Shuttle printer and drive mechanism

Claim 1

A dot printer comprising: at least one printing element; a unitary suspension spring and frame element upon which said printing element is affixed; a platen, said platen being arranged adjacent to and parallel with said frame element on which said printing element is affixed; said suspension spring and frame element comprising at least two comb like shaped plate springs having first, second and third legs, respectively, said first and third legs being the extreme legs and being connected to said frame forming a unitary piece therewith, said second legs thereof being rigidly mounted to a fixed location in said printer to support said comb like shaped plate springs generally orthogonal to an intended print line and parallel with each other; said printing element being affixed to said frame element at a position approximately colinear with the extreme first or third legs of said comb like shaped plate springs which are nearest to said print line; a reciprocating drive means for causing linear reciprocation without orthogonal or off axis forces, said drive means being connected to said frame element and arranged with respect thereto for reciprocating the same; said reciprocating drive means comprising a uniformly rotating electrical motor coupled to a meshed set of non-circular gears for rotating said gears, at least one of said gears providing on an output shaft a non-uniform rotational velocity; a matched circular set of meshed gears each having a pivot on an exposed face thereof at a fixed radial distance from the rotational axis thereof and one of said gears being connected to receive said non-uniform rotational velocity from said output shaft of said non-circular gears; a flexible plastic yoke and drive link in the approximate shape of a "V" with the ends of said "V" being pivotally connected to said pivots on said matched circular set of gears and the point of said "V" being connected to said frame for applying reciprocal linear motion thereto as said circular gears are rotated, said motion acting along the plane parallel to the axes of said circular gear set and bisecting the distance between said axes.