Abstract: Electric two-wheeler comprising a first frame element extending from an upper end carrying a steering tube for a front wheel to a lower end, a second frame element extending from an upper end receiving a seat to a lower end rigidly fixed to the first frame element, a battery casing arranged in a battery housing space in rolling configuration, and an electric drive motor. The battery housing space is delimited at least in the vertical plane by a lower portion of the first frame element, a lower portion of the second frame element, and a footboard unit. The lower portions have bottom ends connected together and top ends between which the footboard unit extends in rolling configuration.

Abstract: An apparatus for cooling underground power cables. Cooling of underground power cables is presently effected by the circulation of water or oil through pipes within which the cables are situated. The oil or water is then circulated through air or water-cooled heat exchangers which are uniformly spaced along the transmission line. However, a substantial flow of liquid is required to extract a useful quantity of heat, and extensive equipment is necessary to effect this flow of liquid. The subject invention proposes a relatively inexpensive and more efficient apparatus to cool underground cables. The apparatus comprises an enclosed chamber adapted to extend along a portion of a length of the underground cables and adapted to be partially filled with volatile liquid.

Abstract: An apparatus for cooling underground power cables situated in a tubular cable enclosure. Cooling of underground power cables is presently effected by the circulation of water or oil through pipes within which the cables are situated. The oil or water is then circulated through air or water-cooled heat exchangers which are uniformly spaced along the transmission line. However, a substantial flow of liquid is required to extract a useful quantity of heat, and extensive equipment is necessary to effect this flow of liquid. The subject invention proposes a relatively inexpensive and more efficient apparatus to cool underground cables. The apparatus comprises an enclosed chamber adapted to enclose a portion of a length of underground power cables. A liquid supply inlet is provided to the enclosed chamber, as well as an evaporated liquid outlet from the enclosed chamber.