EP0284558B1 - Dispositif d'échappement pour piano droit - Google Patents

Dispositif d'échappement pour piano droit Download PDF

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Publication number
EP0284558B1
EP0284558B1 EP88810150A EP88810150A EP0284558B1 EP 0284558 B1 EP0284558 B1 EP 0284558B1 EP 88810150 A EP88810150 A EP 88810150A EP 88810150 A EP88810150 A EP 88810150A EP 0284558 B1 EP0284558 B1 EP 0284558B1
Authority
EP
European Patent Office
Prior art keywords
hopper
button
repetition
lever
arrangement
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
EP88810150A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0284558A2 (fr
EP0284558A3 (en
Inventor
Fernand Kummer
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 AT88810150T priority Critical patent/ATE88826T1/de
Publication of EP0284558A2 publication Critical patent/EP0284558A2/fr
Publication of EP0284558A3 publication Critical patent/EP0284558A3/fr
Application granted granted Critical
Publication of EP0284558B1 publication Critical patent/EP0284558B1/fr
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
    • G10C3/16—Actions
    • G10C3/161—Actions specially adapted for upright pianos
    • 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

  • the upright piano has, compared to the grand piano, the disadvantage of not allowing, when the key is in the low position, after the hammer strikes the string, a new strike with a movement of small amplitude. This is particularly troublesome, for example, when it is necessary to perform trills, especially in "pianissimo".
  • the grand piano on the contrary allows such successions of strikes even when the key is in the low position, with movements of very low amplitude.
  • This advantage of the grand piano is due to its double escapement mechanism. Simpler, the mechanism of the upright piano has only one exhaust.
  • the present invention aims to provide an exhaust device for upright piano, which allows rapid successive strikes of the string with movements of very small amplitude, when the button is in the down position.
  • Figure 1 is a side view of a conventional upright piano mechanism, the key being in the high position, that is to say at rest.
  • Figure 2 is a view of the same mechanism, with the key in the down position, that is to say pressed, the hammer returning back after striking the rope.
  • Figure 3 is a side view of a device according to the invention, the key being in the high position.
  • Figure 4 is a side view of a device according to the invention, when the key is halfway through its return movement, after being pressed, and when the hammer returns back after striking the rope; the dotted lines represent the position essential parts when the key is still pressed, the hammer has already started its backward stroke and it is retained by the catch.
  • German patent Berdux DE-C-58 257 describes for example an exhaust device for upright piano comprising a lever b1 which extends the classic exhaust lever secured to the exhaust pusher b2.
  • the easel A is provided with a button a1 placed vertically under the end of the lever b1.
  • the escapement has worked, that is to say when the lever b2 has slipped on the side of the nut c1, the lever b1 meets the button a1 secured to the bridge A.
  • the rotation of the pusher b2 around from point 02 is interrupted.
  • the spring f pushes back the lever b1, and consequently the pusher b2.
  • the end of the latter having spread to a lesser extent than in the usual devices, it is replaced more quickly under the nut by the action of the spring f.
  • the Berdux device however has the drawback, which already exists in conventional devices, that the return of the pusher under the nut, which recharges the device, is only controlled by the spring f. In practice, the Berdux system has few advantages, precisely because of this insufficiency.
  • the present invention aims to provide a device which not only limits the rotation of the exhaust pusher by preventing it from climbing too high next to the nut during the upward stroke of the bridge, when the key is pressed, but also causes the reverse rotation of the exhaust valve, and its return under the nut, when the key is released and the bridge descends.
  • the device which is the subject of the invention comprises a refill button 14.
  • the exhaust lever 7 is extended by a reworking lever 15, the end of which is provided with a felt roller 16.
  • the length of the refill lever 15 is such that, at rest, the felt roller 16 comes into contact with the refill button 14.
  • This button is fixed to a bar 17, preferably in wood, by means of a threaded rod. This threaded rod makes it possible to adjust the height of the button so that contact with the felt roller 16 is made at the appropriate time.
  • the bridge 18 is pushed upwards, carrying with it the pusher 2 and the exhaust lever 7.
  • the charging lever 15, integral with the exhaust lever 7, rises at the same time and the caster 16 therefore detaches from the charging button 14 as soon as the key is pressed.
  • this recharging movement will take place the sooner the higher the position of the recharging button. It is easy to place this button at a height such that the device is again in a condition to restart the hammer towards the string already after a very short upward movement of the key. It is enough to slightly release the key, after being pressed, to be able to restart the hammer towards the string by pressing the key again.
  • the optimal setting of the device is that in which the wheel 16 abuts on the button 14 just when the catcher receives the counter-catcher.
  • the recharging lever 15 is a steel rod pressed into the exhaust lever 7, which is itself made of wood.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Amplifiers (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Liquid Crystal Substances (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Reciprocating Pumps (AREA)
  • Paper (AREA)
  • Stringed Musical Instruments (AREA)
EP88810150A 1987-03-18 1988-03-10 Dispositif d'échappement pour piano droit Expired - Lifetime EP0284558B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88810150T ATE88826T1 (de) 1987-03-18 1988-03-10 Ausloesungsmechanik fuer klaviere.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1019/87 1987-03-18
CH1019/87A CH670911A5 (enrdf_load_stackoverflow) 1987-03-18 1987-03-18

