Electrical pulse counters – pulse dividers – or shift registers: c – Applications – Position determining
Patent
1980-12-23
1983-08-16
Boudreau, Leo H.
Electrical pulse counters, pulse dividers, or shift registers: c
Applications
Position determining
242 7551, 242 7552, 360 723, 377 24, G11B 1543, G06M 314, H03K 2700
Patent
active
043993559
ABSTRACT:
A display apparatus for tape running positions is provided with a first pulse generator (36) for generating m first pulses for each revolution of a supply reel (12) in a tape transport, a second pulse generator (38) for generating n second pulses for each revolution of a take-up reel (14), and a counter (44 to 48) for counting the number of the first pulses during one period of the second pulse. The ratio of count value change in the counter for a time period from the start to the end of the tape running is expanded to the square of the change ratio of rotational speed of the reel from the beginning to the end of the tape winding. A counting range of the counter at this time is proportional to m
.
REFERENCES:
patent: 2944750 (1960-07-01), Hall
patent: 3564219 (1971-02-01), Mutziger
patent: 3849661 (1974-11-01), Beiter
patent: 3921220 (1975-11-01), Primosch et al.
patent: 4001552 (1977-01-01), Muller
patent: 4140896 (1979-02-01), Robertson
patent: 4172231 (1979-10-01), D'Arc et al.
patent: 4177488 (1979-12-01), Sakai
patent: 4195319 (1980-03-01), Ida
Furuta Kenzi
Satoh Ken
Boudreau Leo H.
Olympus Optical Co,. Ltd.
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