FR844299A - Dispositifs acoustiques - Google Patents
Dispositifs acoustiquesInfo
- Publication number
- FR844299A FR844299A FR844299DA FR844299A FR 844299 A FR844299 A FR 844299A FR 844299D A FR844299D A FR 844299DA FR 844299 A FR844299 A FR 844299A
- Authority
- FR
- France
- Prior art keywords
- acoustic devices
- acoustic
- devices
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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
- H04R11/00—Transducers of moving-armature or moving-core type
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US167546A US2171733A (en) | 1937-10-06 | 1937-10-06 | Acoustic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR844299A true FR844299A (fr) | 1939-07-21 |
Family
ID=22607812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR844299D Expired FR844299A (fr) | 1937-10-06 | 1938-10-04 | Dispositifs acoustiques |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2171733A (fr) |
| FR (1) | FR844299A (fr) |
| GB (1) | GB506480A (fr) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2642338A (en) * | 1944-02-12 | 1953-06-16 | Robert D Pike | Method of and apparatus for producing nitric oxide |
| US2535757A (en) * | 1946-06-25 | 1950-12-26 | John J Root | Peripherally driven electroacoustical transducer |
| US2522530A (en) * | 1946-10-19 | 1950-09-19 | Bell Telephone Labor Inc | Electroacoustic transducer |
| DE1108267B (de) * | 1958-09-12 | 1961-06-08 | Siemens Ag | Elektroakustischer Wandler mit Ringanker |
-
1937
- 1937-10-06 US US167546A patent/US2171733A/en not_active Expired - Lifetime
-
1938
- 1938-09-09 GB GB26385/38A patent/GB506480A/en not_active Expired
- 1938-10-04 FR FR844299D patent/FR844299A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB506480A (en) | 1939-05-30 |
| US2171733A (en) | 1939-09-05 |
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