Abstract: To an inventive shopping trolley 11 is attached a device 1 for facilitating the reading of printouts, labels etc. This has a magnifier 2, a weight 3, and a steel cable 4 which connects the magnifier 2 to the weight 3. Moreover, the device 1 has a receiving element 5, which in this case is formed as a metal tube. The upper area of the metal tube 5 has an opening 6 through which the steel cable 4 is guided. The weight 3 is always inside the metal tube 5. The gravitational force G of the weight 3 causes the magnifier 2 to be drawn via the steel cable 4 to the opening 6 and practically onto the metal tube 5. The steel cable 4 can be pulled out from the opening 6 against the restoring force G.

Abstract: Method for installing a duct where an existing longitudinal member is present along a section over which the duct is to be installed. The longitudinal member is utilized as a guide for the duct. The tape-shaped element is closed around the longitudinal element through mating of complementary coupling devices longitudinally situated along the tape-shaped member so as to form a duct, with the coupled tape-shaped element then being propelled along the longitudinal element to extend the duct. The tape-shaped element can house an optical fiber cable. Through use of such a tape-shaped element, the duct, illustratively housing an optical fiber cable, can be formed around an existing (e.g. copper) telecommunications cable with any need to interrupt or remove that cable.

Abstract: Method for installing a duct, a longitudinal member being present along the section over which the duct is to be installed, the longitudinal element present being utilised as a guide for the duct to be installed and the duct being propelled, a tape-shaped element being formed around the existing longitudinal element during the propulsion into a duct closed all around, by coupling to one another coupling means present at the longitudinal edges of the tape-shaped element.