GB199798A - Improvements in traverse and reversing mechanism applicable for key seating machines - Google Patents

Abstract

199,798. Richards & Co., Ltd., G., and Wilson, F. W. March 28, 1922. Milling-machines.-In traverse and reversing mechanisms, more particularly for key-seating or similar machines in which the tool slide and spindle are traversed by a rotary screw, the screw is driven by worm gearing from a short shaft which is rotated alternately in opposite directions through bevel gears and a sliding clutch. The clutch is actuated by stationary cams and levers at each end of the traverse. The traversing- screw B is driven by worm gearing C from a shaft d on which are loosely mounted bevel wheels E. E', rotated by belt pulleys G, G<1> and connected bv an idle bevel wheel E<2>. Either of the bevel wheels E, E<1> is clutched to the shaft through a slidably keyed sleeve F by levers H, K containing a quick change plunger k and actuated by a reversing rod M, oscillated at each end of the traverse through levers N and inclined cams P. The tool slide is slidable. on the reversing rod, which is preferably of square section, and the levers N are carried bv bushes encircling the rod and rotatably mounted on the slide. One of the bushes may carry another lever for hand reverse. The cams are adjustable by means of screws, the heads of which engage the teeth of a rack P. The worm wheel C may be loose on the screw and clutched thereto by a sliding sleeve and a hand lever, and the screw may be rotated by a hand wheel either secured to it or engaged by the sleeve. According to the Provisional Specification, the reversing rod operates the feed cam.