Abstract: Organometallic compounds of high carbanion yield are prepared by metallation with barium, strontium or calcium or mixture of the same of certain acidic organic compounds having a pKa value of between about 15 and 35 on the MSAD scale in the presence of aprotic polar solvents, e.g., barium reacted with xanthene in 1,2-dimethoxyethane to yield dixanthenyl barium. Such organometallic compounds formed by metal-hydrogen exchange reaction are useful in initiating anionic growth-type polymerization of monomers, e.g., alkylene oxides and vinyl compounds, to form homopolymers and copolymers. The persistence of polymer carbanions created by such catalysts makes possible the controlled preparation of a variety of polymers, including block copolymers.

Abstract: An apparatus for detecting the presence in a liquid of material that emits fluorescent radiation when stimulated by ultraviolet radiation. A chamber having an inlet and an outlet for passing a stream of liquid therethrough. A source of ultraviolet radiation associated with said chamber with means for energizing same whereby said radiation may pass to said stream and a receiver arranged to receive fluorescent radiation emitted by such a stream.

Abstract: A golf swing practice and exercise device comprises a vertical guide member, e.g., an open-ended tube, a free-fall weight which moves vertically along the guide member, a cord attached at one end to the weight and at the other end to a sock to attach it to the head of a golf club, a fairlead at the top of the guide member and another fairlead located about head-high on the guide member. The cord passes through the fairleads and applies a "pull" on a golf clubhead equal to the weight which can be changed to vary the degree of exercise obtained in use of the device.

Abstract: To provide an electronically reproduced image of an original in which defects have been removed by retouching, defects in the original are marked in such a manner that the signals from an analysing scanner corresponding to the defect marking are distinguishable from those corresponding to the remainder of the original and the sensing of the defect-representing signals is used to cause a replacement signal, derived as a function of the densities of picture elements adjacent the defect in the original, to be substituted for the defect-representing signal before the train of signals from the analysing scanner is used to control the treatment of an output surface to form the image.

Abstract: The present invention provides a foamable polyolefin composition comprising a polyolefin, a crosslinking agent, a blowing agent decomposable at temperatures higher than the decomposition temperature of said crosslinking agent and a gas trapping agent as well as a method for manufacturing foamed polyolefin from said foamable polyolefin composition.

Abstract: A leaky coaxial cable for use at ultra-high-frequency has, between an outer conductor having slots for the radiation of electromagnetic wave and a protective sheath covering the outer conductor, a dielectric layer with electrically low loss, thereby decreasing the transmission loss. By arranging the slots of the outer conductor in a predetermined relation, it is possible to provide a leaky coaxial cable having a wide band characteristic and less transmission loss.

Abstract: A method of preparing 2-hydroxy-3-alkyl-2-cyclopenten-1-one which comprises reacting 2-alkyl-5-carboalkoxycyclopentanone with nitrite in the presence of water and alkali; rendering the reaction system acidic; and either treating the mass for hydrolysis by heating or carrying out oxime exchange reaction in the presence of an aliphatic lower carbonyl compound added as an acceptor to the acidified reaction system.

Abstract: An equipment for execution of maintenance operations in a multi-unit processing system one of which is a central unit comprises, in each unit, shift registers each made of a hardware series connection of multi-bit and single-bit register members which are parts of the unit and which, for part of them, copy the conditions of parts of the unit, and a local automaton for actuation and control of said shift registers, and a common maintenance station having command and data exchange facilities with the said local automatons. Each local automaton includes means responsive to local and remote commands for controlling read-out and write-in operations of said shift registers, interrupts of the operation of the unit and test and diagnosis routine executions by the said unit from the data in the said shift registers.

Abstract: This case is directed to the preparation of polyvinyl acetal resins as semi-permeable membranes for use in the treatment of feed solutions by reverse osmosis, ultafiltration or related techinques.

Abstract: An IMPATT diode is manufactured by doping a silicon n-type epitaxial layer and bombarding the doped layer with ions, preferably protons.

Abstract: In a honeycomb conveyor belt the cranked or wavey belt sections extending between and pivoted to parallel transverse rods each comprises at least two metal strips which are correspondingly bent to the cranked or wavey form of the belt section and are disposed in nesting relationship with respect to one another. The transverse rods pass through the strips of the belt sections.

