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:
Oct. 04, 2011
Filed:
Oct. 22, 2007
Thomas G. Donich, Seeley Lake, MT (US);
Paul F. Kulik, Seattle, WA (US);
David B. Kelley, Normandy Park, WA (US);
Richard J. Fulthorp, Renton, WA (US);
Dale K. Smith, Renton, WA (US);
Thomas G. Donich, Seeley Lake, MT (US);
Paul F. Kulik, Seattle, WA (US);
David B. Kelley, Normandy Park, WA (US);
Richard J. Fulthorp, Renton, WA (US);
Dale K. Smith, Renton, WA (US);
MeteorComm, LLC, Renton, WA (US);
Abstract
An interface device for interfacing a set of wayside systems with a radio transmitter includes a plurality of input ports each having at least one input for receiving a signal representing a state of a corresponding wayside system and first and second parallel data paths coupled to the plurality of input ports. Each data path includes input protection circuitry coupled to the inputs of the input ports for preventing short-circuit and open-circuit conditions from triggering a false input state, a multiplexer for selecting between the input port; and a processor for scanning the input ports with the multiplexer to determine the state of current signals appearing at the inputs. In response to determining the state of the current signals appearing at the inputs, the processor generates a message communicating a current state of the wayside systems for delivery to the radio transmitter.