Pulling over mechanism

A pulling over mechanism comprising:

• a pincers mounted for heightwise movement between upper and lower positions;
• powered means for effecting said heightwise movement;
• means for initially causing the powered means to retain the pincers in its upper position;
• a handle so mounted as to be movable away from an idle position;
• connecting means so connecting the handle to the pincers as to cause the pincers to be lowered from its upper position to an intermediate position in response to movement of the handle from its idle position to an advanced position, the distance between the pincers upper position and the pincers intermediate position being proportional to the extent of movement of the handle away from its idle position to its advanced position;
• retaining means enabling the handle to be retained in its advanced position and therefore enabling the pincers to be retained in its intermediate position upon release of the handle in its advanced position;
• means for thereafter actuating the powered means to lower the pincers from its intermediate position to its lower position;
• and means for thereafter actuating the powered means to raise the pincers from its lower position to its upper position;
• characterized in that the machine comprises:
• release means operative to release said connecting means after the handle has been moved to its advanced position and prior to the actuation of the powered means to lower the pincers from its intermediate position to its lower position;
• and return means operative to thereafter return the handle to its idle position.