Abstract: Polyacetals and polyketals are prepared by reacting emulsified carbonyl compounds with emulsified polyfunctional alcohols in aqueous media and in the presence of specified polycondensation catalysts. Coherent films of the resultant polymers can be applied to substrates from aqueous or non-aqueous media.

Abstract: A safety device for controlling the excess flow of gas adapted to shut off the flow of gas when the flow of gas exceeds a predetermined level. The device comprises a cylinder having in one end a throat member through which the gas flows, and a plurality of orifices formed around the cylinder through which orifices the gas is delivered to the throat member and then to a burner; a ball disposed at the other end of the cylinder, the ball having one side subject to the supply pressure of the gas and the opposite side subject to the delivery pressure of the gas. When the flow or delivery rate of the gas exceeds the predetermined level that is determined by the flow capacity of the orifices, the delivery pressure of the gas decreases to allow the ball to be pushed by the supply pressure of the gas so as to close the throat member, thus shutting off the flow of the gas.

Abstract: The ultra-miniaturized, active solid-state devices and circuitries have unique material bodies having signal-translating regions attached thereto for active signal translation. These regions, comprising melt-grown, or simulated melt-grown, metallurgical compounds including oxides, eutectics, and intermetallics, are of controlled compositions, concentration profiles, and electronic or other optoelectromagnetic properties. In some devices, the microstructure of the compounds comprises a plurality of microscopically thin, regularly-shaped and uniformly-spaced bodies of one phase material dispersed in a matrix of another phase material. The electronic conductivity of the bodies is substantially different from that of the matrix, and the bodies all terminate at microscopic distance from the pn junction (or other interfacial rectifying barrier region), so as to confine the signal current carries to flow mainly in only one of the phases. This achieves carriers microstreaming or microbranching effects.

Abstract: An improved method and apparatus are disclosed for generating circular arcs of any arc length greater than zero up to and including a full circle of 360 degrees. The method and apparatus can locate nonsymmetrical closest points for noninteger radius and arc center values. The method and apparatus is capable of generating the incremental move commands for drawing an arc either in the clockwise or counter clockwise direction which is a distinct advantage when used to drive a pen type electromechanical plotter. By dividing the generation of a 360 degree arc into eight octants, only two of the original eight directions need to be considered as candidate directions toward the next integer display matrix value to be displayed. The method and apparatus employ a novel initialization which provides a simple stopping test for any circular arc of arbitrary length and direction. Only simple addition and sign testing is used to display the circular arc.

Abstract: A method for ore prospecting comprises: locating the ore body, determining the concentration values of a selected chemical element at two positions in the ore body; measuring the distance between the two positions; estimating the freezing segregation behavior of the selected element during the freezing of the ore body; and from the determined concentration values, measured distance, and estimated freezing segregation behavior calculating the size of the ore body.

Abstract: Plural strands of wire emerging from the cooling tower of a galvanizing line are cooled from about an elevated temperature to ambient temperature by heat exchange apparatus in which the strands are passed through an agitated, flowing stream of cooling water. The apparatus is designed to accommodate knots that connect strands in end-to-end relation or other strand surface irregularities. It also permits disorientation of the strands from their respective pass lines without disrupting operation of the apparatus.

Abstract: The invention discloses method for self-optiming, in real time, a machine relative to a specific performance characteristic in response to variations on a prescribed number m of variables. This method comprises selecting a statistical design; repeatedly and at n time instants adjusting conditions of the m variables and simultaneously recording the dependent values of the performance characteristic; analyzing the n sets of data to determine the functional relationship between the m variables and the specific performance characteristic; determining the combination of the m variables that gives optimum value of the performance characteristic; and setting the conditions of the m variables at the thus-determined combination. A machine in the form of a programmed microprocessor embodying this self-optimizing method is also disclosed.

Abstract: A timer-controlled speed changing device for electric fans comprising a timing switch operatively connected to a first speed changing circuit and a second speed changing circuit, for changing the speed of an electric fan from a pre-set speed with the first or second speed changing circuit to another pre-set speed with the second or first speed changing circuit after a predetermined time period set by the timing switch.

Abstract: The invented method for sampling freeze-segregated material comprises determining a position in the segregated pattern where the elemental concentration is the same as the initial concentration, and taking a sample either at, or around the position so that the sample as a whole also has the same composition as the initial concentration.

Abstract: Polyesters are prepared by reacting aqueous compositions containing an emulsified hydroxyacid or an emulsified mixture comprising a polyfunctional carboxylic acid or anhydride and a polyfunctional alcohol. The emulsion also contains a suitable polycondensation catalyst. The resultant polyesters are useful as plasticizers and as precursors for alkyd resins and other polymers.

