Dynamic magnetic information storage or retrieval – Recording for selective retention of a special occurrence
Patent
1977-01-12
1978-09-19
Lucas, Jay P.
Dynamic magnetic information storage or retrieval
Recording for selective retention of a special occurrence
360 35, 360 36, 360 37, G11B 500, H04N 5795
Patent
active
041158180
ABSTRACT:
A system for monitoring evolutive information data picked up at various pts in associated informatics equipment and analyzing selected information data sequences comprises means for permanently recording information data on a continuous track magnetic carrier having automatic erase means at the end of each track. Recorded sequences of information data are controllably displayed after the data has been written in. At the write-to-read switching operation, an index marking the origin of the information sequences to be displayed is recorded on a special track of the carrier and said index is thereafter used for synchronization of the display on a CRT. A clock pulse counter circuit under the control of an operator enables him to vary the origin of the displays. The clock pulse counter circuit comprises a clock pulse counter, a manually operable pulse count selector and a comparator, the output of which is connected to deliver a trigger pulse, each time the count of the counter agrees with the pulse count manually selected by the operator which may thus vary the origin of the display without losing the true origin of the information data sequences stored on the carrier.
REFERENCES:
patent: 3243798 (1966-03-01), Senders
patent: 3461429 (1969-08-01), Gray
patent: 3549799 (1970-12-01), Sander
patent: 3787827 (1974-01-01), Stout
patent: 3911484 (1975-10-01), Mutou
patent: 4006737 (1977-02-01), Cherry
patent: 4035843 (1977-07-01), Tanimura
Compagnie Internationale pour l'Informatique Cii Honeywell Bull
Lucas Jay P.
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