(under subclass 79) Subject matter wherein a shadow image of an article is projected on the viewing screen.
(1) Note. In this subclass the structure relating the projector and viewing screen may be parts of a machine tool. However, where specific structure of the machine tool is claimed, classification elsewhere, depending on the type of machine tool, see the Search Class Notes below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
62, for devices which project a shadow image of a stencil or perforated plate.
SEE OR SEARCH CLASS
81, Tools. See (1) Note above.
82, Turning. See (1) Note above. 83, Cutting. See (1) Note above.
356, Optics: Measuring and Testing, for devices which are used to compare a profile with a standard.
408, Cutting by Use of Rotating Axially Moving Tool,
16, for profile projectors in combination with machine tools. See (1) Note above.
409, Gear Cutting, Milling, or Planing. See (1) Note above.
