517,019. Sawing. LEE E. C. June 14, 1938, No. 17579. [Class 145 (ii)] Reciprocating saws for cutting wood, soft metal' &c. are guided in a straight path and operated by a flexible member coupled to each end of the saw and moved by a device applied at an intermediate point. The flexible member may be divided, the adjacent ends being connected to the same operating device. A pump blows away the dust and also withdraws and separates it. The saw 3 is secured at its ends to members working in vertical guides and is subjected to a constant tension by the flexible element 7 passing over' four guide pulleys 5, 5a, 6, 8, the pulleys 5a, 8 being adjustable for tensioning' purposes. Pulley 8 is oscillated to operate the saw, by a link and crank rotated by an electromotor 11. A bar limits the upward movement of the upper sliding member if the saw breaks. A suction pump 19x operated by motor 11 draws air from the neighbourhood of the saw through pipe 16 and filter chamber 17 and discharges' air through nozzle 18a to loosen dust from the saw. A further suction pipe 19 also collects the loosened dust, being connected to the hollow presser foot 15 which holds the work in position on the table.