The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 08, 1976
Filed:
Nov. 18, 1974
Edward A Sampon, Milwaukee, WI (US);
Everbrite Electric Signs, Inc., South Milwaukee, WI (US);
Abstract
Two panels each having an opaque background with an array of transparent dots therein are superimposed in front of a light source. The array of transparent dots in one panel is arranged to form a rectangular grid while the transparent dots in the other panel are positioned along the diagonal lines of the rectangular grid. Three transparent dots are positioned along the diagonal line between diagonally opposite pairs of transparent dots on the rectangular grid. The transparent dots along the diagonal lines are arranged to form three separate patterns, each of which may be a letter, a word or group of words, a picture, or a design. One of the panels is periodically reciprocated along the diagonal lines relative to the other panel, which causes the three separate patterns to be illuminated in sequence, each illuminated pattern being extinguished before the next pattern is illuminated. Illumination occurs when the transparent dots forming the pattern register with the transparent dots of the rectangular grid, thus allowing light to pass through the registered dots.