GB634675A - Improvements in or relating to apparatus using a magnetisable recording medium - Google Patents
Improvements in or relating to apparatus using a magnetisable recording mediumInfo
- Publication number
- GB634675A GB634675A GB1786347A GB1786347A GB634675A GB 634675 A GB634675 A GB 634675A GB 1786347 A GB1786347 A GB 1786347A GB 1786347 A GB1786347 A GB 1786347A GB 634675 A GB634675 A GB 634675A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tape
- scanning heads
- recording
- driven
- drum
- 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
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/004—Recording on, or reproducing or erasing from, magnetic drums
Landscapes
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
Abstract
634,675. Electromagnetic sound recording. GENERAL ELECTRIC CO., Ltd., and POLGREEN, G. R. July 7, 1947, No. 17863. [Class 40 (ii)] In electrical recording or reproduction apparatus of the type employing a magnetisable recording tape, the tape 1 is fitted to the apparatus in the form of a flexible endless band and is driven by a motor-operated drum 2 past electromagnetic scanning heads 12, 13, 14 which are driven in a direction parallel to the axis of the drum 2 so that the tape is spirally scanned. The scanning heads may be driven by a lead-screw 16 which is operated through gearing by the drum motor and may be clutched to the common support 15 of the scanning heads; alternatively, spiral grooves may be provided in the tape and co-operate with the scanning heads to cause their transverse movement. The support 15 may also carry a soft pencil &c. which marks the tape and thereby indicates the portion of the tape which is scanned. During recording such marking may be varied automatically and thus provide indications of no-signal periods. The tape is passed over rollers 3, 4, 5, the roller 3 being carried in movable bearings on a lever 9 which may be raised to tighten the tape on the rollers or lowered to permit removal of the tape.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1786347A GB634675A (en) | 1947-07-07 | 1947-07-07 | Improvements in or relating to apparatus using a magnetisable recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1786347A GB634675A (en) | 1947-07-07 | 1947-07-07 | Improvements in or relating to apparatus using a magnetisable recording medium |
Publications (1)
Publication Number | Publication Date |
---|---|
GB634675A true GB634675A (en) | 1950-03-22 |
Family
ID=10102525
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1786347A Expired GB634675A (en) | 1947-07-07 | 1947-07-07 | Improvements in or relating to apparatus using a magnetisable recording medium |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB634675A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2900191A (en) * | 1953-02-11 | 1959-08-18 | Dictaphone Corp | Dictation apparatus |
DE2843734A1 (en) * | 1977-10-07 | 1979-04-12 | Thomson Csf | RECORDING AND READING DEVICE FOR INFORMATION ON A MAGNETIC TAPE |
-
1947
- 1947-07-07 GB GB1786347A patent/GB634675A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2900191A (en) * | 1953-02-11 | 1959-08-18 | Dictaphone Corp | Dictation apparatus |
DE2843734A1 (en) * | 1977-10-07 | 1979-04-12 | Thomson Csf | RECORDING AND READING DEVICE FOR INFORMATION ON A MAGNETIC TAPE |
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