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The Clutch Wheel Reference no 407 |
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A clever invention by Patek Philippe in 1841 enabled one button to have the double function of both winding and setting the watch. The double function is achieved in a very clever way by letting a clutch wheel slide back and forth on the winding stem (401). The stem is square at the portion where the clutch wheel slides so the clutch wheel will turn when the stem is turned.
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A top view of the clutch
wheel where the square hole can be seen into which the winding stem
(401) is fitted.
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Here the place of the Clutch Wheel (407) in
the movement can been seen in the winding position i.e. the Clutch Wheel
engages the Crown Wheel (430) through their Breguet (ratchet) toothing.
The Mainspring in the Barrel is in its unwound state.
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| Here the the Clutch Wheel (407) in the movement can been seen in the setting position i.e. the Clutch Wheel engages the Setting Wheel (450). |
