GB528203A - An improved tool for cutting piping into lengths - Google Patents

Abstract

528,203. Portable turning-apparatus. SHOESMITH, H. W. April 29, 1939, No. 12886. [Class 83 (iii)] A manually-operated pipe-cutting tool comprises a C-shaped frame 12 mounted on an operating-handle 11 and carrying four pairs of rollers 15 and a rotatable toothed cutter 26 which is of gradually increasing radius and is rotated to feed the cutter into the work by a slight swinging of the handle 11 round the work in one direction, the cutting being effected by swinging the handle in the opposite direction during which the cutter remains stationary relative to the tool. The cutter is mounted in a slotted frame 18 having a stem 17 passing through the handle and carrying an axiallyfixed sleeve 22 which may be screwed over the threaded part 23 of the handle to adjust the frame to and from the work 35. A pair of serrated discs 34 engaging the work are connected by reducing gears 31 to the cutter spindle. By rotating the sleeve 22 the discs are moved up to grip the pipe while the cutter touches the pipe at its smallest radius. The handle is then swung anti-clockwise to a small extent during which movement the discs are rotated and the cutter fed into the work. The handle is then swung clockwise for the cutting operation, whereupon the discs slip over the pipe and the cutter is not rotated. Further feed movement can then be applied by successive short anti-clockwise rotations until the pipe is severed. In a modification the discs 33, 34 may be friction wheels provided with free-wheel devices.