Automatic switching device for cassette tape recorder with low frequency compensating means
AssigneeOlympus Optical Co., Ltd.
InventorMasaaki Sato
Life of this patent
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Abstract
An automatic switching device for a cassette tape recorder is provided which includes a detecting member disposed within the tape recorder for cooperation with at least one detection opening provided in a tape cassette so as to indicate the variety of a magnetic tape internally housed therein, thereby establishing an optimum bias and/or an optimum tape speed for the tape recorder, a compensation circuit compensates for low frequency signals recorded on the tape when the detecting member determines that such compensation is desirable.
Claims13
An automatic switching device for use in a cassette tape recorder adapted to receive a tape cassette and including a tape head, the switching device comprising:
- tape erasure prevention means including means for detecting the removal of a lug covering an erasure prevention aperture in said tape cassette;
- first means for detecting the presence or absence of a first aperture in said tape cassette, the presence or absence of said first aperture being representative of the relative coercivity of the magnetic tape housed by said cassette;
- second means for detecting the presence or absence of a second aperture in said tape cassette, the presence or absence of said second aperture being representative of a desired running speed;
- third means responsive to said first means for controlling the biasing current to said tape head in accordance with the coercivity of the tape housed in said tape cassette as indicated by the presence or absence of said first aperture;
- and
- fourth means responsive to said first and second means for compensating for low frequency signals recorded on said tape cassette when the presence or absence of said first and second apertures indicates that such compensation is desirable.
Dependencies are inferred from the claim text.