Perpetual calendar watch having two motors
AssigneeETA SA Fabriques d'Ebauches
InventorsPierre-Andre Meister, Pierre Schmidli, Bruno Erni, Bertrand Soltermann
Life of this patent
Estimating the term…
Loading patent…
AssigneeETA SA Fabriques d'Ebauches
InventorsPierre-Andre Meister, Pierre Schmidli, Bruno Erni, Bertrand Soltermann
Estimating the term…
This invention is concerned with an analogue calendar watch able to display the hour, the day of the month perpetually, and whenever required, the number of the month via the day of the month display. The watch includes a first motor driving the time display in response to a time base signal, a perpetual calendar circuit including a day counter, a month counter and a year counter and receiving a daily signal supplied by a contact, a control circuit connected to the calendar circuit, and a second motor driving the day of the month display in response to a signal from the control circuit. The display of the number of the month is achieved with a reading circuit that receives from the calendar circuit signals representative of the contents of the day and month counters. The reading circuit issues to the second motor, in response to a month call signal, a control signal to change the day of the month being displayed to the number of the month, and a further control signal to move the day of the month display back to its original position.
An electronic watch which comprises:
A watch as in claim, further comprising means for generating a year call signal and a switching circuit, that is connected to the month and year counters, for issuing to the reading circuit, in response to the month call signal, a signal representative of the state of the month counter and, in response to said year call signal, a signal representative of the state of the year counter, and wherein said reading circuit generates, in response to said year call signal, a fourth control signal representative of the gap between the state of the year counter and the state of the day counter which enables the day of the month display means to be set in a position where the number displayed is the number of the year in a 4-year cycle, and then a fifth control signal, also representative of the gap between the states of said counters, which enables the day of the month display means to be returned to a position in which the number displayed is the number of the day.
Dependencies are inferred from the claim text.