Publications (3)

Publication Number Publication Date
EP0284558A2 EP0284558A2 (fr) 1988-09-28
EP0284558A3 EP0284558A3 (en) 1989-07-12
EP0284558B1 true EP0284558B1 (fr) 1993-04-28

Family

ID=4200549

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88810150A Expired - Lifetime EP0284558B1 (fr) 1987-03-18 1988-03-10 Dispositif d'échappement pour piano droit

Country Status (5)

Country Link
US (1) US4840101A (enrdf_load_stackoverflow)
EP (1) EP0284558B1 (enrdf_load_stackoverflow)
AT (1) ATE88826T1 (enrdf_load_stackoverflow)
CH (1) CH670911A5 (enrdf_load_stackoverflow)
DE (2) DE3880537D1 (enrdf_load_stackoverflow)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3942456A1 (de) * 1989-12-22 1991-06-27 Steiner Ernst Tastengitarre
DE4414100A1 (de) * 1994-04-22 1995-10-26 Helmut Karl Übertragungsmechanismus für die Dämpfung von aufrechten Hammerinstrumenten II
US5763799A (en) * 1996-10-24 1998-06-09 Baldwin Piano & Organ Co., Inc. Simulated escapement apparatus for electronic keyboard
BR9901823A (pt) * 1999-04-14 2000-10-31 Djalma Pacheco De Jun Carvalho Dispositivo de dupla repetição nos pianos verticais e de acrécimo de resistência ao toque em teclados de pianos verticias
JP5445959B2 (ja) * 2010-03-25 2014-03-19 ヤマハ株式会社 アップライトピアノ型アクション
US8735699B2 (en) * 2012-01-19 2014-05-27 Kirk Burgett Main action rail for upright piano with front-accessible whippen flange screw
US8937235B2 (en) 2012-04-20 2015-01-20 Christopher Richard Rawson Professional upright piano action

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE89748C (enrdf_load_stackoverflow) *
DE58257C (de) * BERDUX in Heilbronn Repetitionsmechanik für Pianinos
GB190623539A (en) * 1906-10-23 1907-10-17 Jeffrey James Bruer Improvements in or in connection with Pianoforte Actions.
US1586547A (en) * 1919-11-19 1926-06-01 Eastwood Richard Key action of upright pianofortes
GB169021A (en) * 1920-06-22 1921-09-22 Richard Eastwood Improvements in repetition actions for pianos
US2835157A (en) * 1956-04-18 1958-05-20 Wilbur W Waters Upright piano action

Also Published As

Publication number Publication date
US4840101A (en) 1989-06-20
DE284558T1 (de) 1990-09-06
ATE88826T1 (de) 1993-05-15
EP0284558A2 (fr) 1988-09-28
DE3880537D1 (de) 1993-06-03
EP0284558A3 (en) 1989-07-12
CH670911A5 (enrdf_load_stackoverflow) 1989-07-14

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