Complex sentence: Cybex International was founded in the late 60's as "The Cybex Ergometer Company" in Ronkonkoma, New York, by John McCarthy, as a division of Lumex, which was traded publically on the American Stock Exchange.
Split into simpler sentences: Cybex International was founded in the late 60's as "The Cybex Ergometer Company" in Ronkonkoma, New York. It was acquired by Lumex, which was traded publically on the American Stock Exchange.