Patent ID: 6330207
Filing Date: 2001-12-11
Classification: G01B,G01D,G04C,G04D,H03K

Abstract:
A timepiece including:a clockwork movement provided with an analogue display and including one wheel fixed in rotation to a rotating analogue display means forming part of said analogue display, said wheel including a plate with a toothing defined by its external edge and a shaft perpendicular to said plate;a device for detecting the angular position of at least one reference geometric semi-axis of said wheel, said device including a magnetic sensor provided with a detection element;said plate of said wheel being formed by a material a variation in whose presence above or below the detection element of the sensor generates a variation in at least one parameter or one variable of said sensor on which a measuring signal provided by said sensor depends, said plate having at least one opening situated in the intermediate region thereof between a central hole, provided for the passage of said shaft, and said toothing, this opening being used to define said at least one reference geometric semi-axis, said sensor being arranged in relation to the wheel so that its detection element is at least partially above or below said opening in at least one given angular position of said wheel.