Electromechanical calendar timepiece
AssigneeEbauches S.A.
InventorsRene Meister, Claude Laesser
Life of this patent
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Abstract
An electromechanical calendar timepiece has a date display provided by two indicators carrying the "units" and tens data, respectively. The motor which drives these indicators can rotate at a normal speed or at a considerably higher speed. The units data comprise two consecutive figures "1" intended to display, respectively, the unit of the thirty-first of the months having thirty-one days and the first of each month, and one or the other of which displays the units of the eleventh and twenty-first of each month. The motor rotates at said higher speed on the one hand at the end of the months having less than thirty-one days and on the other hand twice each month, i.e. each time the "1" of the units data is displayed at the beginning of the second and the third decades.
Claims10
An electromechanical calendar timepiece comprising:
- means for generating time-base pulses;
- a frequency divider circuit connected to receive said time-base pulses;
- a motor;
- a gear train driven by the motor;
- time display elements driven by said gear train;
- a date display system comprising a first rotatable indicating member driven stepwise by the gear train and carrying at least one set of numerals for displaying the units of the date, with two consecutive "1" for displaying respectively the "1" of the 31st and the "1" of the 1st, and a second rotatable indicating member driven stepwise by the first indicating member and carrying at least one set of numerals for displaying the tens of the date;
- means for producing a first signal at the end of the months of thirty days;
- means for producing a second signal when the units indicating member displays its first "1" at the beginning of the second and third decades of the month;
- and
- control means coupled with said frequency divider for normally driving said motor at a normal speed and responsive to said first and second signals for driving the motor at a speed substantially higher than said normal speed for a number or revolutions corresponding to one day.
Dependencies are inferred from the claim text.