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:
Aug. 03, 1976
Filed:
Aug. 19, 1974
Robin A Arnott, Windsor, CA;
John F Domaracki, Windsor, CA;
International Tools (1973) Ltd., Windsor, CA;
Abstract
A roadway marker having a housing with a base for engagement with the surface of a roadway, and a reflective wall for reflecting light from vehicles on the roadway. The reflective wall has a central plane extending at an acute angle from the base and is integrally formed with a plurality of spherical reflector elements arranged in side by side relationship. Each of the spherical reflector elements has its center located on the central plane with the portions of the spherical reflector elements that project from one side of the central plane defining an outer, light receiving surface and the portions of the spherical reflector elements that project from the other side of the central plane defining an inner, light reflecting surface of the reflective wall. The reflective wall may be formed by a separate reflector that is mounted in the housing as an insert. Also disclosed is a method of making such structures which includes the steps of assembling a plurality of pins having semi-spherical ends into a pin bundle, forming an electroform having a mold surface with semi-spherical depressions complementary to the semi-spherical ends of the pin bundle, and disposing a pair of such electroforms in molding apparatus with the mold surfaces in opposed relationship to define a cavity therebetween. The cavity is filled with light transmitting synthetic resin to form the reflector.