ALEXANDRIA, Va., March 31 -- United States Patent no. 12,592,659, issued on March 31, was assigned to Foshan Carro Electrical Co. Ltd. (Foshan, China).
"Single live wired speed control circuit of ceiling fan motor" was invented by Jian-Sheng Zhang (Foshan, China) and Likui Xu (Foshan, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A single live wired speed control circuit of a ceiling fan motor includes a single live wire (SLW) electricity acquisition unit that is electrically connected to a live wire of an alternate current (AC) circuit, a chopper unit that is electrically connected to the live wire in series, and a control unit and a speed control unit that are electrically connected to each other. T...