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
  • G10C3/12—Keyboards; Keys

Definitions

• the invention relates to a system for balancing upright piano key mechanisms, which is adapted to make said mechanisms more closely resemble those of grand pianos as to respondence.
• Object of the present invention is to overcome the shortcomings discussed above, by providing a balancing system for keys and key mechanisms of upright pianos, which equilibrates the balancing static forces, thus allowing a more direct respondence of the key mechanisms to the pianist's touch on the key.
• the system object of the invention consists in weighting the key in its front portion, opposite to the portion where the key downweight is usually placed , and consequently in weighting, by means of a weight simulating the weight of the hammer, also the portion where the hammer rests, the hammer in turn resting, through the wippen, on the rear portion of the key, so as to create a balance between the front portion and the rear portion of the key.
• FIG . 1 schematically illustrates a side view of a prior art key mechanism
• FIG. 2 is a schematic view of the forces balanced according to FIG. 1 ;
• FIG. 3 schematically illustrates a key action with the key mechanisms modified in accordance with the invention
• FIG. 4 is a schematic view of the forces balanced according to FIG. 3.
• the key 1 acting on the key mechanism 3 has a downweight in 5 on the portion opposite to the one played by the pianist.
• Said sensitivity is typical of the grand piano and is what distinguishes the performance on such a piano from that on an upright piano.
• FIG. 2 schematically shows the combined forces acting in an upright piano according to the prior art discussed above: F1 is the force exerted by the pianist, F2 is the force of the lead 5, and F3 is the weight of the wippen 9 on the key 1
• the arrangement according to the invention tries to simulate the combination of forces existing in horizontal pianos, i e to obtain a balanced key which transmits the force of the pianist directly on the hammer and from the hammer to the strings.
• FIG. 3 indicates the arrangement object of the invention, wherein the key 1 is weighted at 11 by means of appropriate keyleads on a portion which is the front one with respect to the fulcrum 13, and the wippen 9 weighted at 15 by means of an appropriate balancing weight, or weight simulating the weight of the hammer 7, rests on the said key
• said weight 15 on the wippen 9 is applied on the hammer back check 17, but obviously this does not limit the invention

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• Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Acoustics & Sound (AREA)
• Multimedia (AREA)
• Electrophonic Musical Instruments (AREA)
• Casting Devices For Molds (AREA)
• Golf Clubs (AREA)

Priority Applications (6)

Applications Claiming Priority (2)

Publications (2)

Family

ID=11415763

Family Applications (1)

Country Status (10)

Cited By (1)

Families Citing this family (5)

Citations (5)

Family Cites Families (3)

• 1997
  • 1997-06-06 IT IT97TO000493A patent/IT1293925B1/it active IP Right Grant
  • 1997-09-15 JP JP11501360A patent/JP2000516357A/ja active Pending
  • 1997-09-15 CN CN97197068A patent/CN1227656A/zh active Pending
  • 1997-09-15 US US09/230,634 patent/US6096959A/en not_active Expired - Fee Related
  • 1997-09-15 CZ CZ99395A patent/CZ39599A3/cs unknown
  • 1997-09-15 AT AT97909270T patent/ATE218000T1/de not_active IP Right Cessation
  • 1997-09-15 WO PCT/EP1997/005043 patent/WO1998055989A1/en active IP Right Grant
  • 1997-09-15 PL PL97331560A patent/PL331560A1/xx unknown
  • 1997-09-15 EP EP97909270A patent/EP0917704B1/en not_active Expired - Lifetime
  • 1997-09-15 DE DE69712762T patent/DE69712762T2/de not_active Expired - Fee Related

Patent Citations (5)

Non-Patent Citations (1)

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