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:
Apr. 28, 2009
Filed:
Sep. 08, 2005
Jonathan David Francis, Chippenham, GB;
Paul Robertshaw, Hatfield, GB;
Jonathan David Francis, Chippenham, GB;
Paul Robertshaw, Hatfield, GB;
Westinghouse Brake and Signal Holdings Limited, Wiltshire, GB;
Abstract
A train detection mechanism for detecting the presence of a train on a section of track, the track section including first and second railsand delimited by first and second ends thereof, includes current injector for injecting current into the first rail at the first end of the section and current receiver for receiving current from the second rail at the first end of the section, and a shuntconnected between the first and second rails at the second end of the section, characterized in that the shunt includes a switchfor controlling current flow through the shunt, the switch being operable by the passage of a train.