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John P Laforest DeceasedConesus, NY
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Conesus, NY
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Florence Holway
Following the assault, Holway incorrectly believed that her attacker, John LaForest, would automatically receive a lengthy sentence, but was shocked to learn ...
Us Patents
Alternating Current Track Circuits
US Patent:
4065081, Dec 27, 1977
Filed:
Dec 9, 1976
Appl. No.:
5/749144
Inventors:
Jerry P. Huffman - Churchville NY
John P. LaForest - Conesus NY
William A. Petit - Rochester NY
James A. Smith - Conesus NY
John P. LaForest - Conesus NY
William A. Petit - Rochester NY
James A. Smith - Conesus NY
Assignee:
General Signal Corporation - Rochester NY
International Classification:
B61L 2316
US Classification:
246 34R
Abstract:
Alternating current track circuits are provided for the several adjoining track sections of a stretch of railway track, each of the track circuits comprising an alternating current code transmitter and an alternating current code receiver connected to track rails at opposite ends of the associated section. Circuit apparatus including an alternating current line circuit extending along the stretch of railway track is provided for normally communicating alternating current from the line circuit through rails of the associated track sections, the alternating current being modulated at a selected rate code and current in any two adjoining track sections being of opposite instantaneous polarity for broken down joint protection. Phase sensing apparatus is provided at a receiving end of each track section including a comparator for comparing the rate code modulated alternating current communicated through the track rails with a steady reference source connected to the line circuit. A system including a flip-flop circuit and a low pass filter is provided for energizing a track relay only in response to a distinctive output of the comparator indicative of proper phase relationship of the current in the associated track section.
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