Abstract: A method for charging an energy storage device for use in a cleaning appliance includes the following steps: reading an energy demand signal representative of an energy required by the cleaning appliance for a predetermined cleaning run; and outputting a charging signal using the energy demand signal, the charging signal causing the energy storage device to be charged as a function of the energy required.

Abstract: A method for charging an energy storage device for use in a cleaning appliance includes the following steps: reading an energy demand signal representative of an energy required by the cleaning appliance for a predetermined cleaning run; and outputting a charging signal using the energy demand signal, the charging signal causing the energy storage device to be charged as a function of the energy required.

Abstract: A bagless vacuum cleaner includes a dust container including a chromogenic material so as to have a controllable transparency.

Abstract: In an electric connector on a printed circuit board that features a connector part acted upon with relatively high electric voltage values, sparkovers between the continuing strip conductors arranged on the printed circuit board and the soldering points of the electric contacts are prevented by providing a snap-on element with several chamber in the connector part, wherein the chamber walls of this snap-on element can be inserted into slots arranged in the printed circuit board, and wherein the chambers respectively enclose the soldering point of one of the electric contacts in the connector part.

Abstract: In an electric connector on a printed circuit board (20) that features a connector part (1) acted upon with relatively high electric voltage values, sparkovers between the continuing strip conductors arranged on the printed circuit board and the soldering points (22) of the electric contacts (8) are prevented by providing a snap-on element (10) with several chambers (13) in the connector part (1), wherein the chamber walls (12) of this snap-on element can be inserted into slots (23) arranged in the printed circuit board (20), and wherein the chambers respectively enclose the soldering point of one of the electric contacts in the connector part.

Abstract: In a photosensitive semiconductor diode device (1), in particular, a PIN diode device (2) for converting optical signals into electronic signals, the semiconductor diode is provided with a lead for contacting the doped regions and for electroconductively connecting them to a following circuit (11), e.g., an electronic amplifier. To realize a matching between the semiconductor diode and the following circuit that is effective over a wide bandwidth by means of a passive matching circuit (10), the lead contains the matching circuit such that lead (4, 5) is constructed on at least part of its length (L) as a coplanar line or a microstrip line such that conductor width (S) and/or conductor spacing width (gap width W) varies along its length area (L) of the lead, with the characteristic impedance of this lead varying along the corresponding part of the line. A very high operating frequency and a low signal attenuation are thereby achieved, among other things.