A guide device , fixed to the reference device , enables the apparatus to engage a crankpin, in the course of {HEAD ~ the orbital motion} of {TAIL ~ the crankpin}, and limit the displacements of the first arm and those of the second arm when a control device displaces the apparatus to a rest position 
A guide device , fixed to the reference device , enables the apparatus to engage a crankpin , in the course of { HEAD ~ the orbital motion } of { TAIL ~ the crankpin } , and limit the displacements of the first arm and those of the second arm when a control device displaces the apparatus to a rest position
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH