Abstract: A gas turbo-machine and method of designing and constructing such machine includes preselecting specific operating conditions for the gas turbo-machine, and constructing a master stage as a model to have a given design and geometric shape which results in substantially the optimum efficiency during operation of the master stage at the preselected operating conditions. At least one additional stage is then added to the master stage which is substantially identical to the master stage in geometric shape and design, but in which the linear dimensions of the additional stage differ from those of the master stage in accordance with the formula LT={square root over (DT+L )} where L is the ratio of the linear dimensions of the additional stage to the master stage and D is the gas density ratio of the master stage.

Abstract: A gas turbo-machine and method of designing and constructing such machine includes preselecting specific operating conditions for the gas turbo-machine, and constructing a master stage as a model to have a given design and geometric shape which results in substantially the optimum efficiency during operation of the master stage at the preselected operating conditions.

Abstract: A gas turbo-machine and method of designing and constructing such machine includes preselecting specific operating conditions for the gas turbo-machine, and constructing a master stage as a model to have a given design and geometric shape which results in substantially the optimum efficiency during operation of the master stage at the preselected operating conditions. At least one additional stage is then added to the master stage which is substantially identical to the master stage in geometric shape and design, but in which the linear dimensions of the additional stage differ from those of the master stage in accordance with the formula L={square root over (D)} where L is the ratio of the linear dimensions of the additional stage to the master stage and D is the gas density ratio of the master stage.

Abstract: A method and apparatus are provided for superpurifying crystallizable substances to a purity level of 99.999%. Included is a closed multistage system which maintains controlled transfers of material between a plurality of stages. The method and apparatus avoid the need to transfer solid crystals from one stage to another and effect efficient and very effective separation of purified crystals from their mother liquor.

Abstract: A method and apparatus are provided for superpurifying crystallizable substances to a purity level of 99.999 percent. Included is controlling the reflux ratio by controlling and/or metering transfers of crystals and mother liquor at selected locations and by maintaining a steady state of transfers between a plurality of stages that carry out similar operations.

Abstract: A method and apparatus are provided for superpurifying crystallizable substances to a purity level of 99.999 percent. Included is controlling the reflux ratio by controlling and/or metering transfers of crystals and mother liquid at selected locations and by maintaining a steady state of transfers between a plurality of stages that carry out similar operations.

Abstract: High purity aluminum oxide is produced by continuously reacting high purity metallic aluminum, either solid or liquid, with high purity oxygen, present in stoichiometrically excessive amount, within a vertically oriented cylindrical vessel closed at the top and open at the bottom and having cooled side walls on which there forms a layer of solid aluminum oxide. Newly formed aluminum oxide deposits as a liquid film on the inside surface of this layer and flows downwardly thereover by gravity to the open bottom of the container and thence falls to a collecting vessel below, solidifying either during this fall or after impingement on a moving metallic surface. An annular array of burners, e.g. oxy-hydrogen burners, limits downward growth of the layer below the vessel, prevents closing off by growth of that layer of the space within the vessel, and fosters detachment of the downwardly flowing film in the form of drops to fall to the collection vessel.

Abstract: A solar collector having at least one solar cell, an air retaining plate located parallel to and immediately behind the unlit side of the cell. A plate is spaced from the back of the cell to permit passage of substantially all the air that is to be treated by the cell, the retaining plate being in communication with the portion of the collector through which the air is withdrawn.

Abstract: There is disclosed a two step process for manufacturing aluminum oxide of controlled particle size from aluminum sulfate by the thermal decomposition of aluminum sulfate into aluminum oxide and other gaseous by-products at a relatively low temperature, and the treatment of the aluminum oxide product of the first step at a controlled higher temperature for the purpose of increasing the average particle size by a desired amount.

Abstract: A male and female element each having one or more prongs for mating engagement with each other. The prongs of the female element have downwardly extending slots for receiving a transverse bar contained in a prong of the male element. A pushing member is provided in the female element for urging the bar into the slots and for holding the bar therein.