Number wheel counters
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United States of America Patent
Stats
-
Jun 25, 1991
Grant Date -
N/A
app pub date -
Jul 18, 1989
filing date -
Nov 18, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A number wheel counter has a worm wheel connected with the least significant number wheel. A worm gear engaged with the worm wheel is mounted for both rotational and translational movement about a spindle. Cam means are provided such that as the worm gear is rotated, it is also displaced bodily by the cam means so that the worm wheel remains unmoved. At the end of a defined travel of the cam means, the worm gear is returned rapidly to a rest position driving the worm wheel in the manner of a rack and pinion. In this way the number wheels are driven intermittently with the time interval during which the number wheels are between discreet number positions being minimized.
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Cited Art Landscape
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