American Time Synchronous Wired and Electronic Movement - Manual

American Time - 140 3rd Street South - PO Box 707 - Dassel, MN 55325-0707
Synchronous Wired and Electronic Movement Manual
Hanson Movement
General
Synchronous-wired and electronic secondaries are
controlled by a Hansen movement. Except for a short
correction cycle each hour, the movement is solely
responsible for the timekeeping accuracy of the
secondary.
Normal Drive (Fig. 59)
Second Hand
1. A 1rpm synchronous motor drives motor pinion A
directly.
2. Pinion A drives second hand shaft B via friction
coupling assembly C.
Minute Hand
3. Pinion D which is fixed to friction coupling
assembly C drives seconds-to-minute reduction gear E.
4. Pinion f which is fixed to gear E, drives minute
drive gear G.
5. Gear G drives pinion J via friction spring K. Minute
hand shaft H is fixed to pinion J.
Hour hand
6. Pinion J drives intermediate gear L.
7. Pinion M which is fixed to gear L, drives hour drive
gear P. Hour hand shaft N is fixed to gear P.
Fig. 59
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