DREJEINDSTILLINGSKNAP TIL EN ELEKTRISK KOMPONENT I ET INSTALLATIONSAPPARAT,NAVNLIG ET AFBRYDERPOTENTIOMETER

The rotary control knob, for controlling light intensity or the speed of a machine etc., consists of a plastic ap with spring arms protruding back inwards from the inside surface of its front wall. The arms are grouped into two groups of two pairs. Each groupd accepts a replacement fuse. When a fuse blows in the equipment it can quickly be replaced by removing the knob from its shaft and taking out one of the fuses inside. Locating the replacement fuses inside the hollow control knob sves space. In another form the fuses are held by two plates folded up at their edges to form parallel spring flaps.