GB140864A - Improvements in tracker devices for electric piano players - Google Patents

Improvements in tracker devices for electric piano players

Info

Publication number
GB140864A
GB140864A GB131519A GB131519A GB140864A GB 140864 A GB140864 A GB 140864A GB 131519 A GB131519 A GB 131519A GB 131519 A GB131519 A GB 131519A GB 140864 A GB140864 A GB 140864A
Authority
GB
United Kingdom
Prior art keywords
tracker
balls
bar
spring
electric piano
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
GB131519A
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 GB131519A priority Critical patent/GB140864A/en
Publication of GB140864A publication Critical patent/GB140864A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10F—AUTOMATIC MUSICAL INSTRUMENTS
    • G10F5/00—Details or accessories
    • G10F5/02—Actions

Landscapes

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

Abstract

140,864. Compare, M., and Pizzi, E. Jan. 18, 1919. Actions, electric. A tracker-bar for an electrically-operated piano-player has a spring-pressed metal ball 5 corresponding to each note and making contact through the perforations with a metal cylinder 6 on the other side of the paper. Each ball 5 is electrically connected through its spring 4 or a flexible wire with a flexible lead 9 connected to the electro-magnet operating the corresponding note. The balls 5 project through apertures in a curved plate 7 of less diameter than the balls. The tracker-bar may be made of black fibre.
GB131519A 1919-01-18 1919-01-18 Improvements in tracker devices for electric piano players Expired GB140864A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB131519A GB140864A (en) 1919-01-18 1919-01-18 Improvements in tracker devices for electric piano players

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB131519A GB140864A (en) 1919-01-18 1919-01-18 Improvements in tracker devices for electric piano players

Publications (1)

Publication Number Publication Date
GB140864A true GB140864A (en) 1920-04-08

Family

ID=9719837

Family Applications (1)

Application Number Title Priority Date Filing Date
GB131519A Expired GB140864A (en) 1919-01-18 1919-01-18 Improvements in tracker devices for electric piano players

Country Status (1)

Country Link
GB (1) GB140864A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2751838A1 (en) * 1977-10-26 1979-05-03 Bbc Brown Boveri & Cie METHOD OF APPLYING A LUBRICANT FILM

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2751838A1 (en) * 1977-10-26 1979-05-03 Bbc Brown Boveri & Cie METHOD OF APPLYING A LUBRICANT FILM

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