Abstract: A mounting tool for positioning a shaft sealing ring on a shaft against a curvature of a sealing lip of a shaft sealing ring, wherein the shaft sealing ring has an annular main body, a sealing lip and can be applied to the shaft and a spring washer for pre-tensioning the sealing lip in the direction of the shaft, wherein the sealing lip has a curvature which is outward in the direction of an opening formed by the shaft sealing ring, comprising a bottom part and a lid like top part, wherein the top part is removably fastened to the bottom part in that one end thereof is inserted partially into the bottom part, wherein another end of the top part, is substantially conical and an outside diameter of the bottom part corresponds to the maximum expansion diameter of the sealing lip of the shaft sealing ring.

Abstract: An improved directional coupler is distinguished by the following features: an attenuation circuit is adjacent and is connected to each of the two coupling line ends on the coupler substrate, or an attenuation circuit is connected to one coupling line end with a terminating resistor (49) being connected to the other coupling line end on the coupler substrate, electrical level evaluation is provided on the coupler substrate, and an interface device for connection of possibly unshielded cables is provided on the coupler substrate, or possibly unshielded cables are connected to the level evaluation circuit device or are connected downstream from this on the coupler substrate, via which the RF signals which are obtained via the coupling line piece can be passed on in the form of analog signals.

Abstract: An improved directional coupler is distinguished by the following features: