Information retrieval apparatus capable of stopping an informati

Details Information retrieval apparatus capable of stopping an informati Information retrieval apparatus capable of stopping an informati

1984-02-27

1986-08-26

Heyman, John S.

Electrical pulse counters, pulse dividers, or shift registers: c

Applications

Position determining

377 39, 377 53, 360 722, 360 746, 235454, 353 26A, G06K 710

Patent

active

046087052

ABSTRACT:
The disclosed apparatus automatically retrieves desired information on an information bearing medium having information and marks. In the retrieving apparatus, the marks are detected and counted during the feed of the information bearing medium. In accordance with the number of the counted marks, the feeding of the data bearing medium is controlled to retrieve the desired data. The apparatus is provided with at least three mark-detecting means for successively detecting the mark and memory means for memorizing the detections of the mark by the respective mark-detecting means, and a mark counting signal is formed from the content in said memory means and the counting signal is counted in order to eliminate the possibility that one and same mark may erroneously be counted twice or more when the feeding speed of the information bearing medium is abruptly changed.

REFERENCES:
patent: 3950652 (1976-04-01), Yamashita
patent: 4016406 (1977-04-01), Eiji Abe et al.
patent: 4351591 (1982-09-01), Stockett
patent: 4356387 (1982-10-01), Tsubota et al.
patent: 4453823 (1984-06-01), Sugita et al.
patent: 4514641 (1985-04-01), Tanaka et al.

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