Abstract: A motion system is provided by a platform generally parallel to a base and connected thereto by a column and powered and controlled extensible members, at least three of which are connected between distributed points around the column. In a three degree of freedom device, the column is conical, rigidly supported at its base with a universal joint at its top. The points of attachment define triangles in the base and in the platform surrounding the column with one extensible member connected between each.In the four degree of freedom version, the column is modified by making it effectively a column which is pivoted or guided at the base or contains an extensible member, preferably retains its triangular shape and its universal joint connection to the platform at its apex. For stability four powered and controlled extensible members are provided between points in the base and platform distributed around the column, a preferred pattern of arrangement being a square with the column at the center.

Abstract: Therapeutic compositions containing an amidinourea are used in the treatment of animals infested with blood residing parasites, particularly parasitic protozoal infestations of the blood and blood-forming organs.

Abstract: New nucleoside derivatives possessing strong anti-tumor activity with low toxicity, represented by the general formula: ##STR1## wherein (A-CO-- is a residue of a saturated straight or branched chain fatty acid, B is a nitrogen-containing group, Q is a substituent of the fatty acid, Z and Z' each is H or OH with the proviso that both of Z and Z' are not OH, and n is zero or an integer of at least 1, as well as physiologically acceptable salts thereof. These nucleoside derivatives are prepared by introducing the nitrogen-containing acyl group directly in one step or indirectly in two steps into the 5'-position of 5-fluorouridine, 2'-deoxy-5-fluorouridine or 1-.beta.-D-arabinofuranosyl-5-fluorouracil and splitting off any protective group and optionally converting the free compound into a physiologically acceptable salt thereof or vice versa.

Abstract: A velvet-like covered sponge inner-layer bathing brush having a pair of opposed retractable handles each connected to the body of the brush by a set of strings, with retracting means located within said body.

Abstract: Method and apparatus for determining the refractive index of an optical film over a wide spectral range is described that involves measuring the changing radiant reflectance (or transmittance) of the film at various wavelengths as it is being deposited upon a substrate, as for example by vacuum deposition process. By determining the values of the extreme limits, an envelope of the peak reflectance can be developed from which the film's index of refraction is obtained over the entire spectral range that is situated between the two extreme wavelength channels.

Abstract: A hydrocarbyl-substituted dihydrouracil represented by the formula: ##STR1## in which R is a hydrocarbyl radical having an average molecular weight ranging from about 150 to 2000 and R' is hydrogen, a hydrocarbyl radical having from 1 to 20 carbon atoms, or an R"--(X--R'").sub.y -- radical in which R" is an alkyl radical having from 1 to 12 carbon atoms, X is oxygen or an --NH-- radical, R'" is a divalent hydrocarbon radical having from 1 to 3 carbon atoms and y is an integer from 1 to 3, a method for preparing said hydrocarbyl-substituted dihydrouracil, and a lubricating oil composition containing same is provided.

Abstract: The improved powder metallurgy (P/M) process for making a P/M product having a multi-component alloy system of a given composition comprises collecting powder particles of the base metal and forming on the surface of these particles a coating containing the alloying elements to a thickness calculated to provide the given composition in the finished product. The forming step is accomplished with a pure solution of a chemical compound of the alloying elements.

Abstract: The present invention provides a process for sweeping methane from a physical solvent used to remove carbon dioxide and hydrogen sulfide impurities from an impure methane stream. This process includes the steps of cocurrently mingling a mixture of physical solvent, methane, carbon dioxide and hydrogen sulfide with a flash gas to form a resulting gas and liquid mixture that has a higher concentration of carbon dioxide and a higher concentration of hydrogen sulfide than the liquid stream, and then flashing and separating the resulting stream at a pressure lower than the liquid feed pressure to yield a flash liquid that is further flashed at a pressure lower than the preceding flash pressure to provide the flash gas mingled with the feed liquid stream.

Abstract: A drum brake, primarily for a trailer, which gives normal braking torque in forward direction and low torque in reverse. This is achieved by having a pivoted lever acting between the one ends of two shoes remote from the ends between which the brake actuator is located. The shoes act on the lever at different effective radii and the forces applied by the shoes to the lever hold it in a first position during forward rotation, thus allowing normal braking torque, and a second position during reverse rotation which allows the ends of the shoes acted on by the actuator to move apart thus allowing a limitation of the reverse braking torque by limiting the stroke of the actuator.