GB461120A - Improvements in and relating to sound recording apparatus - Google Patents
Improvements in and relating to sound recording apparatusInfo
- Publication number
- GB461120A GB461120A GB22584/36A GB2258436A GB461120A GB 461120 A GB461120 A GB 461120A GB 22584/36 A GB22584/36 A GB 22584/36A GB 2258436 A GB2258436 A GB 2258436A GB 461120 A GB461120 A GB 461120A
- Authority
- GB
- United Kingdom
- Prior art keywords
- current
- instrument
- winding
- circuit
- fed
- 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
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
Landscapes
- Recording Or Reproducing By Magnetic Means (AREA)
- Amplifiers (AREA)
Abstract
461,120. Gramophone recording circuits. LEITHAUSER, G. Aug. 17, 1936, No. 22584. Convention date, Oct. 8, 1935. [Class 40 (iv)] The mean position of the recording element of an electromagnetic or electro-optical recording instrument connected in the anode circuit of an amplifying valve varies with variations of the direct current component. To compensate this effect, additional direct current dependent on and opposed to said component is fed to the instrument. As described, the instrument has an additional winding to which the opposing current is fed. The opposing current may be the anode current of a second valve which is caused to vary in accordance with the current variations of the amplifying valve, or a direct current instrument in the anode circuit of the amplifying valve may control a variable resistance in the circuit of the second winding which is fed by a D.C. source. The windings may be on separate cores, but where they are on the same core a low-frequency choke is inserted in the circuit of the compensating winding to prevent it from short-circuiting the audio-frequency currents in the main winding.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE461120X | 1935-10-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB461120A true GB461120A (en) | 1937-02-10 |
Family
ID=6539828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB22584/36A Expired GB461120A (en) | 1935-10-08 | 1936-08-17 | Improvements in and relating to sound recording apparatus |
Country Status (2)
| Country | Link |
|---|---|
| AT (1) | AT151434B (en) |
| GB (1) | GB461120A (en) |
-
1936
- 1936-07-11 AT AT151434D patent/AT151434B/en active
- 1936-08-17 GB GB22584/36A patent/GB461120A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| AT151434B (en) | 1937-11-10 |
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