19 1985-11-12 株式会社　三栄組 大重量物用橋形クレ−ン
JPS62200699U (enrdf_load_stackoverflow) * 1986-06-12 1987-12-21
CZ304837B6 (cs) * 2013-09-25 2014-11-26 Petrof, Spol. S R. O. Rezonanční deska piana nebo pianina

Also Published As

Publication number Publication date
DE2140224A1 (de) 1972-03-02
DE2140224C3 (de) 1975-03-27
JPS4946412B1 (enrdf_load_stackoverflow) 1974-12-10
DE2140224B2 (de) 1974-08-08

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