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:
Dec. 28, 1999
Filed:
Sep. 19, 1997
Applicant:
Inventor:
James B Balliet, Webster, NY (US);
Assignee:
General Railway Signal Corporation, Rochester, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
714807 ;
Abstract
A numerical vital relay driver serving as an independent arbiter of vital railway (control) system operation constituting a checkword translator for receiving system checkwords from a system processor in the form of 'N' bit NISAL parameters and for implementing a hardware algorithm utilizing the checkwords. It also consists of variable waveform data tables, including means for translating the data in the tables into a periodic signal, wherein it is insured that only if the checkwords are present and correct within a specific check period and the operation of the hardware algorithm is correct, will the desired periodic signal be produced.