GB1131398A - Improvements in or relating to electrodynamic transducers - Google Patents
Improvements in or relating to electrodynamic transducersInfo
- Publication number
- GB1131398A GB1131398A GB700466A GB700466A GB1131398A GB 1131398 A GB1131398 A GB 1131398A GB 700466 A GB700466 A GB 700466A GB 700466 A GB700466 A GB 700466A GB 1131398 A GB1131398 A GB 1131398A
- Authority
- GB
- United Kingdom
- Prior art keywords
- iron
- disc
- ring
- coil
- feb
- 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)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
1,131,398. Electrodynamic transducers. P. MAUZ. 17 Feb., 1966 [17 Feb., 1965], No. 7004/66. Heading H4J. An electrodynamic transducer, e.g. a loudspeaker, comprises a pot-shaped magnet structure having a cylindrical air gap in which is a moving coil 5 connected to a membrane 8. The poles 6, 7 on either side of the gap comprise a plurality of annular discs or rings made of metal and stacked upon one another or otherwise disposed adjacent one another, in the direction of movement of the coil, so that each disc or ring lies in a plane transverse to the direction of movement of the coil. The discs or rings may be of iron, either preformed as segments or formed in situ in grooves in the magnetic structure, e.g. from iron paste. The magnet structure comprises an iron disc 1, a sintered magnetic iron ring 2 and an iron pole-ring 3. A core 4 is attached to the disc 1 by a screw-thread or by adhesion. Parts 1, 2, 3 may be glued.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1965M0064194 DE1280324B (en) | 1965-02-17 | 1965-02-17 | Dynamic electro-acoustic converter |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1131398A true GB1131398A (en) | 1968-10-23 |
Family
ID=7311040
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB700466A Expired GB1131398A (en) | 1965-02-17 | 1966-02-17 | Improvements in or relating to electrodynamic transducers |
Country Status (3)
Country | Link |
---|---|
CH (1) | CH447284A (en) |
DE (1) | DE1280324B (en) |
GB (1) | GB1131398A (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5234212B2 (en) * | 1971-12-17 | 1977-09-02 | ||
JPS533776Y2 (en) * | 1972-10-14 | 1978-01-31 | ||
US4289937A (en) * | 1978-05-30 | 1981-09-15 | Mitsubishi Denki Kabushiki Kaisha | Speaker with fine grain ferromagnetic material on center pole or ring |
DE3108715A1 (en) * | 1981-03-07 | 1982-09-16 | Magnetfabrik Bonn Gmbh Vorm. Gewerkschaft Windhorst, 5300 Bonn | Annular-gap magnet system for dynamic loudspeakers |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1827114A (en) * | 1928-09-20 | 1931-10-13 | Vesper A Schlenker | Acoustic device |
US1903164A (en) * | 1929-06-15 | 1933-03-28 | Temple Corp | Loud speaker |
DE623800C (en) * | 1930-08-14 | |||
GB409433A (en) * | 1932-11-09 | 1934-05-03 | Henryk Brzeski | Improvements in and relating to loud speakers |
DE844165C (en) * | 1949-07-07 | 1952-07-17 | Wilhelm Petersen | speaker |
-
1965
- 1965-02-17 DE DE1965M0064194 patent/DE1280324B/en not_active Withdrawn
-
1966
- 1966-02-10 CH CH203966A patent/CH447284A/en unknown
- 1966-02-17 GB GB700466A patent/GB1131398A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CH447284A (en) | 1967-11-30 |
DE1280324B (en) | 1968-10-17 |
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