ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,424,839, issued on Sept. 23, was assigned to Schneider Electric USA Inc. (Boston).
"Solenoid-based voltage imbalance protection" was invented by Chad R. Mittelstadt (Cedar Rapids, Iowa).
According to the abstract* released by the U.S. Patent & Trademark Office: "Apparatuses and methods herein provide a voltage imbalance detector that employs two solenoid coils, each coil coaxially arranged around a slidable metal plunger on opposite sides thereof. One coil is electrically connected to one line of a 120 V/240 V power supply and to neutral, while the other coil is electrically connected to the other line of the 120 V/240 V power supply and to neutral. When the coils are energized by c...