Wire-saw

A wire-saw having a sawing wire array, comprising a feeding roller feeding a single wire;

• a take-up roller receiving said single wire;
• a plurality of guide rollers around which said wire is turned a number of times so as to form said sawing wire array;
• a seesaw means with a seesaw lever having seesaw rollers on either end thereof;
• a non-displaceable roller associated with each of said seesaw rollers, said single wire passing from said feed roller to one of said seesaw rollers and associated non-displaceable rollers before continuing on to said sawing wire array, said single wire passing from said sawing wire array to the other of said seesaw rollers and associated non-displaceable roller before passing on to said take-up roller;
• a driving means reciprocatingly rotating a driving guide roller means which drives a pinion means alternately clockwise and counterclockwise, so as to cause the wire in said sawing wire array to reciprocate;
• a mechanical differential means driven by a motor and incorporated within said driving means so as to provide a difference between the clockwise rotation and the counterclockwise rotation of said pinion means such that application of said motor will control the wire feed;
• and
• a swinging means causing said seesaw lever to swing in synchronism with said reciprocation of said driving guide roller means so as to prevent the wire from slackening.