US Patent Issued to Otis Elevator on May 26 for "Device for testing function of contactors and apparatus for performing elevator function" (Chinese Inventors)

ALEXANDRIA, Va., May 26 -- United States Patent no. 12,638,505, issued on May 26, was assigned to Otis Elevator Co. (Farmington, Conn.).

"Device for testing function of contactors and apparatus for performing elevator function" was invented by Heping Qiu (Shanghai), Tongqiu Liu (Shanghai), Ming Yin (Shanghai), Tingting Wang (Shanghai), Hongliang Tian (Shanghai), Guoping Pan (Shanghai), Baoxiang Cen (Shanghai), Longwen Wang (Shanghai) and Lan Wang (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "A device for detecting a function of a contactor, the contactor is configured to short three-phase phase lines of an elevator motor together by closing contacts, the device including: a voltage signal source c...