Patent ID: 7154818

Claim:
A radio controlled clock movement control system, comprising: a first stepper motor; a second stepper; wherein the first and second stepper motors are operated independently; a first gearing containing a second wheel which is driven by the first stepper motor, wherein the second wheel has two through holes formed in succession over one sector near the rim of the wheel; a second gearing containing a minute wheel and an hour wheel, partially overlapping each other and rotating with different speeds, which are driven by the second stepper motor, wherein the minute wheel has four through holes formed in succession over one sector near the rim of the wheel, and the hour wheel has one through hole on the same side as the through holes on the minute wheel, and the diameter of the through hole on the hour wheel is greater than or equal to a through holes on the minute wheel; a first photo detector being installed on one side to detect through holes on the second wheel, so that when one of the through holes of the second wheel is aligned over the first photo detector, a high voltage signal is output, otherwise a low voltage is normally maintained over the signal line; and a second photo detector being installed on one side to detect through holes on the minute and hour wheels, so that when a through hole of the hour wheel and one of the through holes of the minute wheel are aligned over the second photo detector, a high voltage signal is output, otherwise al low voltage is normally maintained over the signal line.