Abstract: A first intermediate direct voltage is generated from a current source or board voltage, and a second sinusoidal intermediate alternating voltage is generated with a current inverter. This intermediate alternating voltage is transformed by one or more transfer systems to the various triggering and maintaining voltages of different cold cathode discharge lamps. Frequency-synchronous dimming is regulated by the pulse-pause ratio of a pulse group regulator in a broad frame by optically commanded triacs which are triggered in the zero crossing. The preconditions for the starting and maintenance characteristics of the lamps are thus always ensured.

Abstract: A dispenser for textile hand towelling web is disclosed in which towelling is dispensed over a rotatable dispensing roller which is blocked each time after the dispensation of a predetermined length of fresh hand towelling. The dispenser also comprises an arrangement operable by an electric motor for drawing used hand towelling in. In a dispenser of this kind a measuring and control arrangement is provided for each time preventing release of the blocked dispensing roller at least until a predetermined minimum length of used hand towelling, corresponding to a major part of the length previously dispensed over the dispensing roller and possibly also by the drawing-in arrangement, has been drawn in. The said measuring and control arrangement may include, in engagement with the used towelling which is drawn in, a roller for measuring the length of drawn-in towelling, for example by counting each time the number of rotations of this roller.