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:
Oct. 21, 2003
Filed:
Mar. 12, 2002
Gary A. Carr, Fairfax, VA (US);
Christian Diaz, Fairfax, VA (US);
Jeffrey Bloom, Silver Spring, MD (US);
Ensco, Inc., Springfield, VA (US);
Abstract
A method and apparatus for measuring the geometry of a rail for a railroad track which includes mounting first and second cameras in back to back relationship to create a single camera axis passing through the camera lenses and to define a coordinate system with an origin centered between the cameras on the camera axis. First and second targets are placed on the rail to be measured and spaced an equal distance from the origin between first and second cameras respectively. The first and second cameras record the position of the first and second targets and provide position signals from which the mid-chord value of a chord extending between the first and second targets is computed.