Improved apparatus for obtaining moving colour effects suitable for advertising, displaying and the like

摘要

176,141. Morley, V. S. Dec. 1, 1920. Addition to 150,896. Drawings to Specification. Optical and like toys.-The apparatus for obtaining moving colour effects described in the parent Specification is modified by forming one or more of the internal faces of the casing as mirrors which may be plane, convex, concave, or distorted.