PTL's Centurion series was introduced to the elevator industry in the early 1970's. At that time a revolutionary design was required. The day to day rigors of button operation within the New York Housing Authority system demanded it and PTL engineering was up to the challenge.rnThe positive stop concept was developed, tested, manufactured and installed in short order. Due to the overwhelming success of its early operation, Centurion was quickly elevated to benchmark status for tamper proof button construction.
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