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:
Jun. 07, 2011
Filed:
Dec. 15, 2006
Applicants:
Harold Woodruff Tomlinson, Jr., Ballston Spa, NY (US);
John Erik Hershey, Ballston Lake, NY (US);
Jeffrey Michael Fries, Lee's Summit, MO (US);
Inventors:
Harold Woodruff Tomlinson, Jr., Ballston Spa, NY (US);
John Erik Hershey, Ballston Lake, NY (US);
Jeffrey Michael Fries, Lee's Summit, MO (US);
Assignee:
General Electric Company, Schenectady, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B61L 25/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a jointless track system, passive signaling devices ('PSDs') are coupled to a railroad track. The PSDs are used to optimize the amplitude, modulation, coding, and frequency of waveforms that are applied to the track (by signaling points) for at least three track circuit functions: detecting trains, detecting broken rails, and communicating between the signaling points and PSDs.