Otis Elevator Company

John J Kriss

Tahany Ibrahim El-Wardany

Andrzej Ernest Kuczek

Daniel R Greer

John M Milton-Benoit

Boris G Traktovenko

James M Draper

Xiaodong Luo

David R Polak

John J Ferrisi

Shihemn Chen

Harry Terry

Aayush Desai

Joe J Liou

Loren D Fanion

Dave Jarvis

Robert Hammell

Fred R Spielman

Kevin Gleason

Ken Woronoff

Duan Liang

Patricia L O'Coin

An elevator safety system () includes a limit switch () coupled to a first elevator car () and an actuator plate () coupled to a governor rope () of a second elevator car (). The actuator plate trips () the limit switch () when a distance between the first elevator car () and the second elevator car () goes below a safety threshold distance to stop the first and second elevator cars ().

Elevator safety system and method

An elevator system () includes an underslung car (). A plurality of load bearing members (-) are closer together behind the elevator car and spaced farther apart near a front of the elevator car (). A plurality of sheaves (-) are supported for vertical movement with the car and rotational movement relative to the car () such that the load bearing members (-) can be arranged in a 2:1 roping ratio and extend underneath the car (). A disclosed example includes sheaves (-) rotatable about sheave axes that are at oblique angles relative to corresponding edges of the elevator car ().

Elevator car having an angled underslung roping arrangement

Growing community of inventors

East Hampton, CT, United States of America

John J Kriss