JPS5489612A - Magnetic recorder and reproducer - Google Patents
Magnetic recorder and reproducerInfo
- Publication number
- JPS5489612A JPS5489612A JP15635977A JP15635977A JPS5489612A JP S5489612 A JPS5489612 A JP S5489612A JP 15635977 A JP15635977 A JP 15635977A JP 15635977 A JP15635977 A JP 15635977A JP S5489612 A JPS5489612 A JP S5489612A
- Authority
- JP
- Japan
- Prior art keywords
- drum
- diameter
- supplied
- time
- rotary 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.)
- Pending
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
- G11B5/008—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires
Landscapes
- Recording Or Reproducing By Magnetic Means (AREA)
Abstract
PURPOSE:To reduce drum diameter and achieve the miniaturization of the apparatus by specifying the winding angle of a recording medium on a rotary drum and the head disposition angles of 2 sets 4 pieces at specific values and operating the heads through changing over. CONSTITUTION:The period when signal currents are supplied to magnetic heads 1 thru 4 of 2 sets 4 pieces twice those of ordinary ones disposed adjacently at an angle 90 deg. is so defined that during the time when the signal current is supplied to a certain head in this period no signal currents are supplied to other head except at the overlapping if the portion where a magnetic tape (t) is wound to a rotary drum (d) is let to be 270 deg. + alpha deg.. As a result, if the diameter of the drum (d) is let to be D1, the diameter of ordinary one to be D0 and track length to be L, these become L=1/2piD0=3/4piD, D=2/3D0. The number of revolutions f of the drum becomes T=theta/360t, f=1/T 360/270 if the time of 1 field is let to be (t) and the time when the drum rotates by the angle theta to be T, thus as compared to ordinary ones on particularly high speeds are required. Thereby, the rotary drum diameter may be reduced and the apparatus miniaturized.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15635977A JPS5489612A (en) | 1977-12-27 | 1977-12-27 | Magnetic recorder and reproducer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15635977A JPS5489612A (en) | 1977-12-27 | 1977-12-27 | Magnetic recorder and reproducer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5489612A true JPS5489612A (en) | 1979-07-16 |
Family
ID=15626025
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15635977A Pending JPS5489612A (en) | 1977-12-27 | 1977-12-27 | Magnetic recorder and reproducer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5489612A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5683814A (en) * | 1979-12-13 | 1981-07-08 | Matsushita Electric Ind Co Ltd | Magnetic recording and reproducing device |
JPS5978511U (en) * | 1982-11-18 | 1984-05-28 | 日本ビクター株式会社 | magnetic playback device |
JPS61108270A (en) * | 1984-10-31 | 1986-05-26 | Mitsubishi Electric Corp | Magnetic recording and reproducing device |
JPS61174885A (en) * | 1985-01-29 | 1986-08-06 | Mitsubishi Electric Corp | Magnetic recording and reproducing device |
JPS6427001A (en) * | 1988-04-13 | 1989-01-30 | Sanyo Electric Co | Magnetic recording and reproducing machine |
-
1977
- 1977-12-27 JP JP15635977A patent/JPS5489612A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5683814A (en) * | 1979-12-13 | 1981-07-08 | Matsushita Electric Ind Co Ltd | Magnetic recording and reproducing device |
JPS5978511U (en) * | 1982-11-18 | 1984-05-28 | 日本ビクター株式会社 | magnetic playback device |
JPH0325311Y2 (en) * | 1982-11-18 | 1991-05-31 | ||
JPS61108270A (en) * | 1984-10-31 | 1986-05-26 | Mitsubishi Electric Corp | Magnetic recording and reproducing device |
JPS61174885A (en) * | 1985-01-29 | 1986-08-06 | Mitsubishi Electric Corp | Magnetic recording and reproducing device |
JPS6427001A (en) * | 1988-04-13 | 1989-01-30 | Sanyo Electric Co | Magnetic recording and reproducing machine |
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