Abstract: An overspeed spoiler for vertical axis wind turbines of the type having straight or curved airfoil blades attached to a vertical shaft formed by a relatively thin flat blade shaped spoiler element hinge mounted on the trailing edge, leading edge, or at a central position of a portion of the airfoil section with the element having two portions one of which is held flush or against a surface by spring means with a surface of the blade towards the turbine rotor axis and the other lies substantially parallel to the chordline of the airfoil, the weight and configuration of the element being such that a predetermined turbine rotor speed the element rotates against the spring force because of centrifugal action and takes up a position generally transverse to the air flow direction such as to cause much increased drag and control overspeeding of the rotor.

Abstract: A method of producing freeze-thaw resistant cementitious porous materials, such as concrete, mortar, stucco, in which up to about 30% by weight of the cement of a porous particulate material is mixed into the material. The particulate material may be finely divided fired clay, brick, diatomaceous earth or other mineral particles having a size range of 20-50 Tyler mesh, a total porosity of at least 30% and a pore size in the range 0.05 to 3.0 microns.

Abstract: The monitor is used with seeder equipment having one or more seeder hopper sections wherein each hopper section has a number of metering assemblies for feeding the seed from each hopper section to the soil. The monitoring apparatus includes at least one sensor consisting of a piezoelectric transducer which provides an output signal in response to being struck by a seed, a vibration isolating mounting structure to position the sensor in the seed flow path between the metering assembly and the soil, and a circuit for receiving the sensor electronic response and providing an indication of seed flow condition. The mounting structure includes an elongated member such as a metal tubing, to one end of which is fixed a cushion made of a material such as a closed cell foam and to the other end of which is fixed a securing member to secure the structure to the seeder.

Abstract: Waste paper, particularly newsprint, is treated to release adhering ink particles (e.g. pigment carbon) from the paper fibers, and the ink solids (and organic contaminants) are then preferentially collected on the surface of inserted non-soap solids which have an affinity for, and are of larger size than, the ink solids. The ink-coated solids can be removed from the system by suitable physical means such as hydrocyclones, screens or decantation.

Abstract: A systemic fungicide and method of application to trees subject to the Dutch elm disease fungus and other fungus diseases wherein the fungicide material used is a water-soluble derivative of methyl-2-benzimidazole carbamate (BCM) and the method of introduction is a positive pressure root injection method. Examples of the water-soluble derivatives are chloride, sulphate, phosphate, nitrate, and sodio derivatives of BCM. The injection method is achieved by severing one or more roots below ground level and applying the fungicide solution to the severed root end under pressure via suitable tubulation.

Abstract: A continuous wave, phase measurement system which provides at least an order of magnitude improvement in accuracy over modulated carrier systems is disclosed for the determination of the thicknesses of layered targets consisting of a known number of dielectric layers, each of a known maximum thickness. This system uses related frequencies such as the fundamental and its harmonics to establish a multi-harmonic coherence relationship whereby a homodyne phase reference between harmonics can be conserved and information extracted from just the received and not the transmitted signals. Consequently doppler effects due to motion between the target and the apparatus, as well as severe local oscillator stability and drift limitations are avoided, and thus this system can measure remote target parameters by interferometric techniques without the distance being a constraint.

Abstract: A system for utilizing the exhaust gases from a hydrocarbon combusting apparatus to enhance plant growth comprising an enclosure for plants having an outer covering and an inner permeable membrane spaced from the outer layer, the membrane being less permeable to toxic gases, present in the exhaust, than to CO.sub.2, and means for conducting the exhaust gas from the hydrocarbon combusting apparatus to the space between the covering and the permeable membrane. In the preferred embodiment, the outer covering and membrane are transparent to light.

Abstract: Substituted pyrrole compounds, such as 3-ethyl-4-methyl-5-carbethoxy pyrrole, 2,4-dimethyl-3-acetyl pyrrole and 2-methyl-5-carboxy pyrrole-4-propionic acid diethyl ester, are alkylated in a single step by reaction with an aldehyde or ketone in the presence of both an acid condensing agent such as hydriodic acid and a compatible reducing agent such as metallic zinc or stannous chloride. Suitable carbonyl reactants include formaldehyde, paraldehyde, isobutyraldehyde, acetone, cyclohexanone and methyl-isobutyl ketone.This application is a continuation application of U.S. application Ser. No. 281,624 filed Aug. 18, 1972, now abandoned, which is a continuation-in-part application of U.S. application Ser. No. 832,001, filed June 10, 1969, now abandoned.

Abstract: An apparatus for the measurement in realtime of the transfer function in both magnitude and phase of an unknown system including apparatus for generating a pseudo-random binary sequence as a test signal, means to match the timing of this sequence and of the sampling process so that the discrete Fourier transform (DFT) of the test signal and the response signal obtained from the unknown system can be computed, means such that this operation can be repeated successively in precisely the same manner without significant time (phase) jitter, means such that the magnitude function obtained from any single transformation can be computed and displayed, and means such that the difference between the phase functions obtained from two distinct DFT's can be computed and displayed.

Abstract: The invention relates to novel neomycin and paromomycin derivatives having antibiotic activity. The derivatives have the formula: ##STR1## wherein R' is --NH.sub.2 or --OH, either R.sup.2 or R.sup.3 is --CH.sub.2 NH.sub.2 and the other is hydrogen, and in addition non-toxic pharmaceutically acid addition salts of these compounds can be used.

