GB273498A - Improvements in and relating to loud-speaking telephonic receivers - Google Patents
Improvements in and relating to loud-speaking telephonic receiversInfo
- Publication number
- GB273498A GB273498A GB1726926A GB1726926A GB273498A GB 273498 A GB273498 A GB 273498A GB 1726926 A GB1726926 A GB 1726926A GB 1726926 A GB1726926 A GB 1726926A GB 273498 A GB273498 A GB 273498A
- Authority
- GB
- United Kingdom
- Prior art keywords
- loud
- relating
- ferranti
- speaking
- telephonic receivers
- 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
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/02—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators
- G10K11/025—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators horns for impedance matching
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Electromechanical Clocks (AREA)
Abstract
273,498. Ferranti, S. Z. de, and Ferranti, Ltd. July 9, 1926. Loud-speakers. - A loud-speaker unit includes a vertically disposed horn a with a conoidal reflector b extending inwardly from the mouth, so that the sound waves are radiated substantially in a horizontal plane, and the area of the annular section f increases exponentially with the axial length. The unit is supported by legs h.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1726926A GB273498A (en) | 1926-07-09 | 1926-07-09 | Improvements in and relating to loud-speaking telephonic receivers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1726926A GB273498A (en) | 1926-07-09 | 1926-07-09 | Improvements in and relating to loud-speaking telephonic receivers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB273498A true GB273498A (en) | 1927-07-07 |
Family
ID=10092218
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1726926A Expired GB273498A (en) | 1926-07-09 | 1926-07-09 | Improvements in and relating to loud-speaking telephonic receivers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB273498A (en) |
-
1926
- 1926-07-09 GB GB1726926A patent/GB273498A/en not_active Expired
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