Abstract: A resectoscope having an electrode longitudinally displaceable in a stem. The electrode is electrically contacted at its proximal end 31, in a carriage that is fitted with a down-pointing finger grip, by a contacting system. The resectoscope further includes an hf-power cable 15 affixed to and suspended from the carriage. The contacting system is a separate reversal device affixable in the distal direction selectively by either of its two ends to the carriage. The particular distal end being fitted with a recess to receive the electrode and a cable post 13 is situated nearer one of the ends.

Abstract: A rotary drive device for a flat object which is transported by a conveyance means to a processing station. At the processing station the object is rotated about an axis orthogonal to its surface extension by the rotary drive device. The rotary drive device includes a receptacle for the object and an axially projecting guidance means which cooperates with a hole in the object to center the object. When the object is positioned on the conveyance means above the receptacle, the object can be connected to the receptacle free of rotational play by a releasable fixation means. The receptacle is arranged on a rotatable plunger that can be moved back and forth so that elaborate pivoting and lowering motions of the conveyance means is not required.