Abstract: A switching element of foil construction is presented, with a triggering layer of first resistive material applied to a first carrier-foil and a sensor layer of a second resistive material applied to a second carrier-foil. The two carrier-foils are arranged a certain distance from each other by means of spacers, in such a way that the triggering layer and the sensor layer are opposite each other and, when the switching element is not operated, are not in contact with each other, whereas, when the switching element is triggered, the triggering layer and the sensor layer are initially in contact with each other at a first point of their surface, and the area of contact increases as the pressure on the switching element is increased.

Abstract: A pressure sensitive area sensor having a two-dimensional support structure which is made up essentially of flexible strips and of several pressure-sensitive switching elements which are distributed over the area of the supporting structure, with the switching elements being connected to each other by connecting means. The pressure-sensitive switching elements are supported, at least where the supporting structure is subjected to large three-dimensional deformations, by free-standing projections of the connecting strips.