Otis Elevator Company

Terry M Robar

William A Veronesi

Paul A Stucky

Jack F Gieras

Richard J Ericson

Anthony Cooney

Samuel C Wan

Vlad Zaharia

Richard R Polacek

Richard W Calcasola

Jack Mansfield Thompson

Satish P Patel

Dave C Jarvis

A method and system for detecting or measuring defects in an elevator rope having electrically conductive tension members, whereby measured electrical resistance in the tension members is indicative of defects.

Method and apparatus for detecting elevator rope degradation using electrical resistance

A method and system for detecting or measuring defects in a rope having ferromagnetic tension members includes a magnetic field exciter and an array of magnetic flux sensors corresponding to the tension members in a known relationship. Measurements of magnetic flux leakage are indicative of defects. Another aspect of the invention includes a method and system for detecting or measuring defects in an elevator rope having electrically conductive tension members, whereby measured electrical resistance in the tension members is indicative of defects.

Method and apparatus for magnetic detection of degradation of jacketed elevator rope

A cab having a wheeled carriage fixed thereto is moved between rails on an elevator car frame and similar rails on a wheeled bogey. The ends of the rails are scarfed in a complimentary fashion so as to provide a temporary half-lap joint between the rails of the bogey and the rails of the car frame. Motion is provided by linear motors having active primaries disposed on the car frame and the bogey and passive secondaries disposed on the cab carriage. Motor control is in response to position signals provided by magnetostrictive linear displacement transducers. The cab carriage includes rollers on vertical axes which contact the insides of the rails for guidance. The cab carriage wheels and rollers are disposed in pairs separated sufficiently so that at least one roller and one wheel of each pair is in contact with a full rail as the carriage crosses the rail joints between the car frame and the bogey. Wheels coated with urethane reduce wheel noise and tapers at the ends of the rails provide smooth rail to rail transitions.

Linear motor transfer of cab horizontally between elevator and bogey

Growing community of inventors

Canton, CT, United States of America

Terry M Robar