Abstract: A scale for weighing vehicles in motion comprising a rigid load platform supporting structure having torque transmitting bars arranged around the perimeter thereof and a support and roller assembly associated with each end of each torque bar for low friction, and a single load cell operating with low vertical travel.

Abstract: A microwave leakage indicator for ovens in the form of a strip of encapsulated liquid crystal film backed by a layer of microwave absorbing material mounted around the edge of the door and overlapping the slot between door and oven where leakage might occur. The characteristics of the liquid crystal material are chosen such that if leakage above a preset level does occur at any location around the edge of the door, the absorbing material generates heat resulting in a quickly noticeable colour change in the liquid crystal film.

Abstract: Arylsulfonyl tetrazoles of the formula ##STR1## where R.sub.1, R.sub.2 and R.sub.3 are selected from hydrogen, lower alkyl and lower alkoxy groups, and their preparation are described.These compounds have been found to be advantageous condensing or coupling agents via phosphoester formation in polynucleotide synthesis.

Abstract: A multi-state memory cell which uses magnetic bubble domains in uniaxial material is described. The cell includes a channel in which a number of stable bubble positions separated by barriers is formed and on which select conductors are positioned to switch a bubble from one stable position to another on a threshold basis by means of coincident currents. A cell in accordance with this invention may take the form of a four-state-two conductor cell, two-bistable-state two-conductor cell, multi-state six conductor cell and six-state three-conductor cell and include destructive or non-destructive readout.

Abstract: A composite attractant (sex pheromone) for the male moths of the beet webworm (Loxostege sticticalis) comprises E-11-tetradecen-1-ol acetate; plus at least one of dodecan-1-ol acetate, dodecan-1-ol, tetradecan-1-ol, E-11-tetradecen-1-ol and E-11-tetradecenal, in minor proportions.

Abstract: Tar sands and like mineral solids-plus petroleum deposits are separated into a petroleum fraction and a solids fraction by contacting with an organic solvent or diluent (in one or more stages) to give a liquid slurry, providing in the system a small amount of an aqueous agglomerating liquid, mixing and agitating until discrete compact agglomerates of hydrophilic solids form, separating the solid easily-handled agglomerates and recovering the petroleum fraction and solvent or diluent. This process avoids the large volumes of aqueous effluent inherent in the "hot water" and other processes using large amounts of water. The solid agglomerates may be used as clean fill, sintered to aggregate, or modified to serve as soil amendments.

Abstract: A probe type high voltage attenuator for a pulse measuring system to provide an overall rise time of less than 50 picoseconds with a peak voltage capability of 20 kV. Attenuator perturbations at the 50 ohm impedance level are minimized by providing a high resistance in series with a lossy distributed transmission line. The reflection waves from the attenuator are absorbed by this lossy distributed transmission line minimizing perturbation of the source being measured. The attenuator is of a shielded type to minimize interference from extraneous fields.This invention is directed to an attenuator for use in the measurement of point voltage sources in electric circuits and in particular to an attenuator which produces minimum loading on high voltage sources in the measurement of fast rise time pulses.

Abstract: A blue flame oil burner is provided wherein an oil atomizing nozzle produces sprayed oil droplets as a symetrical hollow cone having an included angle for the outside edge of the oil spray, when the oil is sprayed in still air, in the range 60.degree. to 80.degree., an air swirler with an air pre-swirler both have blades with a helix angle in the range 50.degree. to 65.degree., with the blades of the air swirler adjacent the spraying end of the atomizing nozzle inclined in the direction of the hollow cone at an angle in the range 20.degree. to 55.degree., and a supply tube for delivering air through the air pre-swirler to the air swirler. The air flows along the supply tube and is preswirled in the pre-swirler and then finally swirled in the air swirler so that sprayed oil droplets in the hollow cone are carried by the swirling air, which diffuses with them in such a manner that the oil droplets are evaporated prior to combustion and:I.

Abstract: A locked hybrid junction power combiner comprises in its simplest version a single hybrid junction (0.degree., 180.degree. and 90.degree.) and an appropriate phase shifting element combining three one port oscillators (one master oscillator strongly locking the other oscillators). The combiner can be extended to combine any odd number of oscillators. Combining efficiency approaching 100% and locking figure of merit exceeding that of the master oscillator have been experimentally observed. Isolating the master oscillator from the hybrid by a circulator, the LHJ combiner can generate high microwave powers with spectral purity of the master oscillator; e.g. Impatt diode power capabilities may be combined with Gunn diode spectral purity. The combiner with an ordinary E-H waveguide hybrid junction can be employed to generate ultra-high microwave powers by combining high power tube sources.

Abstract: A method for detecting and measuring the activity of enzymes capable of digesting fibrinogen or fibrin and for detecting and measuring the activity of enzyme activators and enzyme inhibitors of said enzymes, by incubating an unknown enzyme sample in a humid labelled fibrinogen or labelled fibrin coated test apparatus, isolating the labelled degradation products of fibrinogen or fibrin released by the unknown enzyme sample and measuring the labelled degradation products of fibrinogen released by the unknown sample.