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:
Feb. 14, 1989
Filed:
Feb. 14, 1986
Jack A Russell, Libertyville, IL (US);
Vapor Corporation, Chicago, IL (US);
Abstract
A traction load meter system for displaying information concerning the amount of current energizing electric motors which drive a locomotive. These motors have power and braking modes and have a continuous current rating. The system includes a current-to-frequency converter for providing an output signal having a frequency corresponding to the amount of current drawn by the motors. Electronic logic circuitry is included for receiving this output signal and being responsive thereto to provide outputs indicating whether the locomotive is in the power or braking mode, the amount of current being drawn, whether this amount is above the continuous rated current for the motors, and the period of time the above-rated condition has existed. Additionally, the meter system includes a display panel connected to the logic circuitry and adapted to be mounted in a cab of the locomotive for displaying to the engineer the aforementioned outputs of the logic circuitry.