GB367119A - Improvements in loud-speakers - Google Patents
Improvements in loud-speakersInfo
- Publication number
- GB367119A GB367119A GB1203/31A GB120331A GB367119A GB 367119 A GB367119 A GB 367119A GB 1203/31 A GB1203/31 A GB 1203/31A GB 120331 A GB120331 A GB 120331A GB 367119 A GB367119 A GB 367119A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diaphragm
- loud
- driven
- speaker
- centre
- 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
- 239000012530 fluid Substances 0.000 abstract 1
- 239000000463 material 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
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
- H04R1/2807—Enclosures comprising vibrating or resonating arrangements
- H04R1/283—Enclosures comprising vibrating or resonating arrangements using a passive diaphragm
- H04R1/2834—Enclosures comprising vibrating or resonating arrangements using a passive diaphragm for loudspeaker transducers
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
367,119. Loud-speakers. BETHENOD, J., 79, Boulevard Haussmann, Paris. Jan. 13, 1931, No. 1203. Convention date, Feb. 5, 1930. [Class 40 (iv).] A loud-speaker has a diaphragm 2, driven e.g. by a moving coil 1, forming one wall of a space closed by a second diaphragm 10 which is flexibly mounted and has such a mass that it vibrates out of phase with the driven diaphragm 1. There may be more than one driven diaphragm 2, each associated with a separate subsidiary diaphragm 10. The body of the loud-speaker may be covered with a non-resonant material 11 and the enclosed space may be filled with an elastic fluid. The diaphragms may be truncated cones or formed of layers of paper glued together, the thickness of the diaphragm increasing from the periphery to the centre. The mass of the diaphragm 10 may be increased by securing heavy washers at its centre.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR705658T | 1930-02-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB367119A true GB367119A (en) | 1932-02-18 |
Family
ID=9067301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1203/31A Expired GB367119A (en) | 1930-02-05 | 1931-01-13 | Improvements in loud-speakers |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR705658A (en) |
| GB (1) | GB367119A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2498825A (en) * | 1943-09-15 | 1950-02-28 | Hartford Nat Bank & Trust Comp | Moving coil transducer and enclosure |
| DE1074651B (en) * | 1956-03-08 | 1960-02-04 | Deutsche Post Betnebslaboratorium fur Rundfunk und Fernsehen Ber Im Adlershof | Arrangement to achieve the expansion of the frequency range in the direction of the lower Frc frequencies in acoustic radiators |
-
1930
- 1930-02-05 FR FR705658D patent/FR705658A/en not_active Expired
-
1931
- 1931-01-13 GB GB1203/31A patent/GB367119A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2498825A (en) * | 1943-09-15 | 1950-02-28 | Hartford Nat Bank & Trust Comp | Moving coil transducer and enclosure |
| DE1074651B (en) * | 1956-03-08 | 1960-02-04 | Deutsche Post Betnebslaboratorium fur Rundfunk und Fernsehen Ber Im Adlershof | Arrangement to achieve the expansion of the frequency range in the direction of the lower Frc frequencies in acoustic radiators |
Also Published As
| Publication number | Publication date |
|---|---|
| FR705658A (en) | 1931-06-11 |
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