GB674875A - Improvements in permanent magnet assemblies for moving coil loudspeakers, microphones and other instruments - Google Patents
Improvements in permanent magnet assemblies for moving coil loudspeakers, microphones and other instrumentsInfo
- Publication number
- GB674875A GB674875A GB403649A GB403649A GB674875A GB 674875 A GB674875 A GB 674875A GB 403649 A GB403649 A GB 403649A GB 403649 A GB403649 A GB 403649A GB 674875 A GB674875 A GB 674875A
- Authority
- GB
- United Kingdom
- Prior art keywords
- permanent magnet
- microphones
- instruments
- moving coil
- magnet assemblies
- 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
Landscapes
- Physics & Mathematics (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)
Abstract
674,875. Magnets. ROLA CELESTION, Ltd. May 15, 1950 [Feb. 14, 1949], No. 4036/49. Class 35. A permanent magnet structure, e.g. for loud - speakers, comprises a cylindrical permanent magnet 1, a cup-shaped iron yoke 3 closed at its mouth by a plate 4 having a gap 8 for the coil and a washer 9 which rests against a sleeve 11 of non-magnetic material so as to constrain the magnet 1 against axial movement. The sleeve 11 may be formed by wrapping the magnet 1 with an adhesive tape, or it may be of rubber or brass or plastics. Specification 456,154 is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB403649A GB674875A (en) | 1949-02-14 | 1949-02-14 | Improvements in permanent magnet assemblies for moving coil loudspeakers, microphones and other instruments |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB403649A GB674875A (en) | 1949-02-14 | 1949-02-14 | Improvements in permanent magnet assemblies for moving coil loudspeakers, microphones and other instruments |
Publications (1)
Publication Number | Publication Date |
---|---|
GB674875A true GB674875A (en) | 1952-07-02 |
Family
ID=9769529
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB403649A Expired GB674875A (en) | 1949-02-14 | 1949-02-14 | Improvements in permanent magnet assemblies for moving coil loudspeakers, microphones and other instruments |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB674875A (en) |
-
1949
- 1949-02-14 GB GB403649A patent/GB674875A/en not_active Expired
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