DE174193C - - Google Patents
Info
- Publication number
- DE174193C DE174193C DENDAT174193D DE174193DA DE174193C DE 174193 C DE174193 C DE 174193C DE NDAT174193 D DENDAT174193 D DE NDAT174193D DE 174193D A DE174193D A DE 174193DA DE 174193 C DE174193 C DE 174193C
- Authority
- DE
- Germany
- Prior art keywords
- membrane
- gramophones
- phonographs
- telephones
- sound
- 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 6
- 229920001875 Ebonite Polymers 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002023 wood 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
- H04R7/00—Diaphragms for electromechanical transducers; Cones
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE174193C true DE174193C (enrdf_load_html_response) |
Family
ID=438947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT174193D Active DE174193C (enrdf_load_html_response) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE174193C (enrdf_load_html_response) |
-
0
- DE DENDAT174193D patent/DE174193C/de active Active
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