EP0746842A1 - Mechanik für ein klavier - Google Patents
Mechanik für ein klavierInfo
- Publication number
- EP0746842A1 EP0746842A1 EP95911256A EP95911256A EP0746842A1 EP 0746842 A1 EP0746842 A1 EP 0746842A1 EP 95911256 A EP95911256 A EP 95911256A EP 95911256 A EP95911256 A EP 95911256A EP 0746842 A1 EP0746842 A1 EP 0746842A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hammer
- magnets
- piano
- axis
- mechanics
- 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.)
- Granted
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
- the invention relates to a mechanism for a piano, provided with an upper hammer which is mounted rotatably about a first axis and with a jack part which cooperates with the upper hammer and which is rotatably mounted about a second axis, which by pressing down the Mechanically assigned piano key is displaceable, the mechanism being provided with repelling means in order to exert a repulsive force between the top hammer and the jack part.
- German Patent No. 149 882 describes a piano mechanism with additional measures to increase the speed of petitioning.
- the mechanism there is provided with repelling means in order to exert a repelling force between the top hammer and the jack part; these repelling means are formed by a leaf spring (shown there with reference number 1), which is attached at one end to the top hammer (reference number d, i).
- This leaf spring is fastened in such a way that after a keystroke, when the key is held down, the spring (reference number 1) is pressed against the end of the jack (reference number c) and is thereby tensioned. This creates a repulsive effect between the two parts.
- a first disadvantage is that the spring force of the leaf spring after a know time course decreases, so that either the good effect of the mechanics decreases or a fine adjustment is necessary again and again.
- a second disadvantage lies in the fact that the leaf spring has to exert its effect in contact with another part of the mechanics, which part is covered with (sound-absorbing) felt in order to avoid disturbing background noises. This felt is subject to wear and must be replaced from time to time.
- the repelling means are formed by two permanent magnets, one of which is arranged on the top hammer and the other on the jack part, the magnetic poles of the same name being directed towards one another.
- the jack part can be attached to a lever which can be moved in the direction of the top hammer by depressing the piano key assigned to the mechanics.
- the repelling means can be formed by two permanent magnets, one of which is arranged on the top hammer and the other on the lever, in such a way that the magnet poles of the same name are directed towards one another.
- An advantageous embodiment of the mechanics according to the invention is characterized in that, when the piano key is not actuated and the mechanism is in a static state, the jack has direct contact with the butt and the top hammer is at a short distance from the folding strip material.
- This configuration has the effect that there is no play between the jack and the butt when the piano key is not actuated and the mechanical state is static. In order to achieve this, there must be a small distance between the flap strip material and the shaft of the top hammer when the piano key is not actuated and the mechanics are in a static state.
- a first advantage of this embodiment of the mechanism according to the invention is that when the piano key is depressed, it immediately has direct contact with the upper hammer, which has a favorable effect on the type of play and the repetition speed that can be achieved.
- a second advantage is that this setting is less critical, because when the leather is worn, the hammer butt only reduces the play between the folding strip material and the upper hammer shaft, which does not affect the good action of the mechanics.
- FIG. 1 shows a first embodiment of a mechanism according to the invention in the rest position
- FIG. 2 shows the mechanics from FIG. 1 with the four-key depressed
- FIG. 3 shows a second embodiment of the invention in the rest position
- Fig. 4 shows the mechanics of Fig. 3 with the depressed four key
- FIG. 5 shows a conventional mechanism for a piano, in which no measures have been taken to increase the repetition speed.
- FIG. 1 largely corresponds to a conventional mechanism according to FIG. 5, as has already been described above.
- a magnet holder 13 with a permanent magnet 14 and a magnet holder 15 with a permanent magnet 16 are added to FIG.
- the magnet holder 13 is constructed in such a way that it can be moved along the handle 27, which is located between the butt 11 and the counter-catcher 10.
- the magnet holder 15 is arranged at the top at the long end of the jack 2.
- the construction of the magnet holder 15 makes it possible for the magnet 16 to be displaced, so that the distance from the magnet 14 is variable.
- These magnets 14, 16 are arranged in the magnet holders 13, 15 such that two poles of the same name lie approximately opposite one another. As a result, the two magnets 14, 16 exert a repulsive force on one another, the size and direction of which are determined by the strength of the magnets 14, 16 and the position which they assume in relation to one another.
- the behavior of the mechanism according to FIG. 1 is identical to that of a conventional mechanism according to FIG. 5.
