BG20138A3 - - Google Patents
Info
- Publication number
- BG20138A3 BG20138A3 BG16089A BG1608970A BG20138A3 BG 20138 A3 BG20138 A3 BG 20138A3 BG 16089 A BG16089 A BG 16089A BG 1608970 A BG1608970 A BG 1608970A BG 20138 A3 BG20138 A3 BG 20138A3
- Authority
- BG
- Bulgaria
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
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/16—Mounting or tensioning of diaphragms or cones
- H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1961217A DE1961217C3 (en) | 1969-12-05 | 1969-12-05 | Electroacoustic transducers, in particular microphones for telephone systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BG20138A3 true BG20138A3 (en) | 1975-10-30 |
Family
ID=5753162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BG16089A BG20138A3 (en) | 1969-12-05 | 1970-11-18 |
Country Status (13)
| Country | Link |
|---|---|
| AT (1) | AT308860B (en) |
| BE (1) | BE759888A (en) |
| BG (1) | BG20138A3 (en) |
| BR (1) | BR7024166D0 (en) |
| CH (1) | CH522995A (en) |
| DE (1) | DE1961217C3 (en) |
| FI (1) | FI56601C (en) |
| FR (1) | FR2070741B1 (en) |
| GB (1) | GB1293670A (en) |
| LU (1) | LU62172A1 (en) |
| NL (1) | NL172504C (en) |
| SE (1) | SE366190B (en) |
| ZA (1) | ZA708029B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2119911B2 (en) * | 1971-04-23 | 1973-11-15 | Siemens Ag, 1000 Berlin U. 8000 Muenchen | Electroacoustic converter, in particular microphone for telephone systems |
| DE2831411C2 (en) * | 1978-07-17 | 1983-10-06 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Electroacoustic transducer with a diaphragm provided with a piezoelectric layer |
| DE2937922A1 (en) * | 1979-09-19 | 1981-04-09 | Siemens AG, 1000 Berlin und 8000 München | PIEZOELECTRIC CONVERTER |
| DE3005708C2 (en) * | 1980-02-15 | 1984-08-30 | Siemens AG, 1000 Berlin und 8000 München | Transducer plate for piezoelectric transducers |
| DE3425173A1 (en) * | 1984-07-09 | 1986-01-16 | Fernsprech- und Signalbaugesellschaft mbH Schüler & Vershoven, 4300 Essen | Piezoelectric telephone capsule |
| DE3425176A1 (en) * | 1984-07-09 | 1986-02-20 | Fernsprech Und Signalbau Kg Sc | Piezoelectric telephone capsule |
| DE3518819A1 (en) * | 1985-05-24 | 1986-11-27 | Siemens AG, 1000 Berlin und 8000 München | Electro-acoustic transducer |
| DE3609461A1 (en) * | 1986-03-20 | 1987-09-24 | Siemens Ag | ELECTROACOUSTIC CONVERTER |
| DE8712014U1 (en) * | 1987-09-04 | 1987-10-29 | Chen, Ding Pang, Taipeh/T'ai-Pei, Tw | |
| CN1015289B (en) * | 1988-08-10 | 1992-01-01 | 西门子公司 | Electroacoustic transducer |
| CN114390405B (en) * | 2021-12-10 | 2023-11-28 | 深圳羽声电子有限公司 | Vibrating diaphragm and use its audio amplifier |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB112333A (en) * | 1917-01-24 | 1918-01-10 | Alexander Marr | Improvements in or relating to Apparatus for the Reproduction of Sounds. |
| FR1334235A (en) * | 1961-09-29 | 1963-08-02 | Siemens Ag | Electro-acoustic transformer |
| DE1288146B (en) * | 1962-10-31 | 1969-01-30 | Siemens Ag | Electroacoustic converter |
-
0
- BE BE759888D patent/BE759888A/en not_active IP Right Cessation
-
1969
- 1969-12-05 DE DE1961217A patent/DE1961217C3/en not_active Expired
-
1970
- 1970-11-05 CH CH1639370A patent/CH522995A/en not_active IP Right Cessation
- 1970-11-11 AT AT1015070A patent/AT308860B/en not_active IP Right Cessation
- 1970-11-17 GB GB54534/70D patent/GB1293670A/en not_active Expired
- 1970-11-18 BG BG16089A patent/BG20138A3/xx unknown
- 1970-11-25 NL NLAANVRAGE7017251,A patent/NL172504C/en not_active IP Right Cessation
- 1970-11-26 BR BR224166/70A patent/BR7024166D0/en unknown
- 1970-11-26 ZA ZA708029A patent/ZA708029B/en unknown
- 1970-12-03 LU LU62172D patent/LU62172A1/xx unknown
- 1970-12-03 FR FR7043478A patent/FR2070741B1/fr not_active Expired
- 1970-12-03 FI FI3263/70A patent/FI56601C/en active
- 1970-12-07 SE SE16544/70A patent/SE366190B/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FI56601B (en) | 1979-10-31 |
| FR2070741A1 (en) | 1971-09-17 |
| FR2070741B1 (en) | 1976-03-19 |
| NL172504C (en) | 1983-09-01 |
| DE1961217B2 (en) | 1972-10-12 |
| DE1961217C3 (en) | 1978-08-24 |
| LU62172A1 (en) | 1971-05-12 |
| SE366190B (en) | 1974-04-08 |
| BR7024166D0 (en) | 1973-01-09 |
| AT308860B (en) | 1973-07-25 |
| NL7017251A (en) | 1971-06-08 |
| BE759888A (en) | 1971-06-04 |
| GB1293670A (en) | 1972-10-18 |
| NL172504B (en) | 1983-04-05 |
| CH522995A (en) | 1972-05-15 |
| FI56601C (en) | 1980-02-11 |
| ZA708029B (en) | 1971-08-25 |
| DE1961217A1 (en) | 1971-06-16 |