GB139151A - Improvements in pneumatic actions for mechanical piano-players and the like apparatus - Google Patents
Improvements in pneumatic actions for mechanical piano-players and the like apparatusInfo
- Publication number
- GB139151A GB139151A GB30511/19A GB3051119A GB139151A GB 139151 A GB139151 A GB 139151A GB 30511/19 A GB30511/19 A GB 30511/19A GB 3051119 A GB3051119 A GB 3051119A GB 139151 A GB139151 A GB 139151A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- apertures
- flanged
- edges
- chambers
- 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
Links
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10F—AUTOMATIC MUSICAL INSTRUMENTS
- G10F1/00—Automatic musical instruments
- G10F1/02—Pianofortes with keyboard
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
- Nozzles For Electric Vacuum Cleaners (AREA)
Abstract
139,151. Fricotel, J. J. M., and Herrburger, J. J. Feb. 15, 1919, [Convention date]. Actions, pneumatic. The vacuum chamber 1 has a number of apertures 2 upon each of which is fixed the lower part 3 of a valve chamber, which also constitutes a suction duct and is composed of two pieces 3, 10 of identically similar shape, the flanged edges of which are connected by screws. The valve chambers are fixed in the vacuum chambers by means of air-tight beaded joints. In the form shown in Fig. 1, the valvebox 4 has an extension 5 which engages in the adjacent apertures of the valve and vacuum chambers and, in order to secure an air-tight joint, is beaded to form a flanged edge 6. Or the joint may be made by beading a flat ring over the adjacent inner edges of the valve-box and vacuum chamber, or by beading over the flanged lower edges of the valve chamber itself. The valve-box 4 is formed with inwardly projecting flutes 7, Fig. 3, for guiding the valve 9, and has apertures 8 near its base.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR139151X | 1919-02-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB139151A true GB139151A (en) | 1920-09-09 |
Family
ID=8874442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB30511/19A Expired GB139151A (en) | 1919-02-15 | 1919-12-05 | Improvements in pneumatic actions for mechanical piano-players and the like apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB139151A (en) |
-
1919
- 1919-12-05 GB GB30511/19A patent/GB139151A/en not_active Expired
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