- the position in which the counter catcher 10 is caught by the catcher 9, is shown in Fig. 2.
- the magnet 16 is located approximately, but not exactly below the magnet 14. If the button, which was previously fully depressed, is moved up a little, the catcher 9 moves away from the counter catcher 10. The repelling force of the two magnets 14, 16 then ensures that the butt 11 remains at least in the same position. In the meantime, the upper end of the long part of the jack 2 moves in the direction of the mechanical beam 19 and at the same time downwards.
- the two magnets 14, 16 initially face each other straight. This could increase their repulsive effect; however, the favorable relative position of the two magnets is compensated for by the fact that the distance between the magnets has increased, so that the repelling effect remains approximately constant overall. If you let the button come up further, then before the button is fully raised, the end of the long part of the jack 2 will be placed under the butt 11 under the action of the spring 7 and the repulsive force of the magnets 14 and 16 , which means that the mechanics are ready for a next stop.
- the pivoting angle of the upper hammer 3 is limited by the flap bar 12 in order to make room for the jack 2 below the butt 11.
- the folding bar 12 is now used exclusively to prevent excessive overshoot of the upper hammer 3 and thereby to protect the bearing elements, in particular the hammer axis 26 of the upper hammer 3.
- FIG. 3 differs from that according to FIGS. 1 and 2 only in the arrangement of the magnets.
- a magnet 23 is arranged in an L-shaped holder 21 on top of the counter-catcher 10; the other magnet 24 is arranged in a holder 22, which is located on top of the catcher 9.
- Fig. 4 shows the mechanism of Fig. 3 in the state in which the piano key is depressed.
- the two magnets 23, 24 repel each other. If the piano key is released somewhat from the position shown, then the end 1 of this key drops a little. This releases the opponent
- the repetition speed of the mechanisms according to FIGS. 1 to 4 is considerably greater than the repetition speed of a conventional mechanism according to FIG. 5. This has a noticeably favorable effect on the playing of trills, double strokes and all fast, especially quiet passages, as well as on the repetition of a single note.
- the repetition rate of a mechanism according to FIGS. 1 to 4 is therefore comparable to the Speed of petition of a modern wing mechanism.
- the advantageous properties of the invention in the first embodiment include also achieved because the upper part of the jack 2 is pressed by the spring 7 almost during the entire pivoting angle of the top hammer 3 about the hammer axis 26 of the hammer butt 11, so that the magnet holder 15 together with its magnet 16 executes an approximately vertical stroke movement which extends over large areas approximately parallel to the likewise predominantly vertical movement of the other magnet 14, which pivots about the hammer axis 26.
- the two magnets 14, 16 are at an extremely small distance at all relevant rotary positions of the top hammer 3, so that even with magnets 14, 16 with only moderate pole strength a high repulsive force is already generated.
- the effect of the repelling magnets is inter alia reinforced because the upper magnet 23 is at a very large distance from the axis 26 of the top hammer 3 and consequently a moderate repulsive force already produces a high torque.
- Both embodiments have in common that the coupled magnets 14, 16; 23, 24 are arranged approximately one above the other, particularly in the relevant area of possible positions of the hammer 3.
- the moment arm perpendicular to the repelling magnetic force runs approximately horizontally and corresponds to the greatest distance between the upper magnet 14; 23 and the center point 26 of the rotary movement.
- the lower magnet 16; 24 during the advance of the upper hammer 3 to the string 4 under the other magnet 14; 23 through and then swing back under the same.
