Islamic Hijiri calendar
AssigneeParmigiani Fleurier SA
InventorMichel Parmigiani
Life of this patent
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Abstract
The invention relates to an Islamic Hijiri calendar for a mechanical clockwork movement comprising a 30-position date indicator arranged to be driven by a date-driving mechanism and to engage with a large rocker (7). A month control mechanism is arranged to differentiate between the months with 29 days and those with 30 days. A year control mechanism is arranged to differentiate between an abundant year and a common year. During a common year, a large rocker (7) is arranged to engage with a date star (9), to move two teeth of the date star (9) in order to move from the 29th of a month to the 1st of the following month, the large rocker (7) resting on the month cam (4).
Claims17
An Islamic Hijiri calendar for a mechanical clockwork movement, comprising:
- a 30-position date indicator advancing by a step of one position each day to successively and cyclically display at the end of each day the numbers from 1 to 30, said date indicator being arranged to be driven by a date-driving mechanism and to engage with a large rocker;
- a month control mechanism arranged to differentiate between the months with 29 days and those with 30 days, the month control mechanism comprising a month star engaging with a month cam comprising twelve positions;
- and,
- a year control mechanism arranged to differentiate between an abundant year and a common year, the year control mechanism comprising a year sector arranged to cause a one-step skip by a year star coupled to a year cam comprising flattened teeth and having a resting surface on each flattened tooth on which a finger rests in each plentiful year, the finger resting on a hollow portion between two flattened teeth to indicate a common year,
- wherein the finger is mounted on the month cam which is concentric with the year cam and in that the large rocker is arranged to rest on the month cam and, during a common year, engage directly with a date star, to pass two teeth of the date star from the 29th to the 1st of the next month, the large rocker resting on the month cam.
An Islamic Hijiri calendar for a mechanical clockwork movement, comprising:
- a 30-position date indicator advancing by a step of one position each day to successively and cyclically display at the end of each day the numbers from 1 to 30, said date indicator being arranged to be driven by a date-driving mechanism and to engage with a large rocker;
- a month control mechanism arranged to differentiate between the months with 29 days and those with 30 days, the month control mechanism comprising a month star engaging with a month cam comprising twelve positions;
- and,
- a year control mechanism arranged to differentiate between an abundant year and a common year, the year control mechanism comprising a year sector arranged to cause a one-step skip by a year star coupled to a year cam comprising flattened teeth and having a resting surface on each flattened tooth on which a finger rests in each plentiful year, the finger resting on a hollow portion between two flattened teeth to indicate a common year, the finger is pivotally mounted about an axis and comprising at one end a spout arranged to receive a tip of the large rocker in each abundant year,
- wherein the large rocker is arranged to engage during a common year with a date star, to pass two teeth of the date star from the 29th to the 1st of the next month, the large rocker resting on the month cam.
Dependencies are inferred from the claim text.