GB339127A - Improvements in or relating to apparatus for the reproduction of sound having a diaphragm of relatively large surface and a screen plate - Google Patents
Improvements in or relating to apparatus for the reproduction of sound having a diaphragm of relatively large surface and a screen plateInfo
- Publication number
- GB339127A GB339127A GB38658/29A GB3865829A GB339127A GB 339127 A GB339127 A GB 339127A GB 38658/29 A GB38658/29 A GB 38658/29A GB 3865829 A GB3865829 A GB 3865829A GB 339127 A GB339127 A GB 339127A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diaphragm
- sound
- plate
- relatively large
- large surface
- 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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
- H04R1/345—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
339,127. Douw, J. C., Hein, J. W. V., Henny, C. H., and Henny, M. A., (trading as Syndicate J. C. Douw's Patents). July 26, 1929, [Convention date]. Loud - speakers; diaphragms. - In a loudspeaker or like sound reproducing device a diaphragm 7 of relatively large surface area is spaced apart from the front baffle or screen plate 1 by a fixed frustoconical sound channel 2 which at its narrower end is connected to the periphery of the diaphragm 7 and at its outer end to an opening in the plate 1, e.g. by a flange 3 disposed at right-angles to the axis of the diaphragm. A hollow conical body 8 is arranged coaxially with the sound channel 2 and connected thereto by distance-pieces 9. Preferably the body 8 and sound channel 2 are each constructed from a sheet of wood with a layer of flexible material attached thereto, and the body 8 is strengthened at its apex by a shaped block of wood 10. Additional support for the inner end. of the channel 2 is provided by a stiffening plate 4, which is attached at 11 to the frame of the loud-speaker unit 6 and is spaced apart from the front plate 1 by supports 5.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL339127X | 1929-07-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB339127A true GB339127A (en) | 1930-12-04 |
Family
ID=19784637
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB38658/29A Expired GB339127A (en) | 1929-07-26 | 1929-12-17 | Improvements in or relating to apparatus for the reproduction of sound having a diaphragm of relatively large surface and a screen plate |
Country Status (5)
Country | Link |
---|---|
US (1) | US1952539A (en) |
BE (1) | BE366478A (en) |
DE (1) | DE588742C (en) |
FR (1) | FR686786A (en) |
GB (1) | GB339127A (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2567829A (en) * | 1947-03-06 | 1951-09-11 | Suthann Robert Andree | Combined cabinet and chassis for mounting electrical components |
US8631897B2 (en) | 2008-06-27 | 2014-01-21 | Rgb Systems, Inc. | Ceiling loudspeaker system |
DE102008058028A1 (en) * | 2008-11-18 | 2010-05-20 | K+H Vertriebs- Und Entwicklungsgesellschaft Mbh | Speaker unit |
WO2012174159A1 (en) * | 2011-06-14 | 2012-12-20 | Rgb Systems, Inc. | Ceiling loudspeaker system |
US11277684B2 (en) * | 2019-01-17 | 2022-03-15 | Onkyo Corporation | Diffuser |
-
0
- BE BE366478D patent/BE366478A/xx unknown
-
1929
- 1929-12-05 DE DED59859D patent/DE588742C/en not_active Expired
- 1929-12-17 GB GB38658/29A patent/GB339127A/en not_active Expired
- 1929-12-17 FR FR686786D patent/FR686786A/en not_active Expired
- 1929-12-26 US US416662A patent/US1952539A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
BE366478A (en) | |
FR686786A (en) | 1930-07-30 |
US1952539A (en) | 1934-03-27 |
DE588742C (en) | 1933-11-25 |
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