US1706757A - Pneumatic action for grand planos - Google Patents

Pneumatic action for grand planos Download PDF

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Publication number
US1706757A
US1706757A US236770A US23677027A US1706757A US 1706757 A US1706757 A US 1706757A US 236770 A US236770 A US 236770A US 23677027 A US23677027 A US 23677027A US 1706757 A US1706757 A US 1706757A
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Prior art keywords
action
grand
piano
pneumatic
regulating means
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Expired - Lifetime
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US236770A
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Herschel E Tower
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BALDWIN Co
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BALDWIN CO
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Priority to US236770A priority Critical patent/US1706757A/en
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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10F—AUTOMATIC MUSICAL INSTRUMENTS
    • G10F1/00—Automatic musical instruments
    • G10F1/02—Pianofortes with keyboard

Definitions

  • This invention relates to improvements in mechanical musical instruments of the grand piano ty e, the keys of which are actuated from un erneath and thru the keybed by an auxiliary action actuated by any well known type of player action.
  • the object of my invention is to promote accessibility, easy unitary methods of installation, quick, accurate and positive regulation of various working parts and the transmis sion of power from the player action as directly and freely as possible, to the piano action, particular attention being given to the novel working assembly of the component units resulting in unusual accessibilty of all working regulations.
  • Fig. 1 is a cross section taken from the side.
  • Fig. 2 is a rear view with the pneumatics, chests and parts of the finger omitted.
  • a grand piano having a keybed 1 has a key 2 that actuates a piano action 3 for striking a string 4 to produce a musical sound.
  • the keybed 1 Underneath the keybed 1 is an auxiliary action consisting of a supporting rail 5, flanges 6, levers 7 stickers 8, lugs 9 and regulating means 10.
  • a player action consisting of shelves 11, striking pneumatics 12, fingers 13 and regulating means 14.
  • these mechanisms are assembled and installed as units; i. e., the keys and piano action are installed as one unit and then the auxiliary action is installed in proper working relation to the keys 2. The player action is then installed so that the regulating means 14 is in proper relation to the lugs 9 on the stickers 8.
  • the lugs 9 in the drawing are on separate stickers, (see Fig. 2 ⁇ being alternated from note to note in the scale.
  • the regulating means 14 are adjusted to hold sticker 8 in close contact with the key 2, allowing no lost motion and consequent loss of power at that point.
  • the regulating means 10, working to a stop against the rail 5 are for the purpose of limiting the movement of the sticker 8, which in turn will stroke or lift to the key 2. It will be seen by this arrangement that the transmission of power from the striking pneumatic 12 to the. key 2 is very direct an eificient.
  • the moving leaf of the pneumatic 12 is made of such weight as to balance the weight of the finger 13, regulating means 14, sticker 8 and correlated parts,insuring that after the regulating means 14 is once adjusted the sticker 8 will always stay in close contact with the key 2.
  • I 1 In a grand piano having piano keys and piano action, a pneumatic'player action and a detachable auxiliary action between the pneumatic player action and the piano keys; regulating means on the pneumatic player action for adjusting the auxiliary action relagive the proper tive to the piano keys and regulating means on the auxiliary action for limiting the movement thereof.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Auxiliary Devices For Music (AREA)

Description

March 26, 1929. H TOWER 1,706,757
PNEUMATIC ACTION FOR GRAND PIANOS Filed Nov. 50, 1927 2 Sheets-Sheet l March 26, 1929. TOWER 1,706,757
PNEUMATIC ACTION FOR GRAND PIANOS Filed Nov. 30, 1927 2 Sheets-Sheet 2 WITNESSES /NVEN TOR Patented Mar. 26, 1929.-
UNITED STATES PATENT OFFICE.
HERSCHEL E. TOWER, OF CINCINNATI, OHIO, ASSIGNOR TO THE BALDWIN COMPANY, OF CINCINNATI, OI-IIO.
PNEUMATIC ACTION FOR GRAND PIANOS.
Application filed November 30, 1927. Serial No. 236,770.
This invention relates to improvements in mechanical musical instruments of the grand piano ty e, the keys of which are actuated from un erneath and thru the keybed by an auxiliary action actuated by any well known type of player action.
The object of my invention is to promote accessibility, easy unitary methods of installation, quick, accurate and positive regulation of various working parts and the transmis sion of power from the player action as directly and freely as possible, to the piano action, particular attention being given to the novel working assembly of the component units resulting in unusual accessibilty of all working regulations.
The drawings show a working application of my invention as applied to a grand piano and gives a clear conception of the relative positions of the player action unit, the auxiliary action and the piano key and action.
Fig. 1 is a cross section taken from the side. Fig. 2 is a rear view with the pneumatics, chests and parts of the finger omitted.
A grand piano having a keybed 1 has a key 2 that actuates a piano action 3 for striking a string 4 to produce a musical sound. Underneath the keybed 1 is an auxiliary action consisting of a supporting rail 5, flanges 6, levers 7 stickers 8, lugs 9 and regulating means 10. In working relation to this auxiliary action is a player action consisting of shelves 11, striking pneumatics 12, fingers 13 and regulating means 14. i
In practice, these mechanisms are assembled and installed as units; i. e., the keys and piano action are installed as one unit and then the auxiliary action is installed in proper working relation to the keys 2. The player action is then installed so that the regulating means 14 is in proper relation to the lugs 9 on the stickers 8. The lugs 9 in the drawing are on separate stickers, (see Fig. 2} being alternated from note to note in the scale.
After the player action has been installed the regulating means 14 are adjusted to hold sticker 8 in close contact with the key 2, allowing no lost motion and consequent loss of power at that point. The regulating means 10, working to a stop against the rail 5 are for the purpose of limiting the movement of the sticker 8, which in turn will stroke or lift to the key 2. It will be seen by this arrangement that the transmission of power from the striking pneumatic 12 to the. key 2 is very direct an eificient.
The moving leaf of the pneumatic 12 is made of such weight as to balance the weight of the finger 13, regulating means 14, sticker 8 and correlated parts,insuring that after the regulating means 14 is once adjusted the sticker 8 will always stay in close contact with the key 2.
Many modifications may be made but what I claim as my invention is:
I 1. In a grand piano having piano keys and piano action, a pneumatic'player action and a detachable auxiliary action between the pneumatic player action and the piano keys; regulating means on the pneumatic player action for adjusting the auxiliary action relagive the proper tive to the piano keys and regulating means on the auxiliary action for limiting the movement thereof.
2. In a grand piano having piano keys, at keybed and piano action, a pneumatic player action and an auxiliary action and means for attaching the auxiliary action to the surface of the keybed between the pneumatic player action and the piano keys; regulating means for adj using the auxiliary action rela tive to the piano keys and regulating means on the auxiliary action for limiting the movement thereof.
TIERSCHEL n. TOWER.
US236770A 1927-11-30 1927-11-30 Pneumatic action for grand planos Expired - Lifetime US1706757A (en)

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