Abstract: A system for generating electric energy uses photovoltaic elements that are disposed on a supporting structure formed, in particular, by supporting cables and adjusting cables or the like. The elements can be pivoted about at least approximately vertically oriented axes, whereby they can track the east-west movement of the sun, and they can be pivoted about at least approximately horizontally oriented axes, whereby they can be adjusted to the altitude of the sun. The photovoltaic elements are attached on several supporting beams, which are oriented at least approximately parallel to each other and approximately horizontally, the supporting beams can be pivoted at one of the two ends thereof on a supporting cable or the like about an at least approximately vertical axis and are mounted rotatably about the longitudinal axes thereof. The supporting beams are coupled at the other end thereof to a pivoting and rotating device, which is formed by at least one supporting and adjusting cable.

Abstract: A device for conveying people or other objects, for example a car of an aerial cableway or a cable railroad, has a driveless running gear, which is pulled along a track cable. The car has consumers for electrical energy and an electrical energy storage device. Electrical energy is obtained by friction wheels on the running gear. The friction wheels are connected to a generator. The electrical energy is stored in the electrical energy storage device.