ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,481,246, issued on Nov. 25, was assigned to NIVAROX-FAR S.A. (Le Locle, Switzerland).
"Barrel for timepiece" was invented by Gerard Vorpe (Le Locle, Switzerland), Laurent Jeanneret (Villers-le-lac, France) and Pierre Cusin (Villars-Burquin, Switzerland).
According to the abstract* released by the U.S. Patent & Trademark Office: "A barrel (1) for self-winding timepiece including a drum (11) provided with an inner lateral wall (12) and a mainspring (2) forming a winding including an outer coil (21) the end (22) of which is friction coupled with the inner lateral wall and free to slip against the inner lateral wall in the event of overtension of the mainspring (2). The end of the outer ...