Abstract: A spin filtering device has: a spin filter (1) having an input region (3) for carrying an electron current, an output region (4) for carrying an electron current, and a three-dimensionally confined quantum region (2a) arranged to operate in the Coulomb blockade regime and separating the input and output regions (3 and 4) whereby electrons can only pass from the input region to the output region by tunnelling through the quantum region; and Zeeman splitting means (5) for causing Zeeman splitting in the spin filter, the quantum region (2a) and input and output regions (3 and 4) being formed such that the Zeeman splitting in the input and output regions (3 and 4) is less than the Fermi energy such that, in operation, the spin filter outputs a tunnelling current predominantly of one spin polarity. The direction of Zeeman splitting may be controlled to control the predominant spin polarity.

Abstract: An improved vortex mill for milling a substantially particulate solid material, which includes one or more working chambers. The mill also includes one or more working fluid inlets and one or more discharge ports. One or more working fluid inlets together with one or more discharge ports facilitate the vortex flow within the one or more working chambers. There are also one or more feed inlets to provide milling of the solid material, which is discharged from one or more discharge ports. In addition, there is apparatus for inducing controlled perturbations in the flow of the working fluid in the one or more working chambers, thereby to improve the milling of the solid material in the vortex flow.

Abstract: Run into a well, e.g., in a tube, on a pipe string is a hydromechanical cleaner. The bridge is washed out by the direct desending flow of drilling mud pumped through the pipe string 2. The cleaner is moved downward as the bridge is washed out by moving the pipe string. Ascending flow of drilling mud rotates cleaning heads in opposite directions. Cutting knives of the cleaning heads mechanically remove deposits from the walls of tubing 1. Deposits from the walls are removed mechanically during running of the cleaner into the well and during its lifting from the well. Products of the washed out bridge and deposits are removed from the well by an ascending flow through the side branch pipe of the wellhead circulating head. The device for embodiment of the method includes also a mechanism for moving the pipe string and a pump unit.

Abstract: The present invention is directed to a method for making artificial snow wherein a snow-inducing agent is injected into the water of a snow-making system along with a particulate for increased snow-making capabilities and a higher quality of snow The snow-inducing agent is a compound being a sulfate with a C.sub.8-16 carbon chain alcohol. Preferably, the compound is sodium myreth sulfate. The snow-inducing agent places tiny micro millimeter size air "bubbles" within the water molecules thereby stretching the molecules. The particles then mix in the wall of the water molecules causing the droplet to be hollow. The thin outer wall containing the particulate acts as a nucleating agent to start the freezing process. The molecule is less dense causing a faster transfer of latent heat combined with sensible heat.

Abstract: The present invention relates to an apparatus for tilting a keyboard of portable computer, in a manner that a rear end of the keyboard is raised up to a predetermined height by opening its cover, so that the user can operate keys of the keyboard more conveniently. The apparatus for tilting the keyboard of a portable computer of the invention can radiate heat generated from various electric components on a main PCB of a base, during operating the computer, through a ventilation space formed between a keyboard cage on the top side of the base and a bottom side of the keyboard when opening the cover. The apparatus in accordance with the present invention comprises: a keyboard of which both sides of a front portion are rotatably joined by hinge means to a front portion of a keyboard cage formed on a base. A cover is rotably engaged with the base by hinge means mounted within an interior of a rear side portion of the base to be engaged with at least a protruding member of the cover.

Abstract: The object of the invention is to provide a process and a device for hydroponic raising of plants in a vegetal vessel filled up with a substrate, by conveying a nutrient solution into the roots feeding zone, wherein the supply of the nutrient solution is carried out by way of aerosol irrigation of the substrate surface at time intervals and with the periodicity and duration of irrigation depending on ambient air temperature. The device for the implementation of the process comprises a collector of the nutrient solution, a pump, a vegetal vessel with a drain connection, the upper portion of which accommodates a distributor of the nutrient solution made in the form of a tube which lower part is perforated, the said tube being placed at a distance above the substrate surface, the total area of the openings in the distributor tube is smaller than the cross-sectional area of the drain connection.

Abstract: In a method of preparing styrene plastics, the water medium containing tricalcium phosphate is prepared in situ (0.15 to 1.5 wt. %). Then, calcium carbonate (0.07 to 0.35 wt. %) is heated and dispersed therein. Thereafter, the monomer/comonomers/prepolymer, and secondary sodium alkylsulphates (0.001 to 0.020 wt. %) are introduced into the suspension polymerization process at 15 to 47% conversion. This method permits production of styrene plastics using a common technology, while providing specified bead size distribution, low concentration of dust fractions, and enhancement of the process stability.

Abstract: A pulp with ph=9.5 to 11.5, resin, and cyanide KCN is fed to a reaction zone. KCN is in a concentration of CN.sup.- ions in the liquid phase of the pulp from about 0.1 to about 10 g/l, which is maintained constant. The sorbent is in an amount providing its concentration 1 to 1.5% of the reaction zone volume. The leaching procedure produces a sorbent with impurities and rich in gold and silver, and a cyanic pulp depleted of gold and silver. Then, the sorbent rich in gold and silver is separated from the cyanic pulp. The saturated sorbent with impurities is processed in the desorption zone in two stages by passing therethrough a sulfuric acid solution of thiourea, the volume of the solution comprising 10 to 15 volumes of said sorbent. The sulfuric acid solution of thiourea is in an amount of 30% to 50% of said solution volume. A sulfuric acid solution of thiourea rich in gold and silver and a sorbent depleted of gold, silver and impurities is obtained.

