by use of toothed gears

Full Title

Driving or feeding mechanisms; Control arrangements therefor (automatic control B23Q15/00; copying B23Q33/00, B23Q35/00; specially adapted for boring or drilling machines B23B39/10, B23B47/00 ) > Feeding members carrying tools or work > Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission > feeding continuously > with variable speed ratio > by use of toothed gears