DE223610C - - Google Patents
Info
- Publication number
- DE223610C DE223610C DENDAT223610D DE223610DA DE223610C DE 223610 C DE223610 C DE 223610C DE NDAT223610 D DENDAT223610 D DE NDAT223610D DE 223610D A DE223610D A DE 223610DA DE 223610 C DE223610 C DE 223610C
- Authority
- DE
- Germany
- Prior art keywords
- microphone
- movable
- contact
- spring
- contacts
- 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
- 230000005540 biological transmission Effects 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 230000006698 induction Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 241000947840 Alteromonadales Species 0.000 description 1
- 229920001875 Ebonite Polymers 0.000 description 1
- 241001422033 Thestylus Species 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000012811 non-conductive material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 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
- H04R21/04—Gramophone pick-ups using a stylus; Recorders using a stylus
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB190907605T | 1909-03-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE223610C true DE223610C (enrdf_load_stackoverflow) |
Family
ID=32443206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT223610D Active DE223610C (enrdf_load_stackoverflow) | 1909-03-30 |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE223610C (enrdf_load_stackoverflow) |
| FR (1) | FR405273A (enrdf_load_stackoverflow) |
| GB (1) | GB190907605A (enrdf_load_stackoverflow) |
-
0
- DE DENDAT223610D patent/DE223610C/de active Active
-
1909
- 1909-03-30 GB GB190907605D patent/GB190907605A/en not_active Expired
- 1909-07-21 FR FR405273A patent/FR405273A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB190907605A (en) | 1909-09-30 |
| FR405273A (fr) | 1909-12-24 |
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