BE412034A - - Google Patents
Info
- Publication number
- BE412034A BE412034A BE412034DA BE412034A BE 412034 A BE412034 A BE 412034A BE 412034D A BE412034D A BE 412034DA BE 412034 A BE412034 A BE 412034A
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB34967/34A GB448271A (en) | 1934-12-05 | 1934-12-05 | Improvements in and relating to sound reproducing devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE412034A true BE412034A (en) |
Family
ID=10372216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE412034D BE412034A (en) | 1934-12-05 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2164374A (en) |
| BE (1) | BE412034A (en) |
| FR (1) | FR796804A (en) |
| GB (1) | GB448271A (en) |
| NL (1) | NL44190C (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2556816A (en) * | 1946-12-04 | 1951-06-12 | Technicon Cardiograph Corp | Polarized electromagnetic operator with damped coil armature |
| US2645684A (en) * | 1948-06-30 | 1953-07-14 | Rca Corp | Noise discriminating system |
| US2538691A (en) * | 1948-07-19 | 1951-01-16 | Richard K Y Kim | Voice coil for radio loud-speakers |
| US3792394A (en) * | 1971-12-16 | 1974-02-12 | J Bertagni | Voice coil |
| US4201886A (en) * | 1976-12-02 | 1980-05-06 | Tenna Corporation | Plural concentric moving coil speaker with push-pull voltage follower direct coupling |
| US4220832A (en) * | 1976-12-02 | 1980-09-02 | Tenna Corporation | Two-way speaker with transformer-coupled split coil |
| US4297537A (en) * | 1979-07-16 | 1981-10-27 | Babb Burton A | Dynamic loudspeaker |
| GB2118398B (en) * | 1982-04-14 | 1986-04-03 | Boaz Elieli | Moving coil electroacoustic transducers |
| DE69431177T2 (en) * | 1993-09-22 | 2003-05-08 | Sony Corp | A horn speaker system |
| JPH09163492A (en) * | 1995-12-06 | 1997-06-20 | Pioneer Electron Corp | Speaker |
| DE19711592A1 (en) * | 1997-03-20 | 1998-09-24 | Nokia Deutschland Gmbh | Voice coil assembly and method for making it |
| US6904158B1 (en) * | 1998-04-03 | 2005-06-07 | Sony Corporation | Speaker apparatus |
| EP2732639A4 (en) * | 2011-07-12 | 2015-06-10 | Strata Audio LLC | Voice coil former stiffener |
-
0
- NL NL44190D patent/NL44190C/xx active
- BE BE412034D patent/BE412034A/xx unknown
-
1934
- 1934-12-05 GB GB34967/34A patent/GB448271A/en not_active Expired
-
1935
- 1935-10-26 FR FR796804D patent/FR796804A/en not_active Expired
- 1935-11-15 US US49945A patent/US2164374A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| GB448271A (en) | 1936-06-05 |
| US2164374A (en) | 1939-07-04 |
| FR796804A (en) | 1936-04-16 |
| NL44190C (en) |