DE139373C - - Google Patents
Info
- Publication number
- DE139373C DE139373C DENDAT139373D DE139373DA DE139373C DE 139373 C DE139373 C DE 139373C DE NDAT139373 D DENDAT139373 D DE NDAT139373D DE 139373D A DE139373D A DE 139373DA DE 139373 C DE139373 C DE 139373C
- Authority
- DE
- Germany
- Prior art keywords
- air
- valve
- membrane
- wind pressure
- pipe
- 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.)
- Active
Links
- 239000012528 membrane Substances 0.000 claims description 36
- 238000005452 bending Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 10
- 238000004891 communication Methods 0.000 description 7
- 230000001105 regulatory effect Effects 0.000 description 7
- 230000000994 depressogenic effect Effects 0.000 description 3
- 230000001944 accentuation Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10F—AUTOMATIC MUSICAL INSTRUMENTS
- G10F5/00—Details or accessories
-
- 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)
- Toys (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE139373C true DE139373C (en:Method) |
Family
ID=407125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT139373D Active DE139373C (en:Method) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE139373C (en:Method) |
-
0
- DE DENDAT139373D patent/DE139373C/de active Active
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