Hour hand corrector for dual display timepiece
AssigneeSociete Suisse pour l'Industrie Horlogere Management Services S.A.
InventorJean-Pierre Jaunin
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Abstract
A dual display timepiece employs a stepping motor capable of rotation in sense for driving hour and minute hands in an analogue display and an electronic digital display for displaying other information (second, date, chronograph, etc.). In order to facilitate hour hand corrections a logic circuit is provided which permits the user to enter the nature (positive or negative) and the amount of correction desired into the digital display. Following such entry the hour hand is corrected automatically by application of N.times.Y higher than normal frequency signals to the analogue display, where N corresponds to the number of signals required to effect a one hour or half hour correction and Y corresponds to the correction entered by the user.
Claims12
An hour hand corrector for use with a timepiece of the type having a first analogue type display including time-indicating hands to display hours and minutes and a second digital type display employing numbers to display further information, both displays being electronically controlled and the analogue display being normally advanced in accordance with elapsed time, said hour hand corrector comprising means including user accessible switch means adapted to enter information into the digital display, representative of the nature and amount of hour hand correction required, means adapted to generate a correction signal after all information has been entered, a switch and a modulo N counter both responsive to said correction signal to direct higher than normal frequency signals to said analogue display, N being an integer which is a submultiple of the number of said higher frequency signals required to effect correction of the hour-indicating hand of the analogue display according to the information entered by said user accessible switch means.
Dependencies are inferred from the claim text.