| 摘要 |
PURPOSE:To realize the recording for both the information requiring the record protection and the information requiring the rewriting onto an optional track of the same magnetic tape, by adding the simple switch to the magnetic head driving circuit. CONSTITUTION:Track writing erasing inhibition switches 7-9 are provided to the current route which is common to writing heads 1-3 and erasing heads 4-6 each and with every track. Thus the inhibition of writing and erasion concerning the optional track can be inhibited by opening the switches 1-3 plus 4-6 corresponding to the optional track. In such way, the recording is possible on an optional track of the same magnetic tape for both the information requiring the record protection and the information requiring the rewriting each, by adding the simple switch to the magnetic head driving circuit. |
