GB237477A - Improvements in or relating to loud speaking telephonic apparatus - Google Patents
Improvements in or relating to loud speaking telephonic apparatusInfo
- Publication number
- GB237477A GB237477A GB2748224A GB2748224A GB237477A GB 237477 A GB237477 A GB 237477A GB 2748224 A GB2748224 A GB 2748224A GB 2748224 A GB2748224 A GB 2748224A GB 237477 A GB237477 A GB 237477A
- Authority
- GB
- United Kingdom
- Prior art keywords
- horn
- base piece
- receiver
- loud
- relating
- 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)
- Invalid Beds And Related Equipment (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
237,477. Graham, E. A. Nov. 17, 1924. Loud-speakers.-Loud-speakers comprising a receiver, a horn, and a base piece are so constructed and arranged that in one position the receiver and horn can be supported by the base piece alone on a table &c. with the horn inclined to the horizontal, and in the other position the base piece and receiver can be caused to bear on the table &c. to maintain the horn in an upright position. The base piece b is provided, in addition to its normal under-surface h, with a surface b<1> cut or formed at right-angles to the axis of the horn c so that the horn is upright when the instrument is placed as shown in Fig. 2. The base piece b may be integral with the receiver casing a or detachable therefrom, and secured to it by a screw g, Fig. 3, and screwed hole a<3>, or by a finger screw fitting a screwed boss on the casing. Specification 247,281 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2748224A GB237477A (en) | 1924-11-17 | 1924-11-17 | Improvements in or relating to loud speaking telephonic apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2748224A GB237477A (en) | 1924-11-17 | 1924-11-17 | Improvements in or relating to loud speaking telephonic apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB237477A true GB237477A (en) | 1925-07-30 |
Family
ID=10260302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2748224A Expired GB237477A (en) | 1924-11-17 | 1924-11-17 | Improvements in or relating to loud speaking telephonic apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB237477A (en) |
-
1924
- 1924-11-17 GB GB2748224A patent/GB237477A/en not_active Expired
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