GB310079A - Improvements relating to sound recording and reproducing means - Google Patents
Improvements relating to sound recording and reproducing meansInfo
- Publication number
- GB310079A GB310079A GB171128A GB171128A GB310079A GB 310079 A GB310079 A GB 310079A GB 171128 A GB171128 A GB 171128A GB 171128 A GB171128 A GB 171128A GB 310079 A GB310079 A GB 310079A
- Authority
- GB
- United Kingdom
- Prior art keywords
- current
- amplifier
- recording
- magnet
- reproducing
- 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
- G10K15/00—Acoustics not otherwise provided for
- G10K15/08—Arrangements for producing a reverberation or echo sound
- G10K15/10—Arrangements for producing a reverberation or echo sound using time-delay networks comprising electromechanical or electro-acoustic devices
Abstract
310,079. Aspden, R. L. Jan. 18, 1928. Simulating echo effect.-In electrical recording and reproducing apparatus of the kind in which stereophonic effects are produced by recording or reproducing identical sounds separated by a short time interval which may be varied as required, the time interval is produced by the introduction into one of the sound current circuits of a lag device comprising a rotating metal disc or a travelling metal band completing the circuit between adjustably spaced magnets forming parts of the circuit. Fig. 1 shows a recording device g actuated by identical sounds from microphones a, b one of which is connected through amplifier c directly with a coil e of the device and the other is connected through an amplifier d to excite a magnet l so as to magnetize a rotating metal disc i, which in its travel below another magnet m produces a current which is led to another coil f of the recording device. Residual magnetism on the disc is removed by a magnet n. In reproducing, a current from a gramophone pick-up or from a wireless receiver is passed through an amplifier and divided, one part passing direct to a loud speaker, and the other through a delay device similar to that shown at i, l, m, Fig. 1, which transmits a delayed current to a second loud speaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB171128A GB310079A (en) | 1928-01-18 | 1928-01-18 | Improvements relating to sound recording and reproducing means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB171128A GB310079A (en) | 1928-01-18 | 1928-01-18 | Improvements relating to sound recording and reproducing means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB310079A true GB310079A (en) | 1929-04-18 |
Family
ID=9726675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB171128A Expired GB310079A (en) | 1928-01-18 | 1928-01-18 | Improvements relating to sound recording and reproducing means |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB310079A (en) |
-
1928
- 1928-01-18 GB GB171128A patent/GB310079A/en not_active Expired
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