(under subclass 37) Subject matter for checking dimensions, shape or size of an object, or the spacing of selected portions thereof, having at least one unit for the direct application of fluid pressure thereto and utilizing the escape of fluid about the specimen as an index of its dimension, shape, size or spacing.
SEE OR SEARCH CLASS
33, Geometrical Instruments,
556+, and 700+ for processes and apparatus for determining size or dimension by means of a mechanical contact or feeler which in turn influences the fluid flow, pressure or volume of indicating means.
