Abstract: An improved apparatus for converting solar energy to mechanical and electrical energy, in which refrigerant composition is alternately evaporated and condensed in a tubing by alternate exposure to heating rays of the sun, comprises two liquid containing reservoirs communicating with the tubing, valve means for alternately directing the evaporated refrigerant composition to displace the liquid from one reservoir to the other, and a pump driven by the liquid as it passes between the reservoirs.

Abstract: In an oxygen mask for being secured over the nose and mouth of a user or patient, an improved means for securing the mask comprises a non-elastic flexible tubing adapted for extending over both ears of the user, ends, and two lengths of elastic flexible tubing, each length having one end secured to the non-elastic tubing, and the other end secured to or adjacent the mask.

Abstract: A self-leveling table has a rectangular top bolted to a unitized base. The base has a horizontal rectangular frame which supports the top fabricated from four welded angle irons. The frame is supported by two pairs of crossed legs, welded at the cross, each of which terminate in a foot. The feet are heavy sheet metal bent slightly so as to touch the floor only at the ends. The table top is fitted with latching devices at each end of the top for attachment of a table extension or another table.

Abstract: In recycled asphalt-aggregate compositions prepared by adding a suitable amount of make-up asphalt to pieces of the used composition and heating the mixture in a rotating cylindrical drum by tumbling the composition over heated pipes as it is gradually directed towards an output end of the drum, the improvement comprising adding an amount of petroleum hydrocarbon to achieve a laid down asphalt penetration of between 25 and 300 dmn at 77.degree. F. A further embodiment of the improved process comprises venting a mixture of hydrocarbon gases and moisture vaporized from the hot composition mixture at the output end of the apparatus, condensing the moisture and removing it and returning the hydrocarbon gases to a combustion chamber for providing heat to the apparatus tubes.