GB677226A - Improvements in or relating to electro-acoustic transducers - Google Patents
Improvements in or relating to electro-acoustic transducersInfo
- Publication number
- GB677226A GB677226A GB1620447A GB1620447A GB677226A GB 677226 A GB677226 A GB 677226A GB 1620447 A GB1620447 A GB 1620447A GB 1620447 A GB1620447 A GB 1620447A GB 677226 A GB677226 A GB 677226A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diaphragm
- cheek
- june
- electro
- recess
- 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
- 238000013016 damping Methods 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/225—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only for telephonic receivers
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
677,226. Sound reproducing devices. STANDARD TELEPHONES & CABLES, Ltd. June 18, 1948 [June 19, 1947], No. 16204/47. Class 40 (iv). In an electro acoustic transducer in which a space behind the diaphragm is provided to give added acoustic stiffness, the major part of the wall is formed either by the end of the windings of an operating coil or by a cheek of the spool on which the coil is wound. As shown, the upper cheek 4 of a spool surrounding the centre polepiece 3 rests in a recess in a cylindrical permanent magnet 1 and supports a diaphragm 8 on its outer rim. A recess 5 in the cheek 4 forms with the diaphragm a damping cavity, the effect of which can be adjusted by the provision of holes such as 6 covered by woven silk 7. Specifications 481,351 and 677,225 are referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1620447A GB677226A (en) | 1947-06-19 | 1947-06-19 | Improvements in or relating to electro-acoustic transducers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1620447A GB677226A (en) | 1947-06-19 | 1947-06-19 | Improvements in or relating to electro-acoustic transducers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB677226A true GB677226A (en) | 1952-08-13 |
Family
ID=10073043
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1620447A Expired GB677226A (en) | 1947-06-19 | 1947-06-19 | Improvements in or relating to electro-acoustic transducers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB677226A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1115766B (en) * | 1956-06-09 | 1961-10-26 | Schoeps Dr Ing Karl | Sound receiver |
CN105972251A (en) * | 2016-07-14 | 2016-09-28 | 康以宣 | Diaphragm for pneumatic three-way valve and pneumatic three-way valve |
-
1947
- 1947-06-19 GB GB1620447A patent/GB677226A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1115766B (en) * | 1956-06-09 | 1961-10-26 | Schoeps Dr Ing Karl | Sound receiver |
CN105972251A (en) * | 2016-07-14 | 2016-09-28 | 康以宣 | Diaphragm for pneumatic three-way valve and pneumatic three-way valve |
CN105972251B (en) * | 2016-07-14 | 2018-05-18 | 康以宣 | For the diaphragm and Pneumatic three-way valve of Pneumatic three-way valve |
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