FR939303A - Perfectionnements aux dispositifs électro-magnétiques - Google Patents
Perfectionnements aux dispositifs électro-magnétiquesInfo
- Publication number
- FR939303A FR939303A FR939303DA FR939303A FR 939303 A FR939303 A FR 939303A FR 939303D A FR939303D A FR 939303DA FR 939303 A FR939303 A FR 939303A
- Authority
- FR
- France
- Prior art keywords
- electro
- magnetic devices
- magnetic
- 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
- H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB266931X | 1940-11-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR939303A true FR939303A (fr) | 1948-11-09 |
Family
ID=10247697
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR939303D Expired FR939303A (fr) | 1940-11-29 | 1946-08-29 | Perfectionnements aux dispositifs électro-magnétiques |
Country Status (4)
Country | Link |
---|---|
US (1) | US2360796A (fr) |
BE (1) | BE479953A (fr) |
CH (1) | CH266931A (fr) |
FR (1) | FR939303A (fr) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2485278A (en) * | 1945-03-31 | 1949-10-18 | Permoflux Corp | Hand microphone and switch |
US2493734A (en) * | 1945-05-23 | 1950-01-03 | Sonotone Corp | Magnetic insert earphone insertable in the ear of the user |
US2523775A (en) * | 1946-05-17 | 1950-09-26 | Wheeler Insulated Wire Company | Electromagnetic transducer |
BE476263A (fr) * | 1946-06-21 | |||
BE473856A (fr) * | 1946-10-19 | |||
US3060282A (en) * | 1957-07-26 | 1962-10-23 | Baldwin Piano Co | Electroacoustic transducer |
US3066200A (en) * | 1958-08-11 | 1962-11-27 | William Ward Jackson | Speaker device |
NL259873A (fr) * | 1960-05-05 | |||
DE1155486B (de) * | 1961-03-08 | 1963-10-10 | Arnstadt Fernmeldewerk | Ringfoermiges oder rechteckfoermiges, in bezug auf den Anker symmetrisches Magnetsystem fuer elektroakustische Wandler |
KR20180079856A (ko) * | 2017-01-03 | 2018-07-11 | 유수진 | 브리지 에지 방식의 고해상 전자기 스피커 |
-
0
- BE BE479953D patent/BE479953A/xx unknown
-
1942
- 1942-05-12 US US442655A patent/US2360796A/en not_active Expired - Lifetime
-
1946
- 1946-06-28 CH CH266931D patent/CH266931A/de unknown
- 1946-08-29 FR FR939303D patent/FR939303A/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2360796A (en) | 1944-10-17 |
CH266931A (de) | 1950-02-28 |
BE479953A (fr) |
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