GB408284A - Improvements in moving coil loud speakers - Google Patents
Improvements in moving coil loud speakersInfo
- Publication number
- GB408284A GB408284A GB2731432A GB2731432A GB408284A GB 408284 A GB408284 A GB 408284A GB 2731432 A GB2731432 A GB 2731432A GB 2731432 A GB2731432 A GB 2731432A GB 408284 A GB408284 A GB 408284A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- secured
- core
- loud
- coils
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
- Electromagnets (AREA)
Abstract
408,284. Loud - speakers. CARLING, F. R., 116, Regents Park Road, London. Oct. 1, 1932, No. 27314. [Class 40 (iv).] A moving coil loud-speaker comprises a pair of series-connected oppositely wound moving coils 14, 15 each located in a separate air gap 9, 10 of a permanent or electromagnet, the arrangement being such that the inductanceresistance ratio of the speech coil system is reduced to a minimum. As shown, the magnet system comprises a central laminated core 1 secured by a bolt 2 to a non-magnetic frame 3 attached to pole pieces 4, 5 in the form of bars connected together by distance pieces 6 and enclosing an energizing coil 8. The sense of the polarizing fields in the gaps 9, 10 are arranged in opposition. The core 1 is preferably formed by placing a number of strips side by side, the two outer strips being appreciably thicker than the inner ones, to form a bar out of which the finished circular core is turned. The coil cylinder 12 may be supported at each end by a resilient washer, the rear one being shown at 16, and the leads to the coils 14, 15 may be secured to these washers or the lead to coil 14 may be secured to the cone 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2731432A GB408284A (en) | 1932-10-01 | 1932-10-01 | Improvements in moving coil loud speakers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2731432A GB408284A (en) | 1932-10-01 | 1932-10-01 | Improvements in moving coil loud speakers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB408284A true GB408284A (en) | 1934-04-03 |
Family
ID=10257557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2731432A Expired GB408284A (en) | 1932-10-01 | 1932-10-01 | Improvements in moving coil loud speakers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB408284A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3679844A (en) * | 1970-08-27 | 1972-07-25 | Alpha Products Inc | Moving coil loudspeaker using thin magnet |
| US4584438A (en) * | 1980-07-07 | 1986-04-22 | Erl Koenig | Percussion air motor |
| GB2318019A (en) * | 1994-07-20 | 1998-04-08 | Shaw Ind Ltd | Geophone shock absorber |
-
1932
- 1932-10-01 GB GB2731432A patent/GB408284A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3679844A (en) * | 1970-08-27 | 1972-07-25 | Alpha Products Inc | Moving coil loudspeaker using thin magnet |
| US4584438A (en) * | 1980-07-07 | 1986-04-22 | Erl Koenig | Percussion air motor |
| GB2318019A (en) * | 1994-07-20 | 1998-04-08 | Shaw Ind Ltd | Geophone shock absorber |
| GB2318019B (en) * | 1994-07-20 | 1998-09-09 | Shaw Ind Ltd | Geophone shock absorber |
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