US PATENT SUBCLASS 355 / 58
.~.~.~ Including a cam or a screw with nonuniform pitch

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


355 /   HD   PHOTOCOPYING

18  DF  PROJECTION PRINTING AND COPYING CAMERAS {27}
55  DF  .~ Focus or magnification control {4}
56  DF  .~.~ Automatic or semiautomatic focusing when varying image size {2}
58.~.~.~ Including a cam or a screw with nonuniform pitch {1}
59  DF  .~.~.~.~> And an indicator or scale

DEFINITION

Classification: 355/58

(under subclass 56) Subject matter including a sliding or rotating piece that imparts motion to a pin free to move in a groove on its face or to a roller moving against its edge, or including a screw having threads of nonuniform pitch; to aid in moving the lens, original, and photosensitive paper relative to each other.