GB986390A - An electro-acoustic transducer - Google Patents
An electro-acoustic transducerInfo
- Publication number
- GB986390A GB986390A GB22725/61A GB2272561A GB986390A GB 986390 A GB986390 A GB 986390A GB 22725/61 A GB22725/61 A GB 22725/61A GB 2272561 A GB2272561 A GB 2272561A GB 986390 A GB986390 A GB 986390A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diaphragm
- less
- diaphragms
- glued
- magnets
- 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
- H04R9/06—Loudspeakers
- H04R9/063—Loudspeakers using a plurality of acoustic drivers
-
- 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
- H04R9/047—Construction in which the windings of the moving coil lay in the same plane
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
986,390. Electrodynamic transducers; diaphragms. G. R. POUTOT. June 22, 1961 [June 23, 1960], No. 22725/61. Heading H4J. A rigid diaphragm for a loud-speaker or microphone has, a specific gravity of less than 0À1, one plane side and on its opposite side at least one protrusion which carries a conductive member disposed in a magnetic field. The diaphragm 1a consists of a foamed polystyrene rectangular sheet (specific gravity less than 0À02) of dimensions 120 x 80 x 6 mm. and it has a number of parallel grooves 14 formed in one face thereof. An aluminium wire 2a or ribbon (Fig. 3, not shown) is glued to the projecting ribs 15 so as to form a number of rectangular loops (Fig. 11, not shown). The magnet system comprises a number of sheet-metal laminations 22, 23 of high permeability which are glued to plates 24 of a magnetic ferrite material, the individual " magnets " so formed being retained in a framework 18a, 18b, 25a, 25b. The diaphragm la is positioned and supported above the magnets by flexible strips 12a, 13a of foamed P.V.C. or polyurethane. Stranded leads 16 connect insulated terminals 20a, 20b to the coil (2a). The use of triangular shaped and trapezoidal diaphragms is discussed with reference to Figs. 4, 5 and 8, 10 respectively (not shown) and a number of conventional circular coils are used on a diaphragm described with reference to Figs. 13 and 14. It should be noted that for any free point on the plane side of the diaphragm a cone can be drawn with its vertex at the junction of a protrusion and the main portion of the diaphragm, with its axis at right angles to the plane of the diaphragm and with a vertex angle of less than 100 degrees such that the free point lies within the cone.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR830847A FR1269138A (en) | 1960-06-23 | 1960-06-23 | Improvements to loudspeakers, microphones, and similar electrodynamic devices |
Publications (1)
Publication Number | Publication Date |
---|---|
GB986390A true GB986390A (en) | 1965-03-17 |
Family
ID=8734012
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB22725/61A Expired GB986390A (en) | 1960-06-23 | 1961-06-22 | An electro-acoustic transducer |
Country Status (4)
Country | Link |
---|---|
US (1) | US3171904A (en) |
DE (2) | DE1195356B (en) |
FR (2) | FR1269138A (en) |
GB (1) | GB986390A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2347818A (en) * | 1999-03-10 | 2000-09-13 | Steff Lin | Flat type loud speaker |
ES2376731A1 (en) * | 2010-06-07 | 2012-03-16 | ACÚSTICA BEYMA, S.L. | Speaker of diaphragm folded. (Machine-translation by Google Translate, not legally binding) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1269138A (en) * | 1960-06-23 | 1961-08-11 | Improvements to loudspeakers, microphones, and similar electrodynamic devices | |
SU581598A1 (en) * | 1974-12-17 | 1977-11-25 | Kasatkin Aleksej F | Band loudspeaker |
