Abstract: A slope-matched stylus (SMS) tool for Incremental Sheet Forming (ISF) of a sheet includes a shaft connected to a stylus body and to a multi-axis drive mechanism. The stylus body has a conical or generally frustoconical form which includes a tool surface defining one or more corresponding tool wall angles. The tool wall angle range matches one or more part wall angles of a part formed via the ISF process, such that a flat line of contact exists between the stylus body and sheet. The tool and part wall angles are complementary. A system includes the tool and drive mechanism. A method includes securing the sheet to a fixture, connecting the tool to the drive mechanism, and progressively pressing a tool surface of the stylus body into or against the sheet using the drive mechanism, controlling the latter to ensure a flat line of contact is provided between the stylus body and sheet.

Abstract: Convertible armrests and seat assemblies that utilize convertible armrests. In one embodiment, a convertible armrest includes an armrest body connected to a seat frame between adjacent seats, a first arm pad coupled to the armrest body, and a second arm pad coupled to the armrest body. In a contracted configuration, the first arm pad and the second arm pad are stacked. In an expanded configuration, the first arm pad and the second arm pad are disposed side-by-side.

Abstract: Convertible armrests and seat assemblies that utilize convertible armrests. In one embodiment, a convertible armrest includes an armrest body connected to a seat frame between adjacent seats, a first arm pad coupled to the armrest body, and a second arm pad coupled to the armrest body. In a contracted configuration, the first arm pad and the second arm pad are stacked. In an expanded configuration, the first arm pad and the second arm pad are disposed side-by-side.