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. 24, 2009
Filed:
Nov. 08, 2006
Gerhard Wilms, Braunschweig, DE;
Gerhard Wilms, Braunschweig, DE;
Siemens Aktiengesellschaft, München, DE;
Abstract
A method for controlling railway signal installations of a railway system by exchanging data between directly adjacent transceivers over electrically conducting rails of a track is disclosed. More particularly, the method allows bidirectional data exchange between the transceivers without employing track sections with insulating joints. Data are exchanged during alternating transmit and receive cycles which each have three separate time intervals. Signal pulses are received at the transceivers either depending on their polarity during the transmit and receive cycles, or the signal pulses are prepended with an identification pulse. In this way, only one transceiver is enabled to transmit and only one receiver is enabled to receive the transmitted signal pulses in a given time interval.