Abstract: A solar powered, solar aiming device pivotally mounted on a base 40 uses a pair of separate solar sensor panels 11 and 12 that are insulated from each other and oriented at an angle to each other. Hydraulics angularly pivot the sensor panels relative to the base in response to pressure produced by sunlight shining on sensor tubes 13 and 14 arranged within the sensor panels to contain refrigerant material. The refrigerant communicates with and pressurizes a pair of bladder separators 21 and 22 that separate the refrigerant from hydraulic material operating the hydraulic pivoter.

Abstract: Particulate insulation materials such as vermiculite, perlite, or cellulose are packaged in sturdy resinous bags 10 sealed at each end and then positioned directly over a body to be insulated. The resin bags contain the insulation particles, hold them in place, and keep them dry; and the particles can be spread into an even barrier layer within the bags, which protect the particles during use. Bags 10 can be laid side by side over a surface, above and below a pipe, and concentrically surrounding a pipe. Bagged insulation particles are especially suitable for underground insulation where backfilled earth applies uniform pressure helping to hold the bags and insulation particles in place indefinitely.