ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,479,043, issued on Nov. 25, was assigned to Hubbell Inc. (Shelton, Conn.).
"Arc ignition system for exothermic welding apparatus" was invented by Jayaraj Ramasamy (Chennai, India) and K Sundharavadivel (Chennai, India).
According to the abstract* released by the U.S. Patent & Trademark Office: "The ignition system holds a quantity of a reaction mixture in a hopper. The hopper is closed at the bottom by a movable gate. When the gate is opened, powder falls from the hopper, though a passage, and through an ignition chamber. High voltage electrodes are provided in the ignition chamber. As the powder falls through the ignition chamber, the electrodes are energized, generating an electric...