GB191108976A - High Speed Friction Saw. - Google Patents

Abstract

8976. Hendee, E. T. April 11. Circular-saw machines; sawing-machine tables; machine saws.-A high-speed friction-saw machine of the type described in Specification 195/07 comprises a saw 13, Fig. 7, having a notched periphery 51 mounted directly on the shaft of a motor 10, Fig. 2, fixed to a carriage 8 slidable horizontally on rollers 15 carried by vertical flanges 19 on the main frame 1. The work is held in a perpendicular or oblique position relative to the saw against or by a clamping- device 4, which is pivoted to a bracket 3 on the frame 1 and is secured at the required angle by a bolt 70. The saw is reciprocated to cut the work by a hand-lever 45 carrying a pawl 46 engaging a notched sector 41 on the shaft 39 of a rocking arm 38 connected to a bracket 32 on the under surface of the carriage 8 by a link 37. The pawl 46 may be disengaged from the sector 41 by means of a handle 49. The rollers 15 supporting the carriage 8 are mounted so as to allow vertical adjustment on the eccentric heads of screws 17 secured to the flanges 19 by nuts 18. The carriage 8 is prevented from tilting by bars 21 which are in contact with the lower surfaces of the rollers 15 and also with the horizontal guide-rollers 24. The rollers 15 are lubricated by oil from a pipe 28 passing through the heads 17 to the bearing- surfaces. -The saw rotates within a hood 53, 54, 55 pivoted to the carriage 8 and provided with a hinged inspection gate secured by the lock 65. Perforated semicircular pipes 56 connected up to a supply of cooling-water are secured to the inner surfaces of the hood side plates, the supply-valve being controlled by a handle 62. In a modification the armature shaft 11, Fig. 5, is formed with a square extension on which a sleeve 75 carrying the saw is mounted in suitable bearings 76, 77, this arrangement permitting the armature shaft to reciprocate without affecting the saw.