Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
William L. Henry0
Stephen V. Kilgore0
Date of Patent
August 18, 2009
0Patent Application Number
108872930
Date Filed
July 8, 2004
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A vital proximity detection mechanism and method for reliably determining and communicating the position of a railroad switch point relative to a normal fixed track and a reverse fixed track, wherein the mechanism includes substantial component redundancy and fault-checking features and otherwise meets promulgated safety standards for vital componentry. The mechanism includes an RF transmitter and remote status indicator unit to allow for remote adjustments of proximity sensors while monitoring the effects of such adjustments.
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