Abstract: A rod-shaped member comprises a respective cleaning wick projecting from the member at each of its two ends, the cleaning wicks extending out of a pin-shaped member end at the one end and being guided in a hollow-cylindrically shaped member end at the other and being bent around a free edge of the latter member end. While crushing the projecting wick, the one end can be introduced into socket-shaped LWG plug connector parts and therefore serves for cleaning LWG end faces ending in depressions, whereby, given suitable dimensioning, a pin-shaped LWG plug connector part can be inserted into the hollow-cylindrically fashioned member end and can be turned therein. Thus, a light waveguide end face at the free end of the plug connector part can be cleaned together with and at the same time as the outside surface of the pin-shaped plug connector part with the same tool.

Abstract: The mechanism for adjusting a lumbar support of a back of an office seat, motor vehicle seat or the like, with a plate-like moulding (4) adjustable perpendicularly to the plane of the seat back serves to make the sitter occupy an anatomically correct posture, the moulding (4) supporting the sitter's back. The moulding (4) is adjusted by a spring (5) on which the moulding is disposed and is adjustable transversely by a manual control element. Moulding (4) can also be moved vertically with respect to frame (3). Spring (5) with moulding (4) is adjusted by a shaft (19) mounted for movement with its axis parallel to the plane of the seat back. Shaft (19) can be directly or indirectly coupled by transmission elements (18, 17) to a tapped collar (13) or a toothed rack (25). An indicator mechanism (40, 40a) may be provided to indicate the position of the moulding (4) at any time, a scale plate (41) being connected to the collar (13 ) and the pointer (42) being connected to a threaded pin.