GB944811A - Improvements in or relating to electro-acoustic transducers - Google Patents
Improvements in or relating to electro-acoustic transducersInfo
- Publication number
- GB944811A GB944811A GB3222060A GB3222060A GB944811A GB 944811 A GB944811 A GB 944811A GB 3222060 A GB3222060 A GB 3222060A GB 3222060 A GB3222060 A GB 3222060A GB 944811 A GB944811 A GB 944811A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sheet
- polepieces
- cup
- air
- electro
- 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)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
944,811. Transducers. STANDARD TELEPHONES & CABLES Ltd. Sept. 20, 1960, No. 32220/60. Heading H4J. Two polepieces 4, 5 which together define an air gap are secured in position by cement or adhesive to one surface of a sheet 3 of material of thickness 1 to 10 mils. The air gap is annular for reception of a speech coil 6. The assembly forms part of a moving coil microphone, loudspeaker or other transducer. The transducer includes a cup 1 of ferro-magnetic material and a cylindrical permanent magnet 2 of high coercivity material. The space between sheet 3, cup 1 and magnet 2 define an air chamber. A second air chamber is defined by sheet 3, polepieces 4, 5 and a diaphragm 7. The two air chambers are separated by the sheet 3 which is perforated and may be of plastics or metal, e.g. steel. Sheet 3 provides acoustic resistance.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3222060A GB944811A (en) | 1960-09-20 | 1960-09-20 | Improvements in or relating to electro-acoustic transducers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3222060A GB944811A (en) | 1960-09-20 | 1960-09-20 | Improvements in or relating to electro-acoustic transducers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB944811A true GB944811A (en) | 1963-12-18 |
Family
ID=10335185
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3222060A Expired GB944811A (en) | 1960-09-20 | 1960-09-20 | Improvements in or relating to electro-acoustic transducers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB944811A (en) |
-
1960
- 1960-09-20 GB GB3222060A patent/GB944811A/en not_active Expired
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