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:
Apr. 09, 1991
Filed:
Jun. 12, 1989
Applicant:
Inventor:
John W Parker, Rochester, NY (US);
Assignee:
General Signal Corporation, Rochester, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ; H03D / ;
U.S. Cl.
CPC ...
36442605 ; 36442601 ; 2461 / ; 2461 / ; 375103 ;
Abstract
This invention relates to cab signalling systems that receive various permissible maximum speed signals and decode the maximum speed signal to inform the engineman of a train of the current maximum safe speed that a train may travel. The apparatus of this invention accomplishes the foregoing by utilizing a single digital filter and a microprocessor to decode the various transmitted maximum speed signals and to verify that the decoded maximum speed signal represents one of the permissible maximum safe speeds.