GB398488A - Improvements in or relating to loud speakers of the moving coil type - Google Patents
Improvements in or relating to loud speakers of the moving coil typeInfo
- Publication number
- GB398488A GB398488A GB678132A GB678132A GB398488A GB 398488 A GB398488 A GB 398488A GB 678132 A GB678132 A GB 678132A GB 678132 A GB678132 A GB 678132A GB 398488 A GB398488 A GB 398488A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cone
- support
- coil
- moving coil
- relating
- 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
- H04R9/04—Construction, mounting, or centering of coil
- H04R9/046—Construction
Abstract
398,488. Loud-speakers. PYE RADIO, Ltd., Radio Works, and ROBINSON, T. A. W., Woodlands, Long Road, both in Cambridge. March 7, 1932, No. 6781. [Class 40 (iv).] The moving coil has its turns cemented together so as to form a self-supporting unit 4 which is secured edge to edge to a cylindrical support 3 at the inner end of the cone 1. The coil-centring means may be moulded integrally with the support 3, Figs. 3 and 4 (not shown), or with the cone, Figs. 5 and 6 (not shown), or the support 3 may be moulded integrally with the cone, Figs. 7 and 8 (not shown). Axial flexibility of the centring means may be provided by circumferential corrugations in place of slots. The cone may be formed with radial and circumferential ribs. The cone and centring device or the cone and cylindrical support may be pressed from a sheet of cellulose material. The coil may be formed of wire of rectangular section. Reference has been directed by the Comptroller to Specification 383,664.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB678132A GB398488A (en) | 1932-03-07 | 1932-03-07 | Improvements in or relating to loud speakers of the moving coil type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB678132A GB398488A (en) | 1932-03-07 | 1932-03-07 | Improvements in or relating to loud speakers of the moving coil type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB398488A true GB398488A (en) | 1933-09-07 |
Family
ID=9820615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB678132A Expired GB398488A (en) | 1932-03-07 | 1932-03-07 | Improvements in or relating to loud speakers of the moving coil type |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB398488A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4225756A (en) * | 1973-06-21 | 1980-09-30 | Babbco, Ltd. | Broad band dynamic loudspeaker |
| US4323737A (en) * | 1979-06-30 | 1982-04-06 | Pioneer Electronic Corporation | Driver unit for planar diaphragm type loudspeaker |
| GB2125652A (en) * | 1982-06-01 | 1984-03-07 | Harman Int Ind | Loudspeaker voice coil |
| EP1936181A1 (en) * | 2006-12-12 | 2008-06-25 | MAGNETI MARELLI POWERTRAIN S.p.A. | Electromagnetic fuel injector for a direct injection internal combustion engine |
-
1932
- 1932-03-07 GB GB678132A patent/GB398488A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4225756A (en) * | 1973-06-21 | 1980-09-30 | Babbco, Ltd. | Broad band dynamic loudspeaker |
| US4323737A (en) * | 1979-06-30 | 1982-04-06 | Pioneer Electronic Corporation | Driver unit for planar diaphragm type loudspeaker |
| GB2125652A (en) * | 1982-06-01 | 1984-03-07 | Harman Int Ind | Loudspeaker voice coil |
| EP1936181A1 (en) * | 2006-12-12 | 2008-06-25 | MAGNETI MARELLI POWERTRAIN S.p.A. | Electromagnetic fuel injector for a direct injection internal combustion engine |
| US7850100B2 (en) | 2006-12-12 | 2010-12-14 | Magneti Marelli Powertrain S.P.A. | Electromagnetic fuel injector for a direct injection internal combustion engine |
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