Patent ID: 6667738
Filing Date: 2003-12-23
Classification: G06F,H01H,H04M

Abstract:
A touch screen overlay apparatus for use in association with a user input apparatus having a touch screen with a rigid contact surface with one or more indicia displayed thereon, said contact surface having a periphery with a top edge, a bottom edge, a left edge and a right edge, said touch screen being disposed within a housing, said touch screen overlay apparatus comprising:a membrane of a size sufficient to cover one or more desired ones of said one or more indicia displayed on said rigid contact surface, said membrane being formed of a flexible material, said membrane has a left edge region and a right edge region; and means for removably maintaining said membrane in a predetermined position in which said membrane is superimposed on at least said desired ones of said one or more indicia, said means for removably maintaining said membrane in a predetermined position comprising: a first series of holes located in said left edge region of said membrane; a second series of holes located in said right edge region of said membrane; a left sprocket having teeth that engage said first series of holes; a right sprocket having teeth that engage said second series of holes; and means for rotating said left and right sprockets simultaneously at the same rate of rotation.