Wristwatch
AssigneeMontres Rolex S.A.
InventorsRene Besson, Frank G. Vernay
Life of this patent
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Abstract
The wristwatch displays the date through a window in the dial. To achieve this, the watch comprises a rotatable disc (13) bearing a first series of numbers corresponding to some of the days of the month, and a second series of numbers corresponding to the remaining days, said series being arranged in two concentric circles. To ensure that the date numbers pass the hatch in chronological order, the disc is rotatably driven by a motor (70) combined with an endless screw (71), and translatably driven by a motor (72) combined with an endless screw (73) to pivot a circle sector (74) about a spindle (75). Both said motors are controlled by an electronic circuit (76).
Claims11
A wristwatch having a watch face and means for displaying a current date of a month via a window being provided in said watch face, said means for displaying the date comprising a rotatable disc being movable about a rotational axis, said rotatable disc having a first series of numbers comprising a first portion of the thirty-one possible dates of a month and a second series of numbers comprising a remaining portion of the thirty-one possible dates of a month, the first and second series of numbers being arranged in at least first and second concentric circles, and said watch comprises a mechanism for driving said rotatable disc about said rotational axis,
- wherein said window is dimensioned so as to allow viewing of only one date number at a time from one of said first and second series of numbers, and said mechanism for driving said rotatable disc further includes a mechanism for moving said rotational axis of the rotatable disc radially from a first position in which a desired date number from said first series of number is visible through said window to a second position in which a desired date number from said second series of number is visible through said window.
Dependencies are inferred from the claim text.