Abstract: In an electrode combination for a radiation head for the generation of electromagnetic radiation comprising an anode means having a tip end component and a cathode means, the tip end component comprising a material able to facilitate, in response to a predetermined pulse voltage applied between the anode means and cathode means, the generation of electromagnetic radiation, the improvement wherein the electrode combination comprises a trigger electrode, the tip end component, the cathode means and the trigger electrode being spaced apart from each other by a respective predetermined distance.

Abstract: An adjustable suspension for attaching a piece of furniture to a wall includes a housing having an elongated supporting arm projecting therefrom. The upper edge of the arm is provided with a rough, preferably toothed, surface which engages a protrusion within the housing having a cooperating similar surface; and the lower edge of the supporting arm is provided with a rough, preferably toothed surface which cooperates with a rotatable cam in the housing having a similar surface. By moving the arm in translation through the region between the cam and protrusion, and by rotating the cam, the free end of the arm outside of the housing may be adjusted in both height and depth relative to the housing.