Abstract: Provided is a method of vacuum deposition to deposit at least two functional coatings to a substrate, including (a) evaporating a first film forming material from a first evaporation source disposed in a vacuum deposition chamber, (b) depositing the evaporated first film forming material on a substrate located above the first evaporation source to form at least a portion of an anti-reflective coating on the substrate, (c) evaporating a second film forming material from a second evaporating source disposed in the vacuum deposition chamber, and (d) depositing the evaporated second film forming materials on the substrate located above the second evaporation source to form a hydrophobic coating on the substrate.

Abstract: This method is for orientating the blades (40) of a turbine (4) past a non-reachable range of positions (?1, ?2) in a power plant (2), said blades (40) being rotatable around orientation axes (X40) distinct from a rotation axis (X) of the turbine (4), the turbine (4) comprising means (42, 44, 46) for orientating the blades (40), said means being adapted to exert an adjustable torque on the blades (40).

Abstract: The invention relates to a method of retrofitting a vacuum deposition chamber of an apparatus for coating optical substrates, the vacuum deposition chamber comprising a second resistance evaporator crucible. The method comprises installing a resistance evaporator comprising a crucible into the operational vacuum deposition chamber such that the crucible is disposed above the vacuum deposition chamber floor, and such that the second resistance evaporator crucible is closer to the vacuum deposition chamber floor than the installed crucible.

Abstract: A method of preparing a lens blank for a further operation of surfacing to transform the lens blank into a surfaced lens for further transformation into a lens having a lens shape, the operation of surfacing including processing the lens blank so that the surfaced lens exhibits a crib diameter, the method being implemented using a processing module and comprising: based on input data (ID) which define the lens shape, defining a temporary crib diameter (Dtemp) so that said temporary crib diameter satisfies a set of constraints which includes at least: a first constraint whereby the temporary crib diameter (Dtemp) is large enough for the surfaced lens having said temporary crib diameter to be suitable to be processed into said lens, a second constraint whereby the temporary crib diameter is large enough for the surfaced lens having said temporary crib diameter to include a plurality of reference points defined on the lens blank and which together identify an optical center of the lens, choosing the crib diamete

Abstract: Embodiments of the present invention generally relate to a runner unit of a tidal power plant, and more particularly to a device for reversing a blade of the runner unit. The device according to the embodiments is lighter and more efficient with respect to known solutions which involve articulated mechanisms as it is based on a reversing servomotor including an annular piston which acts on the blade to be reversed.

Abstract: Vapor deposition apparatuses and methods for coating a substrate with at least two functional coatings that include a hydrophobic coating are described herein. Some embodiments include a vapor deposition apparatus with at least a first evaporator and a second evaporator, where the evaporator configured to apply the hydrophobic coating is raised above the other evaporator and is thus closer to the substrate. Others include methods of coating a substrate with such evaporators and different distances. Embodiments of the present disclosure can be useful for coating eyeglass lenses. Still others are disclosed.

Abstract: This method is for orientating the blades (40) of a turbine (4) past a non-reachable range of positions (?1, ?2) in a power plant (2), said blades (40) being rotatable around orientation axes (X40) distinct from a rotation axis (X) of the turbine (4), the turbine (4) comprising means (42, 44, 46) for orientating the blades (40), said means being adapted to exert an adjustable torque on the blades (40).

Abstract: Vapor deposition apparatuses and methods for coating a substrate with at least two functional coatings that include a hydrophobic coating are described herein. Some embodiments include a vapor deposition apparatus with at least a first evaporator and a second evaporator, where the evaporator configured to apply the hydrophobic coating is raised above the other evaporator and is thus closer to the substrate. Others include methods of coating a substrate with such evaporators and different distances. Embodiments of the present disclosure can be useful for coating eyeglass lenses. Still others are disclosed.

Abstract: Embodiments of the present invention generally relate to a runner unit of a tidal power plant, and more particularly to a device for reversing a blade of the runner unit. The device according to the embodiments is lighter and more efficient with respect to known solutions which involve articulated mechanisms as it is based on a reversing servomotor including an annular piston which acts on the blade to be reversed.

