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:
Nov. 26, 2013
Filed:
Jul. 19, 2010
Applicant:
Brian Joseph Hogan, Temecula, CA (US);
Inventor:
Brian Joseph Hogan, Temecula, CA (US);
Assignee:
Siemens Rail Auotmation Corporation, Louisville, KY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B61L 21/10 (2006.01); B61L 23/16 (2006.01);
U.S. Cl.
CPC ...
Abstract
An overlay track circuit is used to transmit information through a block of railroad tracks. In one embodiment, one of a plurality of codes assigned to a receiver/transmitter pair are used to represent each information segment (which may be one or more bits) of an information signal. In another embodiment, bits of the information signal are transmitted between periodic repetitions of a code associated with the transmitter/receiver pair. The modulation may be performed using a frequency shift key technique. Track circuits may be connected to relay information between adjacent blocks of track.