Watch movement
AssigneeJean-Marc Wiederrecht
InventorsJean-Marc Wiederrecht, Saskia Bouvier
Life of this patent
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Abstract
The invention relates to a watch movement comprising an annular casing (10), having an external diameter D, which is provided with a central round opening (48) that is defined by an internal diameter d. According to the invention, the gear train (34) comprises a mobile (36) consisting of a minute wheel (36a) and a pinion (36b), a cannon pinion (38), which is driven by the minute wheel (36a) and intended to support a minute hand (40), and an hour wheel (42) which is driven by the pinion (36b) and intended to support an hour hand (44). The cannon pinion (38) and the hour casing (10) and are provided with a central opening that is more or less equal to d. The minute wheel (36a) is provided with a diameter that is slightly smaller than (D−d)/2.
Claims25
A watch movement comprising an annular frame (10), of external diameter D, provided with a round central opening (48) defined by an internal diameter d and, borne by said frame:
- an energy source (16),
- a time base (18),
- a counting device (20) actuated in synchronization with the time base (18),
- a work train (26) actuated by said device (20),
- a motion work train (34), arranged to bear analog time display means (40, 44), and
- correcting means (46, 50, 56, 58) for the display means (40, 44),
- characterized in that the motion work train (34) comprises a motion work mobile (36) containing a wheel (36a) and a pinion (36b), a cannon pinion (38) driven by the motion work wheel (36a) and intended to bear a minute hand (40), and an hour wheel (42) driven by the motion work pinion (36b) and intended to bear an hour hand (44), in that the cannon pinion (38) and the hour wheel (42) are concentric to the frame (10) and have a central opening substantially equal to d, and in that the work train contains a first mobile (28) provided with a spindle (28c) on which the motion work mobile (36) is friction-mounted.
Dependencies are inferred from the claim text.