GB830281A - Improvements in low frequency loudspeaker - Google Patents
Improvements in low frequency loudspeakerInfo
- Publication number
- GB830281A GB830281A GB1965457A GB1965457A GB830281A GB 830281 A GB830281 A GB 830281A GB 1965457 A GB1965457 A GB 1965457A GB 1965457 A GB1965457 A GB 1965457A GB 830281 A GB830281 A GB 830281A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diaphragm
- stiffness
- loud
- movement
- toggle
- 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
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/16—Mounting or tensioning of diaphragms or cones
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
830,281. Loud-speakers. BROWNSCOMBE, P. J. June 21, 1957, No. 19654/57. Class 40 (4). The stiffness of the air in a loud-speaker cabinet and the stiffness of the diaphragm support are compensated for by a negative stiffness unit. The centre of the diaphragm is connected to a spring-pressed toggle 21 so that any movement of the diaphragm from its mean position causes the toggle to exert a force on the diaphragm proportional to the displacement and in the same direction. Movement of the diaphragm is limited by stops 31, 32. In the event of the pressure inside the casing A varying markedly from atmospheric a switch 41 or 42 is closed to drive an electric pump 33 or 34 to restore the pressure to normal. Minor modifications are described.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1965457A GB830281A (en) | 1957-06-21 | 1957-06-21 | Improvements in low frequency loudspeaker |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1965457A GB830281A (en) | 1957-06-21 | 1957-06-21 | Improvements in low frequency loudspeaker |
Publications (1)
Publication Number | Publication Date |
---|---|
GB830281A true GB830281A (en) | 1960-03-16 |
Family
ID=10132950
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1965457A Expired GB830281A (en) | 1957-06-21 | 1957-06-21 | Improvements in low frequency loudspeaker |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB830281A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2348563A (en) * | 1999-04-01 | 2000-10-04 | B & W Loudspeakers | Snap-acting over-centre springs assist loudspeaker diaphragm motion |
US7664283B2 (en) | 2004-10-18 | 2010-02-16 | Andrea Chiesi | Devices and transducers with cavity resonator to control 3-D characteristics/harmonic frequencies for all sound/sonic waves |
-
1957
- 1957-06-21 GB GB1965457A patent/GB830281A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2348563A (en) * | 1999-04-01 | 2000-10-04 | B & W Loudspeakers | Snap-acting over-centre springs assist loudspeaker diaphragm motion |
GB2348563B (en) * | 1999-04-01 | 2003-07-16 | B & W Loudspeakers | Loudspeaker drive units and loudspeaker systems |
US7664283B2 (en) | 2004-10-18 | 2010-02-16 | Andrea Chiesi | Devices and transducers with cavity resonator to control 3-D characteristics/harmonic frequencies for all sound/sonic waves |
EP2265037A2 (en) | 2004-10-18 | 2010-12-22 | Daniele Ramenzoni | Devices and transducers with cavity resonator to control 3-d characteristics/harmonic frequencies for all sound/sonic waves |
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