Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism
Patent
1979-02-14
1981-02-24
Wolff, John H.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
G11B 1700
Patent
active
042531241
ABSTRACT:
A tape recorder, wherein a plurality of magnets are mounted on the peripheral surface of a rotary disc supported on a magnetic tape takeup (feed) reel in order to measure the travelling distance of a magnetic tape; and when said magnets are brought to rest in such position as causes a lead switch to be operated at the cutoff of a main power source, then a transistor connected to one end of the lead switch is rendered nonconducting by its base resistor, thereby interrupting the input circuit of a counter-display section.
REFERENCES:
patent: 3949425 (1976-04-01), Perret et al.
patent: 4005483 (1977-01-01), Kuwano
Furuta Kenzi
Sato Masanobu
Casio Computer Co. Ltd.
Olympus Optical Co,. Ltd.
Wolff John H.
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