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. 21, 1993
Filed:
Mar. 02, 1992
Applicant:
Inventors:
Robert I Hochman, Pittsford, NY (US);
William A Petit, Spencerport, NY (US);
Assignee:
General Railway Signal, Rochester, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B61L / ;
U.S. Cl.
CPC ...
246 / ; 34082564 ; 34082557 ; 2461 / ;
Abstract
A railway signalling system uses coded electrical information signals to convey vital signal information to wayside signal locations. The coded information signals are in the form of unipolar three-pulse DC signals capable of being sent or received during a 1.4 second transmission or receiving cycle. The system establishes greater signalling capability than prior systems which used only a two-pulse DC signal.