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:
Nov. 23, 1993
Filed:
Feb. 13, 1992
Applicant:
Inventors:
Michael E Colbaugh, Levelgreen, PA (US);
Raymond C Franke, Glenshaw, PA (US);
Assignee:
Union Switch & Signal Inc., Pittsburgh, PA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B61L / ;
U.S. Cl.
CPC ...
246 / ; 2461 / ; 246194 ;
Abstract
A railway vehicle cab signalling system providing electrical signals to operate an aspect display unit or the like located on-board a railway vehicle based upon the track circuit signals typically used to operate wayside indicators. A sensor detects the track circuit current as it passes through at least one wheel and axle set on the vehicle. A processor receives an output signal from the sensor and produces a signal to operate the aspect display unit.