GB476753A - Improvements relating to loud speakers - Google Patents
Improvements relating to loud speakersInfo
- Publication number
- GB476753A GB476753A GB1787736A GB1787736A GB476753A GB 476753 A GB476753 A GB 476753A GB 1787736 A GB1787736 A GB 1787736A GB 1787736 A GB1787736 A GB 1787736A GB 476753 A GB476753 A GB 476753A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- coils
- series
- gap
- cores
- 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
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
- H04R3/08—Circuits for transducers, loudspeakers or microphones for correcting frequency response of electromagnetic transducers
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
476,753. Loud-speakers. COLE, Ltd., E. K., and FALKUS, A. E. June 27, 1936, No. 17877. [Class 40 (iv)] [Also in Group XL] A mains-energized field-magnet system for a loud-speaker comprises two coils adapted to produce flux in a single gap, one coil being in series with the valve anode circuits of the amplifier or radio receiver and the second coil being connected in parallel with the first coil, the coils having two magnetic cores mounted between two plates of magnetic material, one of the cores providing with one of the plates a gap in which the moving coil of the loudspeaker operates and the disposition of the coils being such that there is insufficient coupling between them to reduce substantially the impedance of the series coil to alternating current. In the circuit arrangement of Fig. 1, alternating current is supplied to rectifiers 2, the cathode of which is connected through a coil 3 to the anode circuit 4 of the receiver. The second coil 5 is connected across the anode circuit 4 and in parallel with the coil 3. Fig. 2 shows a magnet system comprising cores 6, 7 and poleplates 8, 9 in which the coil 5 surrounds the core 6 which forms the gap 10 for the moving coil, whilst the series-connected coil 3 is mounted on the core 7. The field coils 3, 5 may be similar or the resistance of the coil 5 may be high compared with that of the coil 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1787736A GB476753A (en) | 1936-06-27 | 1936-06-27 | Improvements relating to loud speakers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1787736A GB476753A (en) | 1936-06-27 | 1936-06-27 | Improvements relating to loud speakers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB476753A true GB476753A (en) | 1937-12-15 |
Family
ID=10102777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1787736A Expired GB476753A (en) | 1936-06-27 | 1936-06-27 | Improvements relating to loud speakers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB476753A (en) |
-
1936
- 1936-06-27 GB GB1787736A patent/GB476753A/en not_active Expired
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