GB498470A - Improvements in or relating to electro-dynamic loudspeakers - Google Patents
Improvements in or relating to electro-dynamic loudspeakersInfo
- Publication number
- GB498470A GB498470A GB18620/37A GB1862037A GB498470A GB 498470 A GB498470 A GB 498470A GB 18620/37 A GB18620/37 A GB 18620/37A GB 1862037 A GB1862037 A GB 1862037A GB 498470 A GB498470 A GB 498470A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnet
- pot
- field
- windings
- july
- 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
- H04R2209/022—Aspects regarding the stray flux internal or external to the magnetic circuit, e.g. shielding, shape of magnetic circuit, flux compensation coils
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
498,470. Loud-speakers. TELEFUN KEN GES. FUR DRAHTLOSE TELEGRAPHIE. July 5, 1937, No. 18620. Convention date, July 3, 1936. [Class 40 (iv)] Relates to an electrodynamic loud-speaker of the energized type employed in conjunction with a television receiver of the cathode-ray type and in which means are provided to prevent or reduce the stray magnetic field in the region of the magnet. As shown in Fig. 1 the field magnet is E- shaped and windings 12, 13 supplied with direct current are mounted on the outer limbs of the field magnet. In a modification, Fig. 2, the base 14a of the field-magnet is connected to the annular pole-piece (not shown) by a number of separate members 15, 16, 17, 18 each provided with a separate auxiliary winding. In a further modification, Fig. 3, having a pot-shaped magnet, auxiliary concentric windings 19, 20, are provided within and without the wall of the pot. Additional windings may be provided on the inside and outside of the base of the pot and are concentrically arranged with regard to the core carrying the energizing winding of the magnet, Fig. 4 (not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE498470X | 1936-07-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB498470A true GB498470A (en) | 1939-01-05 |
Family
ID=6545307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18620/37A Expired GB498470A (en) | 1936-07-03 | 1937-07-05 | Improvements in or relating to electro-dynamic loudspeakers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB498470A (en) |
-
1937
- 1937-07-05 GB GB18620/37A patent/GB498470A/en not_active Expired
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