This 1996 image depicted a person turning on an articulated-arm desk lamp by using the palm of her hand, and pressing against the top of the lamp, at which point she's able to rotate the large, knurled disk, which is connected to the switch itself. The large size meant that people with limited grasp, or hand strength could activate such a switch with minimal effort. It also meant that less force was needed to turn the lamp on or off. This added feature would make the user's activity a relatively effortless experience. 'The Center for Universal Design (CUD) is a national research, information, and technical assistance center that evaluates, develops, and promotes accessible and universal design in housing, buildings, outdoor and urban settings and related products.'
CDC/ Richard Duncan, MRP, Sr. Proj. Mngr, North Carolina State University, The Center for Universal Design (CUD)
November 3, 2012