Abstract: A snowboard has two bindings for two boots (21) with the bindings being arranged at a substantial angle to the longitudinal axis (45). Each binding includes a board plate (17) secured to the board (11) and a boot plate (21) whic=h is fixedly connectable to the boot (31). Both plates (17, 21) are drawn into firm contact with one another by resilient tensioning devices (24, 25, 26, 27) which are substantially centrally arranged in the front and the rear regions. The resilience of the resilient tensioning devices is so dimensioned that with excessive loadings of the legs of the user the boot plate (21) can turn relative to the board plate (17) to the side, to the front and to the rear and also about a vertical axis (33).

Abstract: A novel cryogenic liquid composition comprising liquid methane and/or natural gas and an effective gelling amount of a gelling agent therefor, comprising finely divided ice particles or finely divided methyl alcohol particles.

Abstract: An improved ozone generator formed from two groups of spaced, interleaved, relatively small reactor plates in a housing. Each of the plates is cooled by a coolant passing through the interior thereof. The coolant is a refrigerant flowing through a refrigeration system for which the plates define the evaporator. Each plate has a ceramic outer coating which provides a dielectric therefor and protects the plate from corrosion. Improved support means for each group of plates includes a pair of tubular mounts formed from fittings which convey the refrigerant to internal passages in the plates, provide the electrical connections thereto, and permit the plates to be coupled together as a modular unit so that the plates can be leak-tested before being placed in the housing. Improved fluid distribution means is provided at the inlet and outlet ends of the housing to assure uniform flow of air into the housing and uniform flow of air and ozone out of the housing.