Abstract: This valve is integrated into a fluid distribution network and enables selective interruption or authorization of the circulation of a fluid. The valve includes a fluid blocking member driven in rotation by an actuator device of the valve and at least one journal, a hollow body inside which the blocking member is mobile and which defines at least one bore for receiving the journal, and a bearing disposed around each journal and inside the bore of the body enabling support of the journal and guidance thereof in rotation relative to the bore, thereby centering the journal. The valve further includes a device for immobilizing and sealing for maintenance the journal relative to the body of the valve. This immobilization device is disposed on the same side of the bearing as the internal volume of the hollow body and is maneuverable via the bearing to go from a non-clamped first configuration to a clamped second configuration in which it immobilizes the journal in the bore and vice versa.

Abstract: This valve is integrated into a fluid distribution network and enables selective interruption or authorization of the circulation of a fluid. The valve includes a fluid blocking member driven in rotation by an actuator device of the valve and at least one journal, a hollow body inside which the blocking member is mobile and which defines at least one bore for receiving the journal, and a bearing disposed around each journal and inside the bore of the body enabling support of the journal and guidance thereof in rotation relative to the bore, thereby centering the journal. The valve further includes a device for immobilizing and sealing for maintenance the journal relative to the body of the valve. This immobilization device is disposed on the same side of the bearing as the internal volume of the hollow body and is maneuverable via the bearing to go from a non-clamped first configuration to a clamped second configuration in which it immobilizes the journal in the bore and vice versa.

Abstract: A bellows for connecting hoses or apparatus operating in a partial vacuum including a corrugated tube reinforced on the outside by rings at the troughs of the corrugations. The tube further includes toric reinforcing rings on the inside of the crests of the corrugations, the length of the rings being adjustable so as to adapt to the deformation of the corrugations in service.

Abstract: The present invention concerns a method and a composition for accelerating the setting of Portland cement, shortening the migration phase of calcium ions into the liquid phase and complexing the lime of the Portland cement, whereby the said composition is essentially formed from the following constituents: a calcium aluminates- and trihydrated alumina-based material.

Abstract: A refractory plaster containing semi-hydrated calcium sulphate, mineral fibres and a mineral filler material. This plaster has outstanding fire-retardant properties at temperatures of up to 1400.degree. C. and can be used as a refractory material, while being adapted to be used in a manner similar to that of a conventional plaster.

Abstract: A refractory cement with outstanding mechanical properties contains 10 to 30 parts by weight of C.sub.4 A.sub.3 S clinker and 70 to 90 parts by weight of an aluminous clinker including 30 to 75% CA. This cement may be prepared by either grinding said clinkers to a specified fineness and then mixing the same, or by grinding said clinkers simultaneously and jointly to said specified fineness. The novel double clinker cement allows concrete with considerably improved refractory and mechanical properties to be prepared, as compared to the corresponding products known up to now.

Abstract: This material is an anorthite with an alumina skeleton of which the overall porosity is between 40 and 70% with a pore size such that the average diameter is between 0.75.mu. and 8.mu..To obtain it, water is mixed with a mixture of aluminous and sillicoaluminous materials with at least 10% by weight of calcium sulphate, it is dried and calcined at 1000.degree. to 1400.degree. C. The starting materials are selected so that the final product essentially comprises CaO, SiO.sub.2 and Al.sub.2 O.sub.3 with, by an SiO.sub.2 /Al.sub.2 O.sub.3 weight ratio less than 2 and a CaO/Al.sub.2 O.sub.3 weight ratio less than 1. A preferred composition corresponds to point D of the diagram.Application to replace plaster in the manufacture of moulds for the sanitary industry.

Abstract: This invention concerns a high-alumina refractory cement, which contains, in addition to ingredients adapted to form a hydraulic bond, and standard secondary ingredients, one or more ingredients adapted to form a phosphatic chemical bond.The invention concerns a high-alumina refractory cement and the process used to prepare it.

Abstract: A process of preparing a refractory hydraulic binder containing calcium aluminates, wherein45 to 65% clinker containing 45 to 72% CA phase, the balance being almost exclusively constituted by CA.sub.2 phase, and55 to 35% aluminaAre mixed in the presence of additives, all of the above-mentioned ingredients being ground.