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:
Feb. 28, 2006
Filed:
Sep. 22, 2003
Applicants:
Hiroshi Taoka, Hitachinaka, JP;
Dai Watanabe, Hitachi, JP;
Noriharu Amiya, Hitachinaka, JP;
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G08G 1/01 (2006.01);
U.S. Cl.
CPC ...
Abstract
In an automatic train stop system in which a track circuitis divided into track circuit sectionsT,T andT, and a digitized train control information telegram (ATS telegram)is transmitted through the track circuit sections on carriers having different frequencies, a carrier sensormounted on a trainreceives a carrier in the track circuitand detects a track circuit boundaryby detecting a level change of the carrier, whereby an onboard system grasps the position thereof and controls the trainbased on the information of the ATS telegram