Otis Elevator Company

Fred R Spielman

Vijay Jayachandran

Goldino Alves

Dave Jarvis

John J Kriss

Loren D Fanion

Daniel R Greer

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 escalator step () includes a sound barrier material () covering over at least a portion of an inner surface () of a tread portion() and an inner surface () of a rise portion (). In one example, the sound barrier material () comprises a sheet of vinyl. The sound barrier material () reduces noise radiation from the step () toward a cavity () within a passenger conveyor support structure () and reduces noise emanations from the cavity () through the steps (). Several embodiments for securing the sound barrier material () in place are disclosed.

Passenger conveyor step having an acoustic barrier

Growing community of inventors

Somers, CT, United States of America

Fred R Spielman