ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,461,156, issued on Nov. 4, was assigned to Rockwell Automation Technologies Inc. (Mayfield Heights, Ohio).

"Detecting welded relay contacts using spanner voltage measurement" was invented by David Elmiger (Hitzkirch, Switzerland), Kyle B. Adkins (Oak Creek, Wis.), Andrew E. Carlson (Franklin, Wis.) and David M. Messersmith (Kenosha, Wis.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A system includes a relay system and a controller. The relay system includes a plurality of relays, each having a first contact on an input side of the respective relay, the input side coupled to a power source, a second contact on a load side of the respective relay coupled...