Sawing machine for stone blocks

A machine for sawing blocks of stone comprising:

• support means including a pivot bearing with a horizontal pivot axis fixed a predetermined distance above ground level and centrally on a forward end portion of the support means;
• a triangular straight prism shape frame with a pivot adjacent a forward center apex of the triangular frame connected to the pivot bearing block and mounted to oscillate arcuately about the horizontal pivot axis and in a vertical plane perpendicular to the horizontal pivot axis and the frame having
• spaced triangular shape side members extending parallel and symmetrical to the vertical plane each including
• upper and lower oppositely inclined beams connected together at and extending rearwardly from the forward center apex to opposite ends thereof adjacent upper and lower rear apexes of the triangular side member,
• a forwardly inclined rear beam extending between and fixed to the opposite ends of the upper and lower oppositely inclined beams adjacent the rear apexes of the triangular side member,
• upper and lower cross members extending horizontally across and fixed to the upper and lower beams and including upper and lower overhanging end portions extending beyond opposite sides of the frame adjacent the upper and lower rear apexes thereof;
• a pair of saw blades each having a longitudinal axis adjacent an arc shape cutting edge whose center coincides with the horizontal pivot axis, and opposite extremeties of each blade fixed to the upper and lower overhanging end portions of the upper and lower cross members and between which each blade is tensioned and disposed longitudinally parallel to the vertical plane and spaced outwardly from the adjacent side member of the frame;
• fixation means for fixing the extremities of the saw blades to the upper and lower overhanging end portions and tensioning the saw blades therebetween;
• oscillating means, including a rod having one end pivotally connected to the upper crossmember of the triangular frame and its opposite end pivotally connected to a rotatable crank and able to oscilate the frame and saw blades arcuately about the horizontal axis and maintain the longitudinal axis of the saw blades forwardly inclined at an acute angle to a vertical;
• transport means situated on each side of the frame for supporting and transporting blocks of stone horizontally toward and parallel to the oscillating saw blades and cutting a slab therefrom;
• and
• guide means, extending upwardly and centrally from the support means and situated in between the upper and lower horizontal cross members and the forwardly inclined rear beams of the spaced triangular shape opposite side members of the frame, for supporting and preventing any lateral deviation of the oscillating frame and saw blades relative to the vertical plane.