Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With voltage or current conversion
Patent
1986-02-14
1989-02-14
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With voltage or current conversion
324158MG, 340 47, 340 52F, 246182B, 246182R, G01R 1918, G08B 2100, G06F 1548
Patent
active
048049107
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.
REFERENCES:
patent: 3809985 (1974-05-01), Krause et al.
patent: 4173732 (1979-11-01), Anderson
patent: 4327391 (1982-04-01), Grzebielski
patent: 4413325 (1983-11-01), Elfner et al.
patent: 4417229 (1983-11-01), Wilson
patent: 4495578 (1985-01-01), Sibley et al.
patent: 4498077 (1985-02-01), Richardson
patent: 4735385 (1988-04-01), Nickles et al.
Eisenzopf Reinhard J.
Lidd Francis J.
Nguyen Vinh P.
Vapor Corporation
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