1894 Patent No. 19,586 pneumatic action mechanical keyboard, Franz Hanke, Berlin
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Patent No. 19,586 A.D.1894 Improvements in Pneumatic Actions or Relays for Mechanically Played Keyboard Musical Instruments.
"I, Framz HJamle. pf 9 pt. Strassburgerstrasse, Berlin, in the Empire of Germany, Organbuilder, do hereby declare the nature of this invention and in what manner the same is to be performed, to be particularly described and ascertained in and by the following statement: This invention relates to a pneumatic action or relay for keyboard musical instruments that are played mechanically, the said action or relay being operated by a partial vacuum of suction instead of by compressed air..."
2 pages of text + 1 drawing which have been disbound from a larger volume.
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| Annonstyp | Galleriannons |
| Annons-ID#: | 230421622 |
| Starttid | Tor 02 Okt 2025 14:38:01 (CEST) |
| Sluttid | Lör 01 nov 2025 14:38:01 (CEST) |
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| Produktvillkor | Begagnad |
| Bud | 0 |
| Visningar | 8 |
| Avsändningstid (inkluderar inte söndagar) | 3 dagar |
| Antal | 1 |
| Plats | Storbritannien |
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