GB324493A - Improvements in or relating to sound reproducing or transmitting instruments - Google Patents
Improvements in or relating to sound reproducing or transmitting instrumentsInfo
- Publication number
- GB324493A GB324493A GB3850928A GB3850928A GB324493A GB 324493 A GB324493 A GB 324493A GB 3850928 A GB3850928 A GB 3850928A GB 3850928 A GB3850928 A GB 3850928A GB 324493 A GB324493 A GB 324493A
- Authority
- GB
- United Kingdom
- Prior art keywords
- flare
- cone
- sound reproducing
- relating
- ridges
- 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
- H04R7/02—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)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Diaphragms And Bellows (AREA)
Abstract
324,493. Brown, S. G. Dec. 31, 1928. Diaphragms.-A sound reproducing or transmitting device has a large diameter, circular, conical diaphragm with a flare or bell-shaped mouth. The flare A may extend over the greater length of the cone, Fig. 1, or may be short, Fig. 4. The flare may be formed from a cone, the excess material being taken up by the ridges a which ridges or creases may be formed by moulding, either with or without cutting along the line a. The diaphragm may also be formed from sections which are joined together by suitable upturned flanges on the sections. The cone is flexibly mounted by material c to a frame D and is actuated axially from its apex.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3850928A GB324493A (en) | 1928-12-31 | 1928-12-31 | Improvements in or relating to sound reproducing or transmitting instruments |
FR686259D FR686259A (en) | 1928-12-31 | 1929-12-07 | Improvements to reproductive instruments and sound transmitters |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3850928A GB324493A (en) | 1928-12-31 | 1928-12-31 | Improvements in or relating to sound reproducing or transmitting instruments |
Publications (1)
Publication Number | Publication Date |
---|---|
GB324493A true GB324493A (en) | 1930-01-30 |
Family
ID=10403934
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3850928A Expired GB324493A (en) | 1928-12-31 | 1928-12-31 | Improvements in or relating to sound reproducing or transmitting instruments |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR686259A (en) |
GB (1) | GB324493A (en) |
-
1928
- 1928-12-31 GB GB3850928A patent/GB324493A/en not_active Expired
-
1929
- 1929-12-07 FR FR686259D patent/FR686259A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR686259A (en) | 1930-07-24 |
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