GB427790A - Improvements in and relating to sound reproducing apparatus - Google Patents
Improvements in and relating to sound reproducing apparatusInfo
- Publication number
- GB427790A GB427790A GB2777/35A GB277735A GB427790A GB 427790 A GB427790 A GB 427790A GB 2777/35 A GB2777/35 A GB 2777/35A GB 277735 A GB277735 A GB 277735A GB 427790 A GB427790 A GB 427790A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sound
- record
- jan
- drum
- 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
- 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 Measured Values (AREA)
Abstract
427,790. Photographic sound-records. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London. Jan. 28, 1935, No. 2777. Convention date, Jan. 27, 1934. [Class 98 (ii)] [See also Group XXXVIII] A cylindrical sound record member 1 which is supported on a drum 2, for sound reproduction, has the record, which may be produced photographically or mechanically, or ink printed, extending from one end thereof to the other in the form of a helical track. Alternatively, the sound record member may be in the form of a paper &c. strip having one or more sound record tracks thereon and adapted to be wrapped around the drum 2. The record shown is of the double-hump type.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US427790XA | 1934-01-27 | 1934-01-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB427790A true GB427790A (en) | 1935-04-30 |
Family
ID=21923706
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2777/35A Expired GB427790A (en) | 1934-01-27 | 1935-01-28 | Improvements in and relating to sound reproducing apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB427790A (en) |
-
1935
- 1935-01-28 GB GB2777/35A patent/GB427790A/en not_active Expired
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