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:
Sep. 16, 1980
Filed:
Apr. 30, 1979
Applicant:
Inventor:
Anthony E English, Carson, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G09B / ;
U.S. Cl.
CPC ...
35 43 ; 35 49 ; 272 / ;
Abstract
Disclosed herein is a device conformed as a cylindrical structure having a bore axially bending partly therethrough, the end surface around the bore being coated with a phosphorescent coating and the bore surfaces being coated with black paint. By virtue of these coatings and the relative reflection coefficient thereof, a substantially true visual impression is created duplicating the appearance of a black hole in space. Thus the device may be used as a teaching aid assisting the user in the visualization of a complex physical phenomenon.