BE506348A - - Google Patents
Info
- Publication number
- BE506348A BE506348A BE506348DA BE506348A BE 506348 A BE506348 A BE 506348A BE 506348D A BE506348D A BE 506348DA BE 506348 A BE506348 A BE 506348A
- 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
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2748882X | 1950-10-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE506348A true BE506348A (en) |
Family
ID=10914586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE506348D BE506348A (en) | 1950-10-11 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2748882A (en) |
| BE (1) | BE506348A (en) |
| DE (1) | DE934896C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3153463A (en) * | 1961-08-30 | 1964-10-20 | Muter Company | Compound loudspeaker diaphragm |
| US3144801A (en) * | 1962-11-23 | 1964-08-18 | Kent A Abreo | Musical instrument |
| US4288663A (en) * | 1980-03-05 | 1981-09-08 | Roanwell Corporation | Noise canceling transmitter |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE612120C (en) * | 1935-04-13 | Lorenz Akt Ges C | Electrical apparatus, in particular telecommunication device, with a capsule serving as a membrane | |
| US1759387A (en) * | 1928-10-16 | 1930-05-20 | Specialty Insulation Mfg Compa | Acoustic diaphragm and process for its manufacture |
| US1815987A (en) * | 1929-02-13 | 1931-07-28 | Charles W Peterson | Conical diaphragm for loud speakers |
| GB425186A (en) * | 1933-11-24 | 1935-03-08 | Alfred Graham & Co Ltd | Improvements relating to telephones |
| US2162270A (en) * | 1934-02-06 | 1939-06-13 | Bell Telephone Labor Inc | Acoustic device |
| GB577969A (en) * | 1935-02-15 | 1936-11-05 | Hubert Dewhurst | Improvements in or relating to microphones |
| US2345078A (en) * | 1940-02-20 | 1944-03-28 | Ueberschuss Albert | Carbon microphone |
| US2351400A (en) * | 1940-07-29 | 1944-06-13 | Sonotone Corp | Microphone |
| BE464238A (en) * | 1945-04-21 | |||
| US2609458A (en) * | 1948-01-16 | 1952-09-02 | Vigren Sten Daniel | Telephone apparatus |
| US2520646A (en) * | 1948-09-09 | 1950-08-29 | Bell Telephone Labor Inc | Electroacoustic transducer |
| US2646853A (en) * | 1948-11-11 | 1953-07-28 | Int Standard Electric Corp | Compliant supports for transducer diaphragms |
| US2540498A (en) * | 1949-03-18 | 1951-02-06 | Bell Telephone Labor Inc | Microphone damping system having rear openings |
-
0
- BE BE506348D patent/BE506348A/xx unknown
-
1951
- 1951-10-08 US US250217A patent/US2748882A/en not_active Expired - Lifetime
- 1951-10-11 DE DEI4714A patent/DE934896C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2748882A (en) | 1956-06-05 |
| DE934896C (en) | 1955-11-10 |