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:
Jan. 11, 2000
Filed:
Sep. 02, 1997
Vincent Ferri, Pittsburgh, PA (US);
Robert D Dimsa, Elizabeth, PA (US);
Westinghouse Air Brake Company, Wilmerding, PA (US);
Abstract
A circuit for diagnosing component problems in the circuit and for immediately recognizing an emergency brake application command in a locomotive. The circuit includes a coil of an emergency magnet valve connected to a trainline providing positive DC voltage to the coil and circuit, and a diode connecting the coil to a switch of a brake handle and to a light emitting device. The brake handle switch and light emitting device are connected to the negative side of the trainline, with the light emitting device providing an immediate indication of an emergency brake application command effected by the closing of the brake handle switch.