GB612727A - Universal grinder head - Google Patents

Abstract

612,727. Grinding and polishing. JAKOBSEN, H. S. Feb. 26, 1946, No. 6010. [Class 60] [Also in Group XXII] A grinding-machine comprises a headstock 10 and a grinder head, said headstock comprising a fixed base 20, a turntable 30 mounted on said base, rotatable with respect thereto on a vertical axis, micrometric means 39, 41, 43 adapted to adjust the position of said turntable relative to the base 20, work-holding means 70 pivoted to said turntable on a horizontal pivot 61, said work-holding means comprising a draw-in collet chuck attachment 73, 77, 78, Fig. 3, geared, at 90, 91, to a flexible motor-driven shaft 92, a pattern 151 mounted on said attachment, an adjustable rocker arm 125, 121 clamped to a horizontal pivot 120 rotatably fixed to said work-holding means 70, a second, oppositely disposed arm 133 adjustably clamped to said horizontal pivot 120, a bell-crank 134 adjustably fixed to said turntable and engaging, and serving as a fulcrum for, the second arm 133, and tensioning means 95 adapted to bring the rocker arm 125 into yieldable engagement with the pattern 151. Depth of cut is limited by the engagement of a bar 93 bolted to the head 70 with an adjustable stop 115, a crank handle 102 disengaging the bar 93 while the stop 115 is being adjusted. A footstock may be attached to a bar 140 carried by the head 70.