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WO1987003125A1 - Mecanique de piano droit - Google Patents

Mecanique de piano droit Download PDF

Info

Publication number
WO1987003125A1
WO1987003125A1 PCT/GB1986/000672 GB8600672W WO8703125A1 WO 1987003125 A1 WO1987003125 A1 WO 1987003125A1 GB 8600672 W GB8600672 W GB 8600672W WO 8703125 A1 WO8703125 A1 WO 8703125A1
Authority
WO
WIPO (PCT)
Prior art keywords
jack
butt
key
hammer assembly
attack surface
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/GB1986/000672
Other languages
English (en)
Inventor
Dietrich Heinrich Dotzek
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.)
HERRBURGER BROOKS PLC
Original Assignee
HERRBURGER BROOKS PLC
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 HERRBURGER BROOKS PLC filed Critical HERRBURGER BROOKS PLC
Publication of WO1987003125A1 publication Critical patent/WO1987003125A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • G10C3/16—Actions
    • G10C3/24—Repetition [tremolo] mechanisms

Definitions

  • This invention relates to upright piano actions.
  • An ⁇ upright action includes a hammer assembly with a butt having a jack attack surface acted on by a pivotable jack pivotally carried by a whippen lever which is pivotable by a piano key and which also carries a check head for retaining the hammer assembly in a checked £ position after a note has been struck and while the key remains fully depressed.
  • the release of the key first allows the hammer assembly to return to a rest position and it is only after this that further raising of the key to its rest position allows the jack to return to below the jack attack surface of the butt.
  • the present invention provides means for influencing the movement of the jack, the said means being carried by i- ⁇ the hammer assembly.
  • the invention provides an upright piano action in which the hammer assembly is provided with means for urging the jack towards the jack attack surface of the butt when the head assembly moves from o its checked position towards its rest position.
  • the urging means is preferably provided on the butt, for reasons of space saving and economy of materials. It _> " preferably comprises a resilient member which projects from the butt and is in contact with the jack at all times. Preferably, also, it retains the jack in contact with the butt after the jack has escaped from the jack attack surface.
  • let-off i.e. the jack nose 8 stops against the let-off button 14 and the jack 7 is pivoted away from below the jack attack surface 9, thereby allowing the hammer assembly to bounce back.
  • the balance hammer 11 of the hammer assembly is i ⁇ thereupon caught by the check head 6 of the whippen assembly so that the hammer assembly is retained in the checked position (broken line) so long as the key 3 remains fully depressed.
  • a stiff resilient bent wire or push hook 20 is securely 2o fitted into and projects from the butt 10.
  • the push hook 20 moves with the hammer assembly and acts as a jack stop. After the jack 7 has escaped from the jack attack surface 9 it is retained in contact with the butt 10 (and therefore as close as possible to the surface 9) Z- ⁇ by the push hook 20. As soon as the front of the key 3 is allowed to rise, the whippen lever 5 begins to fall and the check head 6 therefore releases the balance hammer 11, with the result that the hammer assembly starts to fall.
  • the push hook 20 on the butt 10 urges the jack 7 towards the jack attack surface 9 so that, as soon as the lever 5 is sufficiently far below the let-off button 14, the jack 7 is pushed back into its firing position below the attack surface 9.
  • the jack 7 In the absence of the push hook 20, in slow motion, the jack 7 would just follow the downward movement of the whippen assembly and hammer assembly and would come into and remain in contact with the butt 10 above the attack surface 9 until the hammer shank 13 reached its rest i* position against the cloth 15 of the hammer rail 2. Only then would the continued downward movement of the whippen assembly (as the key 3 approaches the key rest 17) allow the jack 7 to slide back into a new striking position below the attack surface 9.
  • the jack 7 can be made ready for a new stroke after the key 3 has risen only about half-way.

Landscapes

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

Abstract

Une mécanique de piano droit comprend un mécanisme de frappe ayant un aboutement (10) pourvu d'une surface d'attaque (9) actionnée par un grand levier pivotable d'échappement (7) porté de manière pivotable par un chevalet (5) qui peut pivoter grâce à une touche (3) du piano et qui porte un attrape-marteau (6) pour retenir les marteaux en une position d'arrêt une fois qu'une note à été frappée et pendant que la touche (3) reste complètement abaissée. Afin de ramener le grand levier (7) à sa position d'attaque au-dessous de la surface d'attaque (9) bien avant que la touche (3) ne revienne à sa position de repos, un élément porté par le mécanisme de frappe, de préférence par l'aboutement (10), influence le mouvement du grand levier (7). En particulier, un organe élastique (20) force le grand levier (7) contre la surface d'attaque (9) lorsque les matériaux se déplacent de leur position d'arrêt vers leur position de repos.
PCT/GB1986/000672 1985-11-19 1986-10-30 Mecanique de piano droit Ceased WO1987003125A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB858528451A GB8528451D0 (en) 1985-11-19 1985-11-19 Upright piano action
GB8528451 1985-11-19

Publications (1)

Publication Number Publication Date
WO1987003125A1 true WO1987003125A1 (fr) 1987-05-21

Family

ID=10588430

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1986/000672 Ceased WO1987003125A1 (fr) 1985-11-19 1986-10-30 Mecanique de piano droit

Country Status (2)

Country Link
GB (1) GB8528451D0 (fr)
WO (1) WO1987003125A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995023403A1 (fr) * 1994-02-26 1995-08-31 Ed. Seiler, Pianofortefabrik Gmbh & Co. Kg Mecanique de piano

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE205183C (fr) *
DE24991C (de) * H. F. FLEMMING in Leutsch bei Leipzig Neuerung an Pianino-Mechaniken
DE40564C (de) * A. REISE in Berlin, Waldemarstr. 13 Pianino - Mechanik
DE347305C (de) * 1920-10-17 1922-01-19 Baldur Pianoforte Fabrik Akt G Klavier mit Repetitionsmechanik

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE205183C (fr) *
DE24991C (de) * H. F. FLEMMING in Leutsch bei Leipzig Neuerung an Pianino-Mechaniken
DE40564C (de) * A. REISE in Berlin, Waldemarstr. 13 Pianino - Mechanik
DE347305C (de) * 1920-10-17 1922-01-19 Baldur Pianoforte Fabrik Akt G Klavier mit Repetitionsmechanik

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995023403A1 (fr) * 1994-02-26 1995-08-31 Ed. Seiler, Pianofortefabrik Gmbh & Co. Kg Mecanique de piano

Also Published As

Publication number Publication date
GB8528451D0 (en) 1985-12-24

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