Abstract: This invention relates to a ventilating fan of the kind comprising a housing defining an air passage, and an impeller rotatable from an electric motor or other prime mover within the housing.The invention is concerned with the provision of an improved automatic shutter device which consists of shutter plates which may have their pivot axes tangential to a common circle and movable between a position which closes the air passage and a position which opens said air passage. The shutter device is operated by means responsive to rotation of the impeller shaft for moving the shutter means to the open position when the impeller is rotating and to the closed position when the impeller is not rotating. The shutter operating means may be such that substantially no thrust or load is placed upon the prime mover when it is rotating at a selected operating speed.

Abstract: An addressing device is described for a control store comprised of a read-only storage portion and a read-write storage portion, each divided in addressable microprogram sectors and both accessible through a common address register and accessing to a common read-out register. Said control store is a part of a multimicroprogrammed unit further comprising a logical unit, a status register for said logical unit and an automatic store address forming organization operating on data supplied from the common read-out register and the logical unit. When a microprogram stored in a sector of the read-write storage portion must be substituted for a microprogram stored in a sector of the read-only storage portion, the logical unit forces into the status register, a pointer code and the sector addresses of the concerned read-only and read-write storage portions.

Abstract: A method of polymerizing imide type norbornene derivatives which comprises the ring-opening polymerization of imide type norbornene derivatives containing at least one N-substituted cyclic imide group or a mixture consisting of said norbornene derivatives as the main component and cycloolefins in the presence of a catalytic system comprising organic aluminum compounds and tungsten and/or molybdenum compounds.

Abstract: A particular range of glass compositions in the soda-boro-silicate glass system has been found to be particularly suitable for ultra-low loss dielectric optical waveguides. The composition range is indicated in FIG. 1 of the specification. By preparing such glasses in a reducing atmosphere (0-20% CO in CO.sub.2) and adding about 1% As.sub.2 O.sub.3 to the melt attenuation coefficients due to copper and iron can be minimised. The water content of the glass can be reduced by bubbling dry CO in CO.sub.2 through the molten glass. Glasses containing less than 30% Na.sub.2 O by weight have the lowest losses. Using glasses of this type dielectric optical waveguides having an insertion loss of less than 14 dBKm.sup.-.sup.1 have been made.

Abstract: Energy propagating in a dielectric optical waveguide may be transferred from one mode of propagation to another by inducing a spatially undulatory variation in refractive index in the core of the dielectric optical waveguide. Such a variation may be induced by an electro-static field. The electro-static field may be directed either longitudinally of, or transversely of the dielectric optical waveguide. A suitably periodic electro-static field may be generated by positioning a suitable electrode structure about the dielectric optical waveguide. For certain applications it may be desirable to arrange for the spatial period of the electro-static field to vary in a random manner. By arranging for propagating modes to couple to non-propagating modes an optical modulator may be produced.

Abstract: This invention relates to fluidised bed combustion systems and facilitates the maintenance of the depth of the bed. A discharge pipe projects upwardly into the bed so that bed material can flow into its upper end and escape downwardly. The end of the pipe is surrounded by an enclosure and air is discharged into the enclosure so that material will enter the pipe from within the enclosure and have been cooled in the enclosure by the air discharged into it. The walls of the enclosure may themselves be cooled. The invention is illustrated in FIG. 1.

Abstract: A method for manufacturing cyanonorbornene by reacting acrylonitrile with a fraction resulting from cracking a petroleum fraction, particularly naphtha and mainly containing a mixture of various kinds of hydrocarbon each having five carbon atoms.

Abstract: The small dimension (inferior to one micrometer) of the grains of oxydes obtained by chemical precipitation is retained during the processing of the ferrimagnetic part through precise stoichiometry, cold isostatic pressing and sintering under vacuum at a temperature below 1400.degree.C and for a duration shorter than 4 hours.

Abstract: An explosive slurry composition having excellent suspension stability, good thixotropic characteristics, high detonation power and good temperature characteristics comprises as ingredients a water-swollen gel of a complex composed of sodium montmorillonite and a water-soluble organic compound having a polar group, and an oxygen supplier such as ammonium nitrate and/or a sensitizer such as aluminum powder and/or a fuel such as saccharide, fuel oil and the like. This explosive slurry composition is used for blasting hard rocks and the like in situ connected with a booster or cap.