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:
Nov. 23, 1993
Filed:
Jul. 01, 1991
Ronald G Cox, Cedarville, IL (US);
Marvin D Karg, Freeport, IL (US);
Honeywell Inc., Minneapolis, MN (US);
Abstract
An annunciator apparatus has a light directing device that efficiently causes light to pass from a light source, such as a lamp, toward a generally flat surface of the light directing device in an efficient manner. The light pipe of the annunciator incorporates parabolic rear surfaces that are reflective. In addition, discs of partially reflective and partially transmissive material are disposed directly between a light source and the preselected plane toward which light is directed perpendicularly. The annunciator comprises an indicia plate which incorporates layers to accomplish the desired effect of having a reduced reflection characteristic. Indicia are represented on front and back surfaces of a substrate and aligned with each other to define a 'pinhole' effect that significantly reduces light reflected back from the light directing device toward the viewer.