| 摘要 |
<p>A tachograph is provided in which 12 indicates a trace of pen 7 on track 11 corresponding to the "driving" position and 10 indicates a trace on track 9 corresponding to one of a plurality of "stationary" positions selected by switch 50, the pen 7 being automatically movable between the "driving" position and the "stationary" position. The pen 7 is supported by a pivoting lever 3 urged by spring 25 towards the "stationary" position. An indicator member 5, to which is imparted an alternating movement 17 when the vehicle is moving, has a resilient member 24 secured to it, which oscillates lever 3 about axis 16, and is provided with a push rod 27 tending alternately to push the lever 3 and pen 7 into the "driving" position and allow them to return to the "stationary" position. However, when the vehicle is moving, a retractable stop 39 opposes this return. An electrical control device sensing stoppage of the vehicle operates automatically to retract the stop 39 and push-rod 27 after a time delay to allow the pen to move to the "stationary" position. <IMAGE></p> |
