BE488632A - - Google Patents
Info
- Publication number
- BE488632A BE488632A BE488632DA BE488632A BE 488632 A BE488632 A BE 488632A BE 488632D A BE488632D A BE 488632DA BE 488632 A BE488632 A BE 488632A
- Authority
- BE
- Belgium
Links
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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB277063X | 1948-04-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE488632A true BE488632A (fr) |
Family
ID=10263970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE488632D BE488632A (fr) | 1948-04-23 |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE488632A (fr) |
| CH (1) | CH277063A (fr) |
| DE (1) | DE873102C (fr) |
| FR (2) | FR984897A (fr) |
| GB (1) | GB670586A (fr) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE952823C (de) * | 1953-12-02 | 1956-11-22 | Friedrich Reiner | Befestigung von Kohleelektroden an Metall- oder Kunststoffmembranen fuer Kohlekoernermikrofone |
| DE960998C (de) * | 1954-02-26 | 1957-03-28 | Standard Elek K Ag | Kohlemikrofon mit beweglicher Tauchelektrode |
| DE1061825B (de) * | 1954-02-26 | 1959-07-23 | Hans Widmaier | Kohlegriessmikrophon-Sprechkapsel |
| DE1095318B (de) * | 1955-03-18 | 1960-12-22 | Standard Elektrik Lorenz Ag | Kohlemikrofon mit beweglicher Tauchelektrode |
| DE1125485B (de) * | 1959-03-25 | 1962-03-15 | Siemens Ag | Kohlemikrofon |
| DE1181745B (de) * | 1962-09-15 | 1964-11-19 | Telefonbau | Widerstandsmikrofon, insbesondere Kohlemikrofon |
-
0
- BE BE488632D patent/BE488632A/xx unknown
-
1948
- 1948-04-23 GB GB11184/48A patent/GB670586A/en not_active Expired
-
1949
- 1949-03-17 CH CH277063D patent/CH277063A/de unknown
- 1949-04-21 FR FR984897D patent/FR984897A/fr not_active Expired
-
1950
- 1950-10-01 DE DEST2547A patent/DE873102C/de not_active Expired
-
1951
- 1951-10-10 FR FR63027D patent/FR63027E/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR63027E (fr) | 1955-07-13 |
| CH277063A (de) | 1951-08-15 |
| GB670586A (en) | 1952-04-23 |
| FR984897A (fr) | 1951-07-11 |
| DE873102C (de) | 1953-04-09 |