US Patent 11643273 Roller brake

A roller brake comprising: (a) a roller shaft that supports one or more ends of the roller brake; (b) a roller tube extending over all or a portion of the roller shaft; (c) a magnet; (d) a conductor located opposite the magnet and the conductor being in communication with the roller shaft when the magnet is in communication with the roller tube and the conductor being in communication with the roller tube when the magnet is in communication with the roller shaft; and (e) an air gap separating the magnet and the conductor; and wherein the conductor includes one or more recesses that are an absence of material in the conductor.