US4210786A (en) * | 1979-01-24 | 1980-07-01 | Magnepan, Incorporated | Magnetic field structure for planar speaker |
FR2450020A1 (en) * | 1979-02-20 | 1980-09-19 | Soria Jean Yves | Loudspeaker with several electrodynamic driving units - which fit over membrane to apply uniform force to latter |
FR2477821A1 (en) * | 1980-03-06 | 1981-09-11 | 3A Art Acoustique Appliquee Sa | ELECTRODYNAMIC SPEAKER |
FR2477824A1 (en) * | 1980-03-07 | 1981-09-11 | Spiteri Ernest | IMPROVEMENTS IN ELECTRODYNAMIC LOUDSPEAKERS WITH EXPANDED POLYSTYRENE FLAT MEMBRANE |
US4468530A (en) * | 1982-01-25 | 1984-08-28 | Torgeson W Lee | Loudspeaker system |
US4491698A (en) * | 1982-06-17 | 1985-01-01 | David A. Larson | Electro-acoustic transducer with diaphragm and blank therefor |
US4703510A (en) * | 1982-06-17 | 1987-10-27 | Larson David A | Electro-acoustic transducer with diaphragm and blank therefor |
US4536623A (en) * | 1983-06-16 | 1985-08-20 | Larson David A | Electro-acoustic transducer with diaphragm and blank therefor |
US4604792A (en) * | 1984-12-20 | 1986-08-12 | Lff & Associates | Method for making electro-acoustic transducer apparatus |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE447620C (en) * | 1927-08-06 | Siemens & Halske Akt Ges | Electrodynamic telephone | |
DE484339C (en) * | 1929-10-15 | Lorenz Akt Ges C | Electrodynamic telephone, especially for loudspeakers | |
GB160223A (en) * | 1919-11-18 | 1921-03-18 | Adrian Francis Sykes | Improvements in telephonic and like apparatus |
NL15444C (en) * | 1923-06-08 | |||
DE456570C (en) * | 1926-04-02 | 1928-02-21 | Siemens & Halske Akt Ges | Electrodynamic telephone |
CH133508A (en) * | 1927-03-12 | 1929-06-15 | Siemens Ag | Membrane. |
DE500723C (en) * | 1928-11-13 | 1930-06-24 | Siemens & Halske Akt Ges | Electrodynamic telephone with a rust-shaped magnet system |
US1987412A (en) * | 1931-05-12 | 1935-01-08 | Siemens Ag | Acoustic apparatus |
US2297218A (en) * | 1937-04-24 | 1942-09-29 | Hans E Henrich | Loud-speaker |
US2978671A (en) * | 1951-08-11 | 1961-04-04 | Harris Transducer Corp | Electrodynamic transducer |
US2978669A (en) * | 1954-03-08 | 1961-04-04 | Harris Transducer Corp | Underwater electrodynamic acoustic transducer with air-filled composite diaphragm |
FR1169701A (en) * | 1957-03-15 | 1959-01-05 | Ct D Etudes Et De Dev De L Ele | Electromagnetic device, especially for microphones and headphones |
NL236904A (en) * | 1958-03-07 | |||
US3111187A (en) * | 1959-11-23 | 1963-11-19 | H J Leak & Company Ltd | Diaphragm for electro acoustic transducer |
FR1269138A (en) * | 1960-06-23 | 1961-08-11 | Improvements to loudspeakers, microphones, and similar electrodynamic devices |
-
1960
- 1960-06-23 FR FR830847A patent/FR1269138A/en not_active Expired
-
1961
- 1961-06-19 US US117987A patent/US3171904A/en not_active Expired - Lifetime
- 1961-06-22 GB GB22725/61A patent/GB986390A/en not_active Expired
- 1961-06-22 DE DEP27409A patent/DE1195356B/en active Pending
-
1965
- 1965-03-17 FR FR9506A patent/FR87555E/en not_active Expired
-
1966
- 1966-03-16 DE DEG46317A patent/DE1259948B/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2347818A (en) * | 1999-03-10 | 2000-09-13 | Steff Lin | Flat type loud speaker |
ES2376731A1 (en) * | 2010-06-07 | 2012-03-16 | ACÚSTICA BEYMA, S.L. | Speaker of diaphragm folded. (Machine-translation by Google Translate, not legally binding) |
Also Published As
Publication number | Publication date |
---|---|
DE1259948B (en) | 1968-02-01 |
DE1195356B (en) | 1965-06-24 |
US3171904A (en) | 1965-03-02 |
FR1269138A (en) | 1961-08-11 |
FR87555E (en) | 1966-01-07 |
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