GB383664A - Improvements relating to coils, particularly for loud speakers - Google Patents
Improvements relating to coils, particularly for loud speakersInfo
- Publication number
- GB383664A GB383664A GB2241031A GB2241031A GB383664A GB 383664 A GB383664 A GB 383664A GB 2241031 A GB2241031 A GB 2241031A GB 2241031 A GB2241031 A GB 2241031A GB 383664 A GB383664 A GB 383664A
- Authority
- GB
- United Kingdom
- Prior art keywords
- strip
- oxide
- coils
- coil
- improvements 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
The speech coil of a moving coil electroacoustic instrument, such as a loud-speaker, is formed of a flat strip conductor wound upon itself in a flat spiral, the width of the strip being parallel to the axis of the resulting coil and adjacent turns being insulated from one another by a thin film of an oxide of the metal of which the conductor is composed. Thus, if the strip is of copper, the insulating film is formed by dipping the strip in nitric acid and subsequently heating it to produce a copper oxide surface, whilst, if it is of aluminium, the oxide can be formed by electrolysis using a solution of silicate of soda as the electrolyte.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2241031A GB383664A (en) | 1931-08-07 | 1931-08-07 | Improvements relating to coils, particularly for loud speakers |
FR732653D FR732653A (en) | 1931-08-07 | 1932-03-04 | Reel refinements, especially loudspeakers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2241031A GB383664A (en) | 1931-08-07 | 1931-08-07 | Improvements relating to coils, particularly for loud speakers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB383664A true GB383664A (en) | 1932-11-24 |
Family
ID=10178914
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2241031A Expired GB383664A (en) | 1931-08-07 | 1931-08-07 | Improvements relating to coils, particularly for loud speakers |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR732653A (en) |
GB (1) | GB383664A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3711659A (en) * | 1971-01-20 | 1973-01-16 | G Bremseth | Loudspeaker voice coils |
US4225756A (en) * | 1973-06-21 | 1980-09-30 | Babbco, Ltd. | Broad band dynamic loudspeaker |
US4317965A (en) * | 1979-04-10 | 1982-03-02 | Kabushiki Kaisha Suwa Seikosha | Thin miniaturized dynamic-type loudspeaker |
GB2125652A (en) * | 1982-06-01 | 1984-03-07 | Harman Int Ind | Loudspeaker voice coil |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3900038A1 (en) * | 1989-01-03 | 1990-07-05 | Nokia Unterhaltungselektronik | SPEAKER VOICE COIL |
-
1931
- 1931-08-07 GB GB2241031A patent/GB383664A/en not_active Expired
-
1932
- 1932-03-04 FR FR732653D patent/FR732653A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3711659A (en) * | 1971-01-20 | 1973-01-16 | G Bremseth | Loudspeaker voice coils |
US4225756A (en) * | 1973-06-21 | 1980-09-30 | Babbco, Ltd. | Broad band dynamic loudspeaker |
US4317965A (en) * | 1979-04-10 | 1982-03-02 | Kabushiki Kaisha Suwa Seikosha | Thin miniaturized dynamic-type loudspeaker |
GB2125652A (en) * | 1982-06-01 | 1984-03-07 | Harman Int Ind | Loudspeaker voice coil |
Also Published As
Publication number | Publication date |
---|---|
FR732653A (en) | 1932-09-23 |
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