Patent ID: 7445374

Claim:
A chronograph watch movement, including a frame and, carried by the frame, the chronograph watch movement comprising: an energy source, a time base powered by the energy source, a first going train element driven in rotation in synchronism with said time base, said first going train element including a mobile element associated with units of time selected from among the minutes and hours of the current time; and a chronograph mechanism including: a second chronograph train element for driving in synchronism with the time base, said second chronograph train element including first and second wheels respectively completing one revolution in sixty seconds and one revolution in a time allowing the measured units of time, selected from between the hours and minutes, to be displayed, said first wheel and said second wheel being arranged coaxially with said mobile element, said wheels being arranged such that said wheels carry display means for displaying a measured time; a control device for starting and stopping said wheels of said second train; a device for resetting the display means; and a switching means for switching between a connected state and a disconnected state such that said second wheel of said chronograph train is connected to said mobile element of said going train element when said switching means is in a connected state, whereby said display means connected to said second wheel displays the unit of current time equivalent to the measured time, said unit of current time and said unit of measured time being a minute, said switching means including a hammer pivotably mounted on the mobile element, a cam secured to the second wheel and an elastic member holding the hammer abutting against the cam.