FR749472A - Loud speaker - Google Patents
Loud speakerInfo
- Publication number
- FR749472A FR749472A FR749472DA FR749472A FR 749472 A FR749472 A FR 749472A FR 749472D A FR749472D A FR 749472DA FR 749472 A FR749472 A FR 749472A
- Authority
- FR
- France
- Prior art keywords
- loud speaker
- loud
- speaker
- 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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/025—Magnetic circuit
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
- H04R2209/021—Reduction of eddy currents in the magnetic circuit of electrodynamic loudspeaker transducer
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1976874X | 1932-11-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR749472A true FR749472A (en) | 1933-07-24 |
Family
ID=7853775
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR749472D Expired FR749472A (en) | 1932-11-09 | 1933-01-24 | Loud speaker |
Country Status (3)
Country | Link |
---|---|
US (1) | US1976874A (en) |
FR (1) | FR749472A (en) |
GB (1) | GB409433A (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2538164A (en) * | 1946-07-08 | 1951-01-16 | Pickering Associates Inc | Electromagnetic sound reproducer |
US2547565A (en) * | 1946-09-26 | 1951-04-03 | Wright Zimmerman Inc | Speaker having a tubular pot |
GB625591A (en) * | 1947-03-04 | 1949-06-30 | Paul Gustavus Adolphus Helmuth | Improvements in magnets |
US2538691A (en) * | 1948-07-19 | 1951-01-16 | Richard K Y Kim | Voice coil for radio loud-speakers |
US2745083A (en) * | 1949-07-07 | 1956-05-08 | Benjamin L Snavely | Transducer, elements therefor, and methods of assembly thereof |
DE1280324B (en) * | 1965-02-17 | 1968-10-17 | Paul Mauz | Dynamic electro-acoustic converter |
US3632904A (en) * | 1970-03-24 | 1972-01-04 | Paul Mauz | Moving coil loudspeaker with eddy current suppression |
JPS5023613B1 (en) * | 1970-04-23 | 1975-08-08 | ||
JPS5234212B2 (en) * | 1971-12-17 | 1977-09-02 | ||
JPS5235294B2 (en) * | 1971-12-17 | 1977-09-08 | ||
GB2137047A (en) * | 1983-03-15 | 1984-09-26 | Donald Maynard Chave | Moving coil loudspeakers |
WO1994016536A1 (en) * | 1993-01-06 | 1994-07-21 | Velodyne Acoustics, Inc. | Speaker containing dual coil |
AU679967B2 (en) * | 1993-02-08 | 1997-07-17 | Aura Systems, Inc. | Double ended field coil actuator |
US5487114A (en) * | 1994-02-02 | 1996-01-23 | Dinh; Khanh | Magnetless speaker |
-
1932
- 1932-11-25 GB GB33455/32A patent/GB409433A/en not_active Expired
- 1932-12-12 US US646915A patent/US1976874A/en not_active Expired - Lifetime
-
1933
- 1933-01-24 FR FR749472D patent/FR749472A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US1976874A (en) | 1934-10-16 |
GB409433A (en) | 1934-05-03 |
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