- the lower magnets 15; 24 are accordingly almost in the entire movement phase of the upper hammer 3 in the immediate vicinity of the movement curve of the upper magnet 14; 23 and can intercept it with its maximum magnetic force and / or hold it in the respective position when it snaps back independently of the respective position caused by the position of the button 1.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Electrophonic Musical Instruments (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4406296 | 1994-02-26 | ||
DE4406296A DE4406296A1 (de) | 1994-02-26 | 1994-02-26 | Mechanik für ein Klavier |
PCT/EP1995/000657 WO1995023403A1 (de) | 1994-02-26 | 1995-02-23 | Mechanik für ein klavier |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0746842A1 true EP0746842A1 (de) | 1996-12-11 |
EP0746842B1 EP0746842B1 (de) | 1997-12-10 |
Family
ID=6511277
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95911256A Expired - Lifetime EP0746842B1 (de) | 1994-02-26 | 1995-02-23 | Mechanik für ein klavier |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0746842B1 (de) |
JP (1) | JPH10500779A (de) |
KR (1) | KR970700900A (de) |
CN (1) | CN1142273A (de) |
AT (1) | ATE161114T1 (de) |
CZ (1) | CZ246296A3 (de) |
DE (2) | DE4406296A1 (de) |
PL (1) | PL315843A1 (de) |
WO (1) | WO1995023403A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69702318T2 (de) * | 1996-09-02 | 2001-02-08 | Erik Ingvor Petersen | Anschlagmechanik für ein saiteninstrument |
GB2331831A (en) * | 1997-12-01 | 1999-06-02 | Dietrich Heinrich Dotzek | Upright piano action employing attractive magnetic means |
DE19757178C1 (de) * | 1997-12-22 | 1999-06-10 | Kloeckner Moeller Gmbh | Verriegelungsvorrichtung |
FR2846455A1 (fr) * | 2002-10-29 | 2004-04-30 | Jean Marc Desmurs | Dispositif apte et destine a faciliter le rechargement d'une mecanique de piano droit |
CZ297498B6 (cs) * | 2004-04-28 | 2007-01-03 | Petrof, Spol. S R. O. | Úderový mechanismus mechanického klavíru |
JP3128574U (ja) * | 2006-10-30 | 2007-01-18 | 有限会社オフィスタスティ | ピアノ |
JP4489140B1 (ja) * | 2009-07-29 | 2010-06-23 | 有限会社藤井ピアノサービス | アップライトピアノのアクションの作動方法及びアップライトピアノのアクション |
JP6745042B2 (ja) * | 2017-01-10 | 2020-08-26 | カシオ計算機株式会社 | 鍵盤装置および鍵盤楽器 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE149882C (de) * | ||||
DE35765C (de) * | O. PFEIFFER, in Firma J. A. PFEIFFER & CO. in CO., in Stuttgart, Silberburgstrafse 120 | Auslösungs- und Fangvorrichtung an Pianino-Mechaniken | ||
FR445588A (fr) * | 1912-06-29 | 1912-11-14 | Jean Genet | Dispositif facilitant la répétition dans les pianos |
US1554977A (en) * | 1923-03-13 | 1925-09-22 | Borgarello Octavio Piovano | Mechanism of upright pianos |
GB717528A (en) * | 1952-03-06 | 1954-10-27 | Arthur Cyril Courtney Thorpe | Improvements in and relating to pianoforte movements |
GB8528451D0 (en) * | 1985-11-19 | 1985-12-24 | Herrburger Brooks Plc | Upright piano action |
US4896577A (en) * | 1987-10-02 | 1990-01-30 | Trivelas Chris A | Action for upright piano |
DE9004697U1 (de) * | 1990-04-26 | 1990-06-28 | Louis Renner Gmbh & Co., 7000 Stuttgart, De |
-
1994
- 1994-02-26 DE DE4406296A patent/DE4406296A1/de not_active Withdrawn
-
1995
- 1995-02-23 AT AT95911256T patent/ATE161114T1/de not_active IP Right Cessation
- 1995-02-23 EP EP95911256A patent/EP0746842B1/de not_active Expired - Lifetime
- 1995-02-23 JP JP7522128A patent/JPH10500779A/ja active Pending
- 1995-02-23 WO PCT/EP1995/000657 patent/WO1995023403A1/de not_active Application Discontinuation
- 1995-02-23 CN CN95191799A patent/CN1142273A/zh active Pending
- 1995-02-23 CZ CZ962462A patent/CZ246296A3/cs unknown
- 1995-02-23 PL PL95315843A patent/PL315843A1/xx unknown
- 1995-02-23 DE DE59501103T patent/DE59501103D1/de not_active Expired - Lifetime
- 1995-02-23 KR KR1019960704183A patent/KR970700900A/ko not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO9523403A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1995023403A1 (de) | 1995-08-31 |
CN1142273A (zh) | 1997-02-05 |
ATE161114T1 (de) | 1997-12-15 |
JPH10500779A (ja) | 1998-01-20 |
EP0746842B1 (de) | 1997-12-10 |
KR970700900A (ko) | 1997-02-12 |
DE4406296A1 (de) | 1995-08-31 |
CZ246296A3 (en) | 1997-05-14 |
DE59501103D1 (de) | 1998-01-22 |
PL315843A1 (en) | 1996-12-09 |
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