Wheel dressing device

An improved wheel dressing device for generating a locus of curvature from a set of dressing parameters which include:

• a. a pair of base-carried supports;
• b. an angled cam bar biased against said supports;
• c. a pivot point on said cam bar;
• d. means to traverse said cam bar and pivot point in a first direction across said supports and the reverse, wherein the cam bar attitude varys so as to move said pivot point simultaneously in a second direction normal to said first direction;
• and
• e. a dressing stylus depending from said pivot point so as to trace out a locus of curvature in accordance with first and second directional components;
• wherein the improvement comprises:
• f. means to bias said supports to a first position so as to generate a first portion of a locus of curvature as said bar is traversed;
• and
• g. means to move one of said supports at one end of said first portion so as to generate a second portion of said locus of curvature as said bar continues traversal comprising:
• a. a pivotal link, carrying said one of said supports pivotally on said base;
• and
• b. a dog plate, carried by said cam bar, wherein as said cam bar is traversed relative to said base, said dog plate contacts said one of said supports, driving said support arcuately away from said first position and causing generation of said second locus portion as said cam bar continues traversal.