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1. US20120132758 - Vital solid state controller

Office United States of America
Application Number 13249929
Application Date 30.09.2011
Publication Number 20120132758
Publication Date 31.05.2012
Grant Number 08469320
Grant Date 25.06.2013
Publication Kind B2
IPC
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
CPC
B61L 29/28
BPERFORMING OPERATIONS; TRANSPORTING
61RAILWAYS
LGUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
29Safety means for rail/road crossing traffic
24Means for warning road traffic that a gate is closed or closing, or that rail traffic is approaching, e.g. for visible or audible warning
28electrically operated
B61L 29/22
BPERFORMING OPERATIONS; TRANSPORTING
61RAILWAYS
LGUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
29Safety means for rail/road crossing traffic
08Operation of gates; Combined operation of gates and signals
18Operation by approaching rail vehicle or rail vehicle train
22electrically
B61L 29/282
BPERFORMING OPERATIONS; TRANSPORTING
61RAILWAYS
LGUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
29Safety means for rail/road crossing traffic
24Means for warning road traffic that a gate is closed or closing, or that rail traffic is approaching, e.g. for visible or audible warning
28electrically operated
282magnetic or inductive control by the vehicle
Applicants Baldwin David
Central Signal, LLC
Ashraf Ahtasham
Inventors Baldwin David
Ashraf Ahtasham
Agents K&L Gates LLP
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.