GB191100590A - Improvements in and relating to Piano Players and like Instruments. - Google Patents

Improvements in and relating to Piano Players and like Instruments.

Info

Publication number
GB191100590A
GB191100590A GB191100590DA GB191100590A GB 191100590 A GB191100590 A GB 191100590A GB 191100590D A GB191100590D A GB 191100590DA GB 191100590 A GB191100590 A GB 191100590A
Authority
GB
United Kingdom
Prior art keywords
valves
pneumatic
valve
primary
chest
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
Application number
Inventor
William Henry Grimsdale
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
Application granted granted Critical
Publication of GB191100590A publication Critical patent/GB191100590A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10F—AUTOMATIC MUSICAL INSTRUMENTS
    • G10F5/00—Details or accessories
    • G10F5/04—Tune barrels, sheets, rollers, spools, or the like
    • G10F5/06—Driving or setting of tune barrels, discs, or the like; Winding, rewinding, or guiding of tune sheets or the like

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)

Abstract

590. Grimsdale, W. H. Jan. 9. Actions; expression, controlling.-Relates to pneumatic actions of the kind described in Specification 1767/10, in which several valves are provided for each striking-pneumatic, and the loudness of the notes sounded is determined by the width of the tune-sheet apertures. According to the present invention, both primary and secondary valves are employed. The primary valves e, f are controlled by pneumatics c, d, which are connected to the trackerbar by a pipe a. The valve f is normally held in the position shown by a spring s of adjustable tension, and is also connected to a pneumatic w, which assists it to open when the pneumatic t has been connected to the exhaust-chest v. The valves c, f connect the pneumatics l, m either to atmosphere or to the chest v, so operating valves n, o controlling ports of different areas between the striking pneumatic t and the chest v. The time-interval that elapses between the operation of the valves e, f, and therefore of the valves n, o, varies according to the quantity of air admitted by the tune-sheet to the pipe a. The suction acting upon the pneumatic @ and the loudness of the note therefore vary according to the width of the tune-sheet aperture. The valve n is adapted to close the atmospheric connexion of the pneumatic t. The pressure of the spring s on the valve f may be removed by the operation of the striking-pneumatic. In a modification, one of the primary valves is of conical shape so that the size of the connexion of the secondary pneumatic to atmospheric varies with the lift of the valve. The atmospheric connexion controlled by this valve may be normally closed by the other primary valve. In a further modification three primary and three secondary valves are provided, two of the primary valves being normally held closed by springs of different tentions. A device may be provided to ensure the closing of the third primary valve.
GB191100590D 1911-01-09 1911-01-09 Improvements in and relating to Piano Players and like Instruments. Expired GB191100590A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191100590T 1911-01-09

Publications (1)

Publication Number Publication Date
GB191100590A true GB191100590A (en) 1911-07-27

Family

ID=32365186

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191100590D Expired GB191100590A (en) 1911-01-09 1911-01-09 Improvements in and relating to Piano Players and like Instruments.

Country Status (1)

Country Link
GB (1) GB191100590A (en)

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