GB722270A - Improvements in or relating to loudspeakers having a conical diaphragm - Google Patents
Improvements in or relating to loudspeakers having a conical diaphragmInfo
- Publication number
- GB722270A GB722270A GB28558/51A GB2855851A GB722270A GB 722270 A GB722270 A GB 722270A GB 28558/51 A GB28558/51 A GB 28558/51A GB 2855851 A GB2855851 A GB 2855851A GB 722270 A GB722270 A GB 722270A
- Authority
- GB
- United Kingdom
- Prior art keywords
- louvres
- diaphragm
- loud
- sectors
- speaker
- 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
- 239000002184 metal Substances 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
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
- H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
722,270. Loud-speakers. GENERAL ELECTRIC CO., Ltd., and BRITTAIN, F. H. Nov. 25, 1952 [Dec. 5, 1951], No. 28558/51. Class 40 (4). In a conical diaphragm for a loud-speaker, the resonant frequencies in the fundamental mode of some sectors is made to differ from that of others of the sectors by the forming of three louvres asymmetrically around the axis in the outer half of the diaphragm. The louvres 5, 6, 7, Fig. 3, are formed by making incisions in the diaphragm along a circle concentric with the outer edge and pushing inwardly the parts nearest the apex to form a pointed arch in which the curvature of each half arch are in opposite directions. The effects of such louvres on the performance of a loud-speaker are described with reference to Figs. 1 and 1b (not shown), and an embodiment, Fig. 2 (not shown), includes a rigid plug disposed within the cone of the diaphragm in accordance with the invention described in Specification 722,263. Dimensions of louvres suitable for improving the response of a 6-inch metal cone are included.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US2732908D US2732908A (en) | 1951-12-05 | brittain | |
NL90604D NL90604C (en) | 1951-12-05 | ||
GB28558/51A GB722270A (en) | 1951-12-05 | 1951-12-05 | Improvements in or relating to loudspeakers having a conical diaphragm |
FR1067372D FR1067372A (en) | 1951-12-05 | 1952-12-02 | Loud speaker |
DEG10394A DE940996C (en) | 1951-12-05 | 1952-12-03 | Loudspeaker with cone membrane |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB28558/51A GB722270A (en) | 1951-12-05 | 1951-12-05 | Improvements in or relating to loudspeakers having a conical diaphragm |
Publications (1)
Publication Number | Publication Date |
---|---|
GB722270A true GB722270A (en) | 1955-01-19 |
Family
ID=10277516
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB28558/51A Expired GB722270A (en) | 1951-12-05 | 1951-12-05 | Improvements in or relating to loudspeakers having a conical diaphragm |
Country Status (5)
Country | Link |
---|---|
US (1) | US2732908A (en) |
DE (1) | DE940996C (en) |
FR (1) | FR1067372A (en) |
GB (1) | GB722270A (en) |
NL (1) | NL90604C (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE559436A (en) * | 1956-07-24 | |||
DE1288146B (en) * | 1962-10-31 | 1969-01-30 | Siemens Ag | Electroacoustic converter |
US3742493A (en) * | 1971-12-06 | 1973-06-26 | Edwards Co | Audible signal apparatus |
CN102118672A (en) * | 2011-03-28 | 2011-07-06 | 苏州上声电子有限公司 | Speaker vibrating diaphragm and speaker |
US10194245B1 (en) | 2017-07-28 | 2019-01-29 | Bose Corporation | Acoustic transducer with vibration damping |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1298290A (en) * | 1916-05-02 | 1919-03-25 | Thomas Chalmers | Diaphragm for talking-machines. |
US2124597A (en) * | 1934-01-31 | 1938-07-26 | Rca Corp | Acoustic device |
US1743767A (en) * | 1927-04-13 | 1930-01-14 | Focht Nevin Seasholtz | Sound-reproducing diaphragm |
US1917309A (en) * | 1931-04-10 | 1933-07-11 | Siemens Ag | Diaphragm for acoustic apparatus |
DE592373C (en) * | 1931-04-10 | 1934-02-08 | Telefunken Gmbh | Large surface membrane, which is divided into zones with different natural frequencies by covered recesses between the center and the edge |
US1916223A (en) * | 1932-02-12 | 1933-07-04 | Bell Telephone Labor Inc | Sound translating device |
US1990409A (en) * | 1932-02-19 | 1935-02-05 | Neville Athol Ernest | Acoustical diaphragm |
US2022060A (en) * | 1934-08-29 | 1935-11-26 | Bell Telephone Labor Inc | Acoustic device |
US2115924A (en) * | 1935-10-05 | 1938-05-03 | Magnavox Co | Acoustic apparatus |
US2531634A (en) * | 1945-01-11 | 1950-11-28 | Athol E N Lawrance | Acoustical diaphragm with stiffening means |
FR928176A (en) * | 1946-05-15 | 1947-11-20 | Diaphragm for dynamic loudspeakers | |
NL73443C (en) * | 1949-03-31 |
-
0
- NL NL90604D patent/NL90604C/xx active
- US US2732908D patent/US2732908A/en not_active Expired - Lifetime
-
1951
- 1951-12-05 GB GB28558/51A patent/GB722270A/en not_active Expired
-
1952
- 1952-12-02 FR FR1067372D patent/FR1067372A/en not_active Expired
- 1952-12-03 DE DEG10394A patent/DE940996C/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR1067372A (en) | 1954-06-15 |
NL90604C (en) | |
US2732908A (en) | 1956-01-31 |
DE940996C (en) | 1956-03-29 |
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