GB597935A - Improvements in or relating to moving coil loud speakers and other electrical devices having a member movable in a magnetic gap - Google Patents
Improvements in or relating to moving coil loud speakers and other electrical devices having a member movable in a magnetic gapInfo
- Publication number
- GB597935A GB597935A GB2265444A GB2265444A GB597935A GB 597935 A GB597935 A GB 597935A GB 2265444 A GB2265444 A GB 2265444A GB 2265444 A GB2265444 A GB 2265444A GB 597935 A GB597935 A GB 597935A
- Authority
- GB
- United Kingdom
- Prior art keywords
- holder
- polepiece
- magnetic
- coil
- gap
- 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
- 239000000696 magnetic material Substances 0.000 abstract 3
- 230000005540 biological transmission Effects 0.000 abstract 1
- 230000000875 corresponding Effects 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000006011 modification reaction Methods 0.000 abstract 1
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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
-
- 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
Abstract
597,935. Microphones; loud-speakers. FOUNTAIN, Ltd., G. R., HOULGATE, H. J., and WHEELER, G. C. Nov. 16, 1944, No. 22654. [Class 40 (iv)] Electromagnetic apparatus having an annular coil movable in an annular magnetic gap formed between two concentric polepieces, comprises a coil-supporting holder which is detachable from the magnetic structure and is formed with portions of magnetic material fitting within the gap and engaging at least one of the pole faces of the magnetic structure to locate the holder with respect to the magnetic gap and means for supporting the coil from the holder with the coil located with respect to the portions of the holder which fit within the magnetic gap. As shown in Fig. 1, the diaphragm 3 having a flexible portion 3a and carrying the coil 1 is mounted between discs 4a held in a cup-shaped holder 4 having a flange 6 of magnetic material engaging the inner surface of the outer polepiece 7. A ring 9 secured to the polepiece 7 centralises the polepiece 8 within the gap. In a modification, Fig. 2, the cup-shaped member 4 is provided with a cap 10 fitting the centre polepiece 8, the flange 6 and the cap 10 being connected by an annular member 9 of non-magnetic material. The flange(s) of the holder may be discontinuous and comprise sections shaped to fit corresponding slots in the pole-face(s) of the magnetic gap. The polepiece 8 and the cap 10, Fig. 2, may be formed with an aperture for transmission of the sound from the diaphragm 3. If a cone diaphragm is employed the holder may be formed with struts to support the outer periphery of the diaphragm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE464969D BE464969A (en) | 1944-11-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB597935A true GB597935A (en) | 1948-02-06 |
Family
ID=1737100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2265444A Expired GB597935A (en) | 1944-11-16 | 1944-11-16 | Improvements in or relating to moving coil loud speakers and other electrical devices having a member movable in a magnetic gap |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB597935A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2984712A (en) * | 1959-08-24 | 1961-05-16 | Gen Electric | Loudspeaker construction |
| US3006430A (en) * | 1959-09-23 | 1961-10-31 | Gen Electric | Loudspeaker construction |
-
1944
- 1944-11-16 GB GB2265444A patent/GB597935A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2984712A (en) * | 1959-08-24 | 1961-05-16 | Gen Electric | Loudspeaker construction |
| US3006430A (en) * | 1959-09-23 | 1961-10-31 | Gen Electric | Loudspeaker construction |
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