GB275571A - Acoustic devices, such as loud speakers - Google Patents
Acoustic devices, such as loud speakersInfo
- Publication number
- GB275571A GB275571A GB15795/27A GB1579527A GB275571A GB 275571 A GB275571 A GB 275571A GB 15795/27 A GB15795/27 A GB 15795/27A GB 1579527 A GB1579527 A GB 1579527A GB 275571 A GB275571 A GB 275571A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diaphragm
- sound
- plug
- passages
- secured
- 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
- 238000006073 displacement reaction Methods 0.000 abstract 2
- 230000002093 peripheral effect Effects 0.000 abstract 2
- 238000004804 winding Methods 0.000 abstract 2
- 239000011358 absorbing material Substances 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 239000004744 fabric Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 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
- 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
- H04R1/30—Combinations of transducers with horns, e.g. with mechanical matching means, i.e. front-loaded horns
-
- 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
- H04R7/127—Non-planar diaphragms or cones dome-shaped
-
- 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
- H04R7/14—Non-planar diaphragms or cones corrugated, pleated or ribbed
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
275,571. Electrical Research Products, Inc., (Assignees of Wente, E. C.). Aug. 4, 1926, [Convention date]. Loud-speakers; magnetic instruments; diaphragms. - An acoustic device, such as a loudspeaker, comprises a sound chamber, a diaphragm therefor and a plug in the chamber, a substantial portion of the diaphragm being stiffened so as to vibrate as a piston and the base of the plug being in close face to face relation with the stiffened portion of the diaphragm but less closely spaced at its periphery near the sound outlet passage. The diaphragm, plug and chamber are preferably so shaped and arranged that converging sound passages are formed leading from the centre of the diaphragm and from its peripheral portion, respectively, to a common sound passage. The cross sectional areas of these converging sound passages increase as the common sound passage is approached and are such that substantially equal volume displacements occur in each of these passages in response to the displacement of the diaphragm. In the construction of loud-speaker shown, a metallic plug 23 in the form of a spherical sector is secured by lugs 24 and screws 25 in a housing 20, which is suitably shaped internally, the radius of the plug being slightly smaller than that of the dish-shaped central portion 17 of the diaphragm. The outer portion of the diaphragm is formed with a corrugated portion 18 and flat portion 19, which is clamped between the housing 20 and the portion 15 of the electromagnetic structure. The converging sound passages from the central and peripheral portions of the diaphragm respectively meet the common sound passage at the throat of the exponentially tapered horn 26. A coil 14 is secured to the periphery of the stiff central portion 17 of the diaphragm by means of a strip 30 of stiffened fabric material or thin light-weight metal. The ends of the coil 14 are positioned along corrugations in the flexible portion 18 of the diaphragm and secured to screws 31, 32 electrically connected to terminals 33, 34. The electromagnet comprises a hollow annular core 10, winding 11 and annular pole pieces 12, 13, the top portion 15 being detachable to permit assembling of the winding 11 on the core structure. The space at the mid-portion of the core 10 is closed at each end by wire gauze members 27, 28 and a sound absorbing material 29. Specification 275,567 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US127023A US1707545A (en) | 1926-08-04 | 1926-08-04 | Acoustic device |
Publications (1)
Publication Number | Publication Date |
---|---|
GB275571A true GB275571A (en) | 1928-07-12 |
Family
ID=22427925
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB15795/27A Expired GB275571A (en) | 1926-08-04 | 1927-06-14 | Acoustic devices, such as loud speakers |
Country Status (6)
Country | Link |
---|---|
US (1) | US1707545A (en) |
BE (1) | BE344484A (en) |
DE (1) | DE540540C (en) |
FR (1) | FR636818A (en) |
GB (1) | GB275571A (en) |
NL (1) | NL22539C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6950530B2 (en) | 2002-01-31 | 2005-09-27 | Martin Audio Limited | Directional loudspeaker unit |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE968466C (en) * | 1952-02-23 | 1958-02-20 | Siemens Ag | Pressure chamber loudspeaker, especially with a dome membrane |
US4157741A (en) * | 1978-08-16 | 1979-06-12 | Goldwater Alan J | Phase plug |
US4310065A (en) * | 1979-05-11 | 1982-01-12 | Chromalloy Electronics Corporation | Radial horn |
US4718517A (en) * | 1986-02-27 | 1988-01-12 | Electro-Voice, Inc. | Loudspeaker and acoustic transformer therefor |
US4882562A (en) * | 1986-03-11 | 1989-11-21 | Turbosound Limited | Adaptor for coupling plural compression drivers to a common horn |
US20060034475A1 (en) * | 2004-08-16 | 2006-02-16 | Geddes Earl R | Compression driver plug |
KR101192910B1 (en) | 2008-08-14 | 2012-10-18 | 하만인터내셔날인더스트리스인코포레이티드 | Phase plug and acoustic lens for direct radiating loudspeaker |
FR2955445B1 (en) | 2010-01-15 | 2013-06-07 | Phl Audio | ELECTRODYNAMIC TRANSDUCER WITH DOME AND INTERNAL SUSPENSION |
FR2955446B1 (en) | 2010-01-15 | 2015-06-05 | Phl Audio | ELECTRODYNAMIC TRANSDUCER WITH DOME AND FLOATING SUSPENSION |
FR2955444B1 (en) | 2010-01-15 | 2012-08-03 | Phl Audio | COAXIAL SPEAKER SYSTEM WITH COMPRESSION CHAMBER |
-
0
- BE BE344484D patent/BE344484A/xx unknown
- NL NL22539D patent/NL22539C/xx active
-
1926
- 1926-08-04 US US127023A patent/US1707545A/en not_active Expired - Lifetime
-
1927
- 1927-06-14 GB GB15795/27A patent/GB275571A/en not_active Expired
- 1927-06-18 DE DEE35832D patent/DE540540C/en not_active Expired
- 1927-06-29 FR FR636818D patent/FR636818A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6950530B2 (en) | 2002-01-31 | 2005-09-27 | Martin Audio Limited | Directional loudspeaker unit |
Also Published As
Publication number | Publication date |
---|---|
DE540540C (en) | 1932-01-09 |
BE344484A (en) | |
NL22539C (en) | |
US1707545A (en) | 1929-04-02 |
FR636818A (en) | 1928-04-17 |
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