DE201831C - - Google Patents
Info
- Publication number
- DE201831C DE201831C DENDAT201831D DE201831DA DE201831C DE 201831 C DE201831 C DE 201831C DE NDAT201831 D DENDAT201831 D DE NDAT201831D DE 201831D A DE201831D A DE 201831DA DE 201831 C DE201831 C DE 201831C
- Authority
- DE
- Germany
- Prior art keywords
- disc
- ring
- disk
- carbon
- disks
- 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 239000003245 coal Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 4
- 229920001875 Ebonite Polymers 0.000 claims description 3
- 239000012188 paraffin wax Substances 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims 1
- 239000002184 metal Substances 0.000 description 4
- 206010044565 Tremor Diseases 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R21/00—Variable-resistance transducers
- H04R21/02—Microphones
- H04R21/021—Microphones with granular resistance material
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Paper (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE201831C true DE201831C (cg-RX-API-DMAC10.html) |
Family
ID=464355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT201831D Active DE201831C (cg-RX-API-DMAC10.html) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE201831C (cg-RX-API-DMAC10.html) |
-
0
- DE DENDAT201831D patent/DE201831C/de active Active
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