JPS57141042A - Magnetic video recording and reproducing device - Google Patents
Magnetic video recording and reproducing deviceInfo
- Publication number
- JPS57141042A JPS57141042A JP56024515A JP2451581A JPS57141042A JP S57141042 A JPS57141042 A JP S57141042A JP 56024515 A JP56024515 A JP 56024515A JP 2451581 A JP2451581 A JP 2451581A JP S57141042 A JPS57141042 A JP S57141042A
- Authority
- JP
- Japan
- Prior art keywords
- tape
- metal tape
- coil
- metal
- constitution
- 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
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/02—Control of operating function, e.g. switching from recording to reproducing
- G11B15/05—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container
Landscapes
- Television Signal Processing For Recording (AREA)
Abstract
PURPOSE:To detect automatically a metal tape with a simple constitution to prevent the failure of recording, by detecting the difference of magnetic reluctance between a normal tape and the metal tape by a detecting coil and switching an electric circuit for the metal tape. CONSTITUTION:A magnetic closed path is constituted with the core of a detecting coil 2 and the magnetic layer surface of a tape 1, and an LC oscillator 3, an f-v converter 4, etc. are connected to the coil 2 In this constitution, when a tape 1 is brought into contact with the coil 2, the inductance of the coil 2 is changed to change the frequency of the LC oscillator 3 because a normal tape and a metal tape are different in magnetic reluctance. This change is converted to a voltage by the f-v converter 4 and is compared in a comparator 5 to detect whether the tape 1 is the normal tape or the metal tape. If the tape 1 is the metal tape, a recording current, an erasing current, etc. are switched through a detector to be adapted to the metal tape. Thus, the metal tape is detected with a simple constitution to prevent the failure of recording.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56024515A JPS57141042A (en) | 1981-02-20 | 1981-02-20 | Magnetic video recording and reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56024515A JPS57141042A (en) | 1981-02-20 | 1981-02-20 | Magnetic video recording and reproducing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57141042A true JPS57141042A (en) | 1982-09-01 |
Family
ID=12140304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56024515A Pending JPS57141042A (en) | 1981-02-20 | 1981-02-20 | Magnetic video recording and reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57141042A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0247787A2 (en) * | 1986-05-24 | 1987-12-02 | Sony Corporation | Tape recorders having flying erase heads |
-
1981
- 1981-02-20 JP JP56024515A patent/JPS57141042A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0247787A2 (en) * | 1986-05-24 | 1987-12-02 | Sony Corporation | Tape recorders having flying erase heads |
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