US Patent Issued to Otis Elevator on Feb. 17 for "Controlling system for safety, a controlling method for safety, a safety switch and an escalator system" (Chinese Inventors)

ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,552,643, issued on Feb. 17, was assigned to Otis Elevator Co. (Farmington, Conn.).

"Controlling system for safety, a controlling method for safety, a safety switch and an escalator system" was invented by Haizhong Zhong (Hangzhou, China), Huajia Guo (Tianjin, China) and Yijun Guo (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "A safety control system includes: a plurality of safety switches connected in series to form a safety circuit; a plurality of wireless communication modules, each wireless communication module is associated with at least one of the safety switches, such that each of the wireless communication modules is configured to a si...