At&t Bell Laboratories

American Telephone & Telegraph Co., At&t Bell Laboratories

Brian A Basarath

Robert J Kakalec

Harry K Ebert, Jr

Henry E Menkes

A rectifier plant controller is combined with a continuously operating feeder monitor option in order to provide feeder line data on demand. The feeder monitor option continuously monitor feeder lines selected by the rectifier plant controller and stores the data acquired in a memory accessible to both the feeder monitor option and the rectifier plant controller. The rectifier plant controller can recover the data upon request at any time.

Feeder monitor arrangement for stored program controlled rectifier plant

A signal coupling arrangement including a dual detector opto-isolator arrangement operative to transfer a sensed DC signal from an input to an output of an amplifying circuit with an isolated electrical system there between incorporates amplifiers having a specific gain set by unique calibration means and to initially preset the coupling circuitry amplification gains to assure a consistent DC current transfer and DC contrast ratio in coupling DC signals from the input to the output.

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Parsippany, NJ, United States of America

Brian A Basarath