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:
Feb. 24, 1981
Filed:
Jul. 16, 1979
Harold M Grinwald, Big Bend, WI (US);
Everbrite Electric Signs, Inc., South Milwaukee, WI (US);
Abstract
The segments of several 7-segment character displays are defined by elongated light distributors in the form of slots or a series of holes which are in a panel. A large area light source is located on the rear side of the panel. Rotatable opaque disks are interposed between the light source and characters. Each disk has an array of holes for transmitting light to predetermined ones of light pipes which lead to slot segments in one embodiment and which lead to the holes that define segments in another embodiment. When a disk is rotated, different groups of holes in the disks become aligned consecutively with the light pipes where they are used or with the panel holes to thereby illuminate selected character segments so they define a sequence of characters such as the numbers zero to nine. In a digital clock application, a synchronous motor drives a first disk in angular steps to define minutes at their rate of occurrence. The first disk drives a second disk and the second disk drives a third for defining tens of minutes and hours, respectively.