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1. US20080183306 - Vital solid state controller

Office United States of America
Application Number 11964606
Application Date 26.12.2007
Publication Number 20080183306
Publication Date 31.07.2008
Grant Number 08028961
Grant Date 04.10.2011
Publication Kind B2
IPC
B61L 3/12
BPERFORMING OPERATIONS; TRANSPORTING
61RAILWAYS
LGUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
3Devices along the route for controlling devices on the vehicle or vehicle train, e.g. to release brake, to operate a warning signal
02at selected places along the route, e.g. intermittent control
08controlling electrically
12using magnetic or electrostatic induction; using radio waves
B61L 1/02
BPERFORMING OPERATIONS; TRANSPORTING
61RAILWAYS
LGUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
1Devices along the route controlled by interaction with the vehicle or vehicle train
02Electric devices associated with track
G05B 19/18
GPHYSICS
05CONTROLLING; REGULATING
BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
19Programme-control systems
02electric
18Numerical control (NC), i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
Applicants Central Signal, LLC
Inventors Ashraf Ahtasham
Baldwin David
Agents Sylke Law Offices, LLC
Sylke C Thomas
Title
(EN) Vital solid state controller
Abstract
(EN)

A vital programmable logic device (VPD) is provided having at least two microprocessors. The VPD is configured to provide failsafe operation of a vital control system while operating in a closed circuit environment. In at least one embodiment of the present invention, railroad grade crossing signals are controlled by the VPD.