Patent ID: 7777139

Claim:
A switching device for opening and closing an electric circuit, the switching device comprising: a neutral conductor having a first end and a second end; and a frame through which the neutral conductor is configured to pass, wherein the neutral conductor comprises a movable middle portion that is arranged for breaking the neutral conductor inside the frame, wherein the movable middle portion has a first end and a second end, is movable with respect to the first and second ends of the neutral conductor, and is located between the first and second ends of the neutral conductor, wherein the switching device further comprises pressing means for pressing the movable middle portion against the first and second ends of the neutral conductor, wherein the pressing means comprise: a first screw member for the first end of the movable middle portion; and a second screw member for the second end of the movable middle portion, wherein the first and second screw members each comprise a threaded portion and a head portion, and wherein, for each one of the first and second screw members, a diameter of the head portion is larger than a diameter of the threaded portion.