GB312979A - Improvements in loud speakers and the like - Google Patents
Improvements in loud speakers and the likeInfo
- Publication number
- GB312979A GB312979A GB1329629A GB1329629A GB312979A GB 312979 A GB312979 A GB 312979A GB 1329629 A GB1329629 A GB 1329629A GB 1329629 A GB1329629 A GB 1329629A GB 312979 A GB312979 A GB 312979A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- valve
- capacity
- coupling
- choke
- 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
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/002—Damping circuit arrangements for transducers, e.g. motional feedback circuits
-
- 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
312,979. Lucas, O. D. Feb. 1, 1928. Divided on 312,950. Circuits for moving-coil instruments. - The coil a, a<1> of a moving-coil loud. speaker is centre tapped and continuous current is passed through it from end to end. As shown the coil is connected in the output of an amplifying-valve 2 through choke-capacity coupling 3, 6, 6<a>, the condenser forming the capacity is divided into two portions connected in common to the plate of the valve and respectively to each end of the coil, and the centre tapping 11 on the coil is connected through a condenser 7 by a lead 9 to the high-tension negative. The, coil is connected across the high-tension supply in parallel with the valve through a variable resistance 5 and low-frequency chokes 4, 4<a>. According to modifications, the choke capacity output coupling is replaced by transformer coupling (Fig. 2, not shown); the transformer has a split secondary (Fig. 3, not shown); two transformers are used (Fig. 4, not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB316528A GB312950A (en) | 1928-02-01 | 1928-02-01 | Improvements in loud speakers and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB312979A true GB312979A (en) | 1929-06-04 |
Family
ID=9753147
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1329629A Expired GB312979A (en) | 1928-02-01 | 1928-02-01 | Improvements in loud speakers and the like |
| GB316528A Expired GB312950A (en) | 1928-02-01 | 1928-02-01 | Improvements in loud speakers and the like |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB316528A Expired GB312950A (en) | 1928-02-01 | 1928-02-01 | Improvements in loud speakers and the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB312979A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3055991A (en) * | 1955-11-30 | 1962-09-25 | Guss Reuben | Loudspeaker |
| US2926221A (en) * | 1957-11-21 | 1960-02-23 | William A Kagdis | Loudspeaker construction |
| DE1815694C2 (en) * | 1968-12-19 | 1971-02-18 | Manger J W | Electrodynamic converter system |
| US4379951A (en) * | 1977-04-20 | 1983-04-12 | Gabr Saad Z M | Electro-acoustic transducer means |
-
1928
- 1928-02-01 GB GB1329629A patent/GB312979A/en not_active Expired
- 1928-02-01 GB GB316528A patent/GB312950A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB312950A (en) | 1929-06-04 |
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