rranged perpendicular to screw shaft axis, e.g. helical gears engaging tangentially the screw shaft} [2013???01]F16H 25/205. . . {comprising alternate power paths, e.g. for fail safe back-up} [2013???01]WARNING This group is not complete pending reclassification; see also F16H 25/20 and subgroups F16H 2025/2053. . . {Screws in parallel arrangement driven simultaneously with an output member moved