GB425558A - Improvements relating to telephones - Google Patents
Improvements relating to telephonesInfo
- Publication number
- GB425558A GB425558A GB2973233A GB2973233A GB425558A GB 425558 A GB425558 A GB 425558A GB 2973233 A GB2973233 A GB 2973233A GB 2973233 A GB2973233 A GB 2973233A GB 425558 A GB425558 A GB 425558A
- Authority
- GB
- United Kingdom
- Prior art keywords
- screens
- rings
- loud
- louvres
- horn
- 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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
- H04R1/023—Screens for loudspeakers
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Abstract
425,558. Receivers ; loud-speakers; horns. GRAHAM & CO., Ltd., A., Caxton House, Tothill Street, London, and VAUGHAN, C. H., 20, Cock Mannings Road, St. Mary's Cray, Kent. Oct. 26, 1933, No. 29732. [Class 40 (iv)] [See also Group XXXVIII] In a telephone receiver or loud-speaker particularly for use on ships, a number of screens of wire mesh are arranged one behind the other in front of the diaphragm, and are spaced apart by members provided with drainage apertures. As shown applied to a loud - speaker, one screen 10 is secured between rings 8, 9, which are held in position against a rubber washer 7 by screws 11, and other screens 12, 14 are held in the rings 8, 9 by split-rings. The screens may be of different meshes. The rings 8, 9 are cut away or pierced in register with drainage apertures 16 in the casing. The apertures 16 may be protected by louvres. The sound aperture is formed with slats 6 or louvres The casing comprises a part 1 containing the sound passage and screens, secured to a second part 2 which supports the other components. In a horn-type instrument the screens are at the mouth of the horn.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2973233A GB425558A (en) | 1933-10-26 | 1933-10-26 | Improvements relating to telephones |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2973233A GB425558A (en) | 1933-10-26 | 1933-10-26 | Improvements relating to telephones |
Publications (1)
Publication Number | Publication Date |
---|---|
GB425558A true GB425558A (en) | 1935-03-18 |
Family
ID=10296251
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2973233A Expired GB425558A (en) | 1933-10-26 | 1933-10-26 | Improvements relating to telephones |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB425558A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2423014A (en) * | 1943-05-10 | 1947-06-24 | Permoflux Corp | Pressure-equalizing housing for transducers |
US2521744A (en) * | 1944-08-15 | 1950-09-12 | Int Standard Electric Corp | Moistureproof microphone |
US2556168A (en) * | 1946-10-02 | 1951-06-12 | Int Standard Electric Corp | Microphone waterproofing device |
US2838127A (en) * | 1953-11-04 | 1958-06-10 | Philips Corp | Device for the transmission of sound from rooms having a high noise level |
EP2814262A1 (en) * | 2013-06-14 | 2014-12-17 | Genelec OY | Loudspeaker with a wave guide |
-
1933
- 1933-10-26 GB GB2973233A patent/GB425558A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2423014A (en) * | 1943-05-10 | 1947-06-24 | Permoflux Corp | Pressure-equalizing housing for transducers |
US2521744A (en) * | 1944-08-15 | 1950-09-12 | Int Standard Electric Corp | Moistureproof microphone |
US2556168A (en) * | 1946-10-02 | 1951-06-12 | Int Standard Electric Corp | Microphone waterproofing device |
US2838127A (en) * | 1953-11-04 | 1958-06-10 | Philips Corp | Device for the transmission of sound from rooms having a high noise level |
EP2814262A1 (en) * | 2013-06-14 | 2014-12-17 | Genelec OY | Loudspeaker with a wave guide |
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