BE343941A - - Google Patents
Info
- Publication number
- BE343941A BE343941A BE343941DA BE343941A BE 343941 A BE343941 A BE 343941A BE 343941D A BE343941D A BE 343941DA BE 343941 A BE343941 A BE 343941A
- 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
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
- H04R17/04—Gramophone pick-ups using a stylus; Recorders using a stylus
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US124919A US1717263A (en) | 1926-07-26 | 1926-07-26 | Sound reproducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE343941A true BE343941A (pm) |
Family
ID=22417421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE343941D BE343941A (pm) | 1926-07-26 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US1717263A (pm) |
| BE (1) | BE343941A (pm) |
| FR (1) | FR638286A (pm) |
| GB (1) | GB264103A (pm) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2452570A (en) * | 1933-05-05 | 1948-11-02 | Submarine Signal Co | Compressional wave transmitting and receiving device |
| US2457563A (en) * | 1944-04-10 | 1948-12-28 | Dan W Keller | Crystal mounting |
| US2451966A (en) * | 1944-11-18 | 1948-10-19 | Brush Dev Co | Transducer |
| US2485129A (en) * | 1945-03-19 | 1949-10-18 | Brush Dev Co | Piezoelectric crystal plate |
| US2585040A (en) * | 1949-03-23 | 1952-02-12 | Frederick Hart & Co Inc | Electromagnetic recording head |
| US5672929A (en) * | 1992-03-03 | 1997-09-30 | The Technology Partnership Public Limited Company | Moving sensor using mechanical vibrations |
-
0
- BE BE343941D patent/BE343941A/xx unknown
-
1926
- 1926-07-26 US US124919A patent/US1717263A/en not_active Expired - Lifetime
- 1926-09-29 GB GB24061/26A patent/GB264103A/en not_active Expired
-
1927
- 1927-07-18 FR FR638286D patent/FR638286A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR638286A (fr) | 1928-05-21 |
| US1717263A (en) | 1929-06-11 |
| GB264103A (en) | 1927-01-13 |