Patent ID: 6285276
Filing Date: 2001-09-04
Classification: B66F,H01C,H01H,Y02T

Abstract:
A control device for controlling a function of an industrial truck, the control device comprising:a circuit element configured to generate a multi-stage electrical control signal for controlling a function of an industrial truck, the circuit element including:a substrate;a plurality of spaced contact points located on the substrate;a contact area located on the substrate and spaced from the plurality of contact points;a contact membrane spaced from the substrate and facing the contact points and contact area;a first slider movable over the contact membrane and configured to apply a pressure force to press the contact membrane against at least one contact point;a second slider movable over the contact membrane and configured to apply a pressure force to press the contact membrane against the contact area to electrically connect the at least contact point with the contact area, wherein the contact points are connected by electrical resistors; andmeans for pressing the first and second sliders against the contact membrane such that the magnitude of the pressure force exerted on the contact membrane by the first and second sliders is independent of the position of the sliders on the contact membrane.