GB371433A - Improvements relating to loud-speakers and like sound reproducing apparatus - Google Patents
Improvements relating to loud-speakers and like sound reproducing apparatusInfo
- Publication number
- GB371433A GB371433A GB183531A GB183531A GB371433A GB 371433 A GB371433 A GB 371433A GB 183531 A GB183531 A GB 183531A GB 183531 A GB183531 A GB 183531A GB 371433 A GB371433 A GB 371433A
- Authority
- GB
- United Kingdom
- Prior art keywords
- loud
- diaphragm
- casing
- end wall
- speakers
- 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
- 229910001369 Brass Inorganic materials 0.000 abstract 2
- 239000010951 brass Substances 0.000 abstract 2
- 239000002184 metal Substances 0.000 abstract 1
- 239000011120 plywood 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
- H04R1/2811—Enclosures comprising vibrating or resonating arrangements for loudspeaker transducers
-
- 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
- H04R1/2838—Enclosures comprising vibrating or resonating arrangements of the bandpass type
- H04R1/2842—Enclosures comprising vibrating or resonating arrangements of the bandpass type for loudspeaker transducers
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Abstract
371,433. Loud-speakers. BRAGGINS, G. D. M., 91, Bloxham Road, Banbury, Oxfordshire. Jan. 20, 1931, No. 1835. [Class 40 (iv).] A loud - speaker comprises a conical diaphragm a<1>, as shown in the Figure, enclosed within a shallow unobstructed cylindrical casing h, having apertures m in its periphery and a central aperture k in one end wall, the chassis d being secured to the end wall round the aperture k and not in contact with the casing at any other point. According to another aspect of the invention, the conical diaphragm a<1> is enclosed within the cylindrical casing h, secured round the opening k to the chassis d, the apex of the diaphragm extending through an aperture in the rear end wall. Further apertures l may be provided in the front wall of the casing which is preferably of plywood. The rear wall may comprise two or more pieces, not in contact with each other and independently secured to the periphery g, so as to respond to different frequencies, Figs. 3, 4 (not shown). A disc q of brass or other metal may be adjustably mounted in front of the diaphragm a<1> and is stated to improve the reproduction of brass instruments. The loudspeaker may be wholly contained within the cylindrical casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB183531A GB371433A (en) | 1931-01-20 | 1931-01-20 | Improvements relating to loud-speakers and like sound reproducing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB183531A GB371433A (en) | 1931-01-20 | 1931-01-20 | Improvements relating to loud-speakers and like sound reproducing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB371433A true GB371433A (en) | 1932-04-20 |
Family
ID=9728827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB183531A Expired GB371433A (en) | 1931-01-20 | 1931-01-20 | Improvements relating to loud-speakers and like sound reproducing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB371433A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2979150A (en) * | 1958-10-21 | 1961-04-11 | Jr Jesse C Irby | High fidelity loud speaker cabinet |
| US3239028A (en) * | 1963-11-01 | 1966-03-08 | Willard A Murray | Sound reproduction system |
-
1931
- 1931-01-20 GB GB183531A patent/GB371433A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2979150A (en) * | 1958-10-21 | 1961-04-11 | Jr Jesse C Irby | High fidelity loud speaker cabinet |
| US3239028A (en) * | 1963-11-01 | 1966-03-08 | Willard A Murray | Sound reproduction system |
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