Dynamic magnetic information storage or retrieval – Miscellaneous
Patent
1988-09-14
1990-06-26
Tupper, Robert S.
Dynamic magnetic information storage or retrieval
Miscellaneous
360106, 360109, G11B 555, G11B 1702, G11B 2108, G11B 2124
Patent
active
049376950
ABSTRACT:
An apparatus, arranged to use a record bearing medium housed in a container which is provided with a counter device for indicating an amount of recorded information or the remnant recording capacity of the medium, is provided with a transducing head, a mechanism for moving the head relative to the medium, a drive mechanism for driving the counter device of the container in response to movement of the head, and a control device for selectively enabling and disabling the drive mechanism. In a situation where recording and reproduction operations alternate with the use of the same recording medium housed in the container, when it is desired to perform recording, the counter device is rendered operative to indicate the amount of recorded area (or recording position) or the amount of area left unrecorded, and then when it is desired to perform reproduction, the counter device is rendered inoperative to hold the contents of the counter device so that it remains unchanged from that value of the amount of recorded area (recording position) or the amount of fresh area which has been indicated at the termination of the preceding recording operation. When it is desired to proceed to the next recording operation, therefore, there is no possibility of occurrence of either an overlapping recording of information on the recorded area of the recording medium or a blank area between the recorded area and an area to be thereafter recorded.
REFERENCES:
patent: 4536813 (1985-08-01), Saito
The British Journal of Photography, Oct. 30, 1981, Geoffrey Crawley.
Popular Photography, Oct. 1981, Leendert Drukker.
Canon Kabushiki Kaisha
Tupper Robert S.
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