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:
Mar. 20, 1979
Filed:
Feb. 22, 1977
Applicant:
Inventor:
Peter M Noble, Valencia, PA (US);
Assignee:
Westinghouse Air Brake Company, Swissvale, PA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F21V / ;
U.S. Cl.
CPC ...
356123 ; 316 23 ; 356255 ; 362285 ;
Abstract
An optical instrument for locating the focal point of a smooth surface concave reflector of a signal lamp unit. The optical instrument includes a cylindrical metallic base member for insertion into the electrical socket of a light bulb. A translucent sighting target member is carried by the base member and includes a reticle for focusing in a distant image whereby the filament of a light bulb will be located at the focal point of the concave reflector for maximizing the illuminative efficiency of the signal lamp unit.