Apparatus with arrangement for keeping rotating head in optimal contact with magnetic tape
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsHideyuki Hashi, Shigeki Murata
Life of this patent
Estimating the term…
Abstract
A rotating head apparatus includes an electromechanical conversion element which moves a magnetic head. The electromechanical conversion element allows the contact state between the tape and a rotating head to be stably optimum by varying a voltage applied to the electromechanical conversion element cyclically and according to an output from a discriminator which discriminates the kind of the tape or the rotation speed of the rotating head. Therefore, the apparatus makes it possible to keep the space loss minimum, and prevents a reduction of the performance of signal recording and reproducing.
Claims4
A rotating head apparatus comprising:
- a cylinder which guides a magnetic tape along a helical path over a specific circumferential angle, said magnetic tape being one of a plurality of kinds of magnetic tapes, each kind of magnetic tape having different mechanical characteristics from the other kinds of magnetic tapes, and said cylinder including a rotary cylinder which is rotating at a specific rotational speed;
- a rotating head which is mounted on said rotary cylinder so as to rotate at said specific rotational speed and has a magnetic gap for recording signals on and reproducing signals from said magnetic tape;
- a moving means for pivotally moving said rotating head relative to said rotary cylinder so as to change an angle formed between a center line of said magnetic gap and a normal line to a contacting surface between said rotating head and said magnetic tape;
- a discriminating means for discriminating the kind of said magnetic tape and for outputting a signal indicative of the discriminated kind of said magnetic tape;
- and
- a control means for controlling said moving means according to said signal output from said discriminating means to keep said rotating head in such a contact with said magnetic tape that the center line of said magnetic gap coincides with the normal line to the contacting surface between said rotating head and said magnetic tape.
A rotating head apparatus comprising:
- a cylinder which guides a magnetic tape along a helical path over a specific circumferential angle, said cylinder including a rotary cylinder which is rotating at a specific rotational speed;
- a rotating head which is mounted on said rotary cylinder so as to rotate at said specific rotational speed and has a magnetic gap for recording signals on and reproducing signals from said magnetic tape;
- a moving means for pivotally moving said rotating head relative to said rotary cylinder so as to change an angle formed between a center line of said magnetic gap and a normal line to a contacting surface between said rotating head and said magnetic tape;
- a detecting means for detecting the rotational speed of said rotating head and for outputting a signal indicative of the detected rotational speed;
- and
- a control means for controlling said moving means according to said signal output from said detecting means to keep said rotating head in such a contact with said magnetic tape that the center line of said magnetic gap coincides with the normal line to the contacting surface between said rotating head and said magnetic tape.
Dependencies are inferred from the claim text.