GB838209A - Improvements in or relating to magnetic reproducing apparatus - Google Patents
Improvements in or relating to magnetic reproducing apparatusInfo
- Publication number
- GB838209A GB838209A GB4185/59A GB418559A GB838209A GB 838209 A GB838209 A GB 838209A GB 4185/59 A GB4185/59 A GB 4185/59A GB 418559 A GB418559 A GB 418559A GB 838209 A GB838209 A GB 838209A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reproducing apparatus
- signal
- relating
- magnetic reproducing
- parent specification
- 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
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/22—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing distortions
- G11B20/225—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing distortions for reducing wow or flutter
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
Abstract
838,209. Magnetic recording and reproducing apparatus. ELECTRIC & MUSICAL INDUS. TRIES Ltd. Feb. 6, 1959, No. 4185/59. Addition to 762,699. Drawings to Specification. Class 40 (2). Phase-difference modulated magnetic recorder as in the parent Specification, except that a signal, free of phase error, is produced from the duplicated tracks, especially by means of a combining type reproducing head and this signal is used in conjunction with that derived from the unduplicated track to produce the output. In a further embodiment, symmetric antiphase modulation of the two carriers is used in place of the single-sided method described in the parent Specification.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB12405/54A GB762699A (en) | 1954-04-29 | 1954-04-29 | Improvements in or relating to magnetic reproducing apparatus |
GB4185/59A GB838209A (en) | 1954-04-29 | 1959-02-06 | Improvements in or relating to magnetic reproducing apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB12405/54A GB762699A (en) | 1954-04-29 | 1954-04-29 | Improvements in or relating to magnetic reproducing apparatus |
GB4185/59A GB838209A (en) | 1954-04-29 | 1959-02-06 | Improvements in or relating to magnetic reproducing apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB838209A true GB838209A (en) | 1960-06-22 |
Family
ID=62529338
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB12405/54A Expired GB762699A (en) | 1954-04-29 | 1954-04-29 | Improvements in or relating to magnetic reproducing apparatus |
GB4185/59A Expired GB838209A (en) | 1954-04-29 | 1959-02-06 | Improvements in or relating to magnetic reproducing apparatus |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB12405/54A Expired GB762699A (en) | 1954-04-29 | 1954-04-29 | Improvements in or relating to magnetic reproducing apparatus |
Country Status (1)
Country | Link |
---|---|
GB (2) | GB762699A (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3204228A (en) * | 1955-11-16 | 1965-08-31 | Sperry Rand Corp | Signal synchronizer |
US3051797A (en) * | 1959-03-09 | 1962-08-28 | Minnesota Mining & Mfg | Transducing system |
US3174090A (en) * | 1959-04-27 | 1965-03-16 | Rca Corp | Phase responsive motor speed control system |
US3187092A (en) * | 1959-04-27 | 1965-06-01 | Rca Corp | Speed control system using parallel control loops |
US3263031A (en) * | 1962-05-29 | 1966-07-26 | Sperry Rand Corp | High-low frequency homing |
JPS53149308A (en) * | 1977-06-01 | 1978-12-26 | Matsushita Electric Ind Co Ltd | Recorder-reproducer of digital signals |
-
1954
- 1954-04-29 GB GB12405/54A patent/GB762699A/en not_active Expired
-
1959
- 1959-02-06 GB GB4185/59A patent/GB838209A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB762699A (en) | 1956-12-05 |
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