G - Physics – 04 – C
Patent
G - Physics
04
C
58/11
G04C 3/14 (2006.01) G04B 27/04 (2006.01)
Patent
CA 2020337
ABSTRACT OF THE DISCLOSURE Improvement in a three hand movement of the type having a frame, a stepping motor mounted in the frame, a manually actuatable timesetting stem disposed in the frame and a gear train driven by the stepping motor to rotate coaxial members carrying "seconds", "minutes", and "hours" hands. An improved dual reduction gear assembly comprises a first rotatable member with a toothed wheel and a second rotatable member having first and second pinions driving the "hours" and "minutes" wheels. A timesetting gear is adapted to be clutched to the "minute wheel". A friction coupling connects the first and second rotatable members during timekeeping. During timesetting, the friction coupling slips to disengage the toothed wheel from the first and second pinions, so that the second rotatable member separately functions as a reduction gear during timesetting.
Gowling Lafleur Henderson Llp
Schwartz Herbert
Timex Corporation
LandOfFree
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