BE407715A - - Google Patents
Info
- Publication number
- BE407715A BE407715A BE407715DA BE407715A BE 407715 A BE407715 A BE 407715A BE 407715D A BE407715D A BE 407715DA BE 407715 A BE407715 A BE 407715A
- 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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/04—Construction, mounting, or centering of coil
- H04R9/041—Centering
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US631039A US1893049A (en) | 1932-08-30 | 1932-08-30 | Sound producing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE407715A true BE407715A (ro) |
Family
ID=24529528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE407715D BE407715A (ro) | 1932-08-30 |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US1893049A (ro) |
| BE (1) | BE407715A (ro) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2469773A (en) * | 1934-06-04 | 1949-05-10 | Jensen Mfg Company | Loud-speaker diaphragm support member |
| US3247925A (en) * | 1962-03-08 | 1966-04-26 | Lord Corp | Loudspeaker |
| US4926486A (en) * | 1987-07-17 | 1990-05-15 | Barsumian Bruce R | Transducer assembly for automatic message system |
| CN1655645A (zh) * | 1995-09-02 | 2005-08-17 | 新型转换器有限公司 | 扬声器以及使用扬声器的设备 |
-
0
- BE BE407715D patent/BE407715A/xx unknown
-
1932
- 1932-08-30 US US631039A patent/US1893049A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US1893049A (en) | 1933-01-03 |