Abstract: This process is used to prepare pig meat, including pig stomachs and pig intestines. The process includes the steps of thawing, cooking, washing, and refrigeration. Frozen pig meat is first thawed. The meat is then slow cooked in 195 degree F. water for a certain period after which the cooking process is stopped. The meat is then washed in a granular sodium hydroxide solution, rinsed and then soaked in an oxygen bleach solution and rinsed again. The meat is then refrigerated for sale.

Abstract: This process is used to remove the bones and joints from duck feet and to process the duck feet to make them edible. Initially, the duck feet are frozen for one or two days and are then thawed. After slow cooking for fifteen minutes, the duck feet are soaked in cold water for twenty minutes. After refrigerating for two hours, the bones and joints of the feet are removed. For about five minutes, cold water is run over the duck feet and then the duck feet are washed for 90 to 120 minutes in a solution of oxygen bleach and 100 degree F. water. Then, cold water is run over the cold feet for two hours and then the duck feet are refrigerated for two hours. At that point, the duck feet are ready for packaging or for serving or for additional cooking.

Abstract: A method for continuous production of hot-rolled strips is used at metal works and involves continuously casting a thin slab which is stored and rolled into a strip in the form of individual portions in several runs with return into the storage zone and with subsequent cooling, cutting, and coiling. The slab and the returned portion are stored simultaneously by combined coiling into an intermediate coil which is moved along the storage zone during coiling and during uncoiling of the portion of the slab and strip being rolled.An apparatus for carrying out the method has roller-hearth furnace, a storage in the form of a carriage provided outside the roller-hearth furnace for movement therealong, and a means for forming an intermediate coil from the slab and from the returned portion of the strip. The means for forming is installed on the carriage in the furnace so that the intermediate coil can move over rollers of the furnace during coiling and uncoiling.

Abstract: The removable jewelry stone setting includes a cover that is pivoted on a finger of the setting to permit the removal and replacement of the jewelry stone. A link is pivotally connected to the other end the cover. At the other end of the link, a lock is pivotally connected to the link and its other end is removably frictionally engaged to the finger. In this way, by releasing the friction fit of the tab of the lock against the finger, the lock and link can be released, so as to permit the pivotal movement of the cover, so as to permit the removal and replacement of the jewelry stone.

Abstract: A device comprises cleaning heads 4,5 mounted on a shaft for free rotation. On sinking and elevating the device on a tractive member, in a liquid up-current, the heads start rotating in different sides. Cutting elements--knives--having an involute profile and arranged on oppositely directed spiral paths cut the deposits. On descent, cutting collars of said knives situated in the lower portion on head perform "rough" cutting, the knives of both heads crush the cuts and chips, and cutting collars in the upper portion of the upper head carry out the "finishing" of the internal surface of an uptake pipe. The given mathematical relations defining the ratio of parameters of the device elements are as follows: the heights of heads and an angle of attack of knives, the lengths of the shaft and a stabilizer, their mass, the length of the pitch of knives and the diameter of the heads.

Abstract: The illuminated animal collar includes a plurality of illuminating means along the surface of the collar. A switch is included, along with rechargeable power means. A plurality of solar cells are included to periodically recharge the rechargeable power means.

Abstract: The high frequency welding machine utilizes the computer or central processing unit, various means for sensing various parameters of the welding machine, and various means for activating various components of the machine. In particular, the computer maintains information on the parameters of the welding machine and automatically selects the necessary commands for the various components of the machine.

Abstract: A television system, the composite color television signal (E.sub.M (t)) whereof is generated using reflected modulated signals (E.sub.3 (t)), wherein at the transmitting side video signals (E.sub.1-1 (t), E.sub.1-2 (t)) are used to quadrature modulate subcarriers at the zero and .+-.(.pi./2) phases, thereby generating folded-band signals (E.sub.3 (t)) at subcarrier frequencies selected such as to provide the required phase shifts of the subcarriers in adjacent lines of one frame and in identically numbered lines of adjacent frames. The thus generated folded-band signals are transmitted during time intervals allocated for them in the composite color television signal (E.sub.M (t)). At the receiving side, separating messages of folded-band signals (E.sub.3 (t)) out of the received composite color television signal (E.sub.M (t)) and delaying these messages in delay units (11) for time intervals constituting multiples of the television scan.

Abstract: The frame for hanging files may be quickly assembled and does not require tools or any type fastening devices. The rails for holding the files are positioned within the channel of a rail housing, that is positioned at the top end of rail supports. A locking bar with a cam head pivots within the rail housing to first bear against the rail and then to hold the rail in position within the channel of the rail housing. Support bars are then used to hold the locking bar in position and to provide stability for the frame.

Abstract: The present invention relates to medicine.A method for treatment of cholelithiasis and chronic hepato- and cholecystopathies secondary to that disease consists in that the patient with concrements not in excess of 2 cm in size are instituted on the first day of treatment a diet which is not causative of deterioration of their general state, whereupon the patients' gastrointestinal tract is evacuated, a cholinolytic spasmolytic agent is administered, and tubage is performed, accompanied by oral administration of a vegetable oil; on the second day of treatment the patients are prescribed a meal of food which promotes a cholagogic effect, and abundant drink, whereupon the motor function of the intestine is stimulated until the concrements are eliminated.

Abstract: The device consists of a Portable Dryer for drying the interior of articles, such as ski boots, ski gloves, etc. It includes articulated tubing that can be forced all the way into the toe portion of the ski boot. At the other end of the articulated tubing is a distribution connector for connecting to a suitable means of forcing air through the tubing and into the interior of the ski boot for drying purposes.