Abstract: The technical field of the invention is that of valves of the guillotine type for powdered, granulated or pasty products.The object is to provide such valves which are self-cleaning and therefore avoid a wedging of the guillotine plate which opposes the sealing effect of the closure of the valve by the plate.The gist of the solution of this problem resides in the fact that there are interposed, between the slideways of the body of the valve and the slidable plate straight elongated section members which are rigid with the slidable plate and are distinctly longer than this plate. These section members fill the whole of the space of the slideways and prevent the product passing through the valve from penetrating and accumulating in the slideways.The main use of the invention resides in the equipment of installations conveying powdered, granulated or particulate products.

Abstract: A submarine cable and an electric power line using such cable for transmitting electric power at high voltge from a first point adjacent the surface of a water body to a second point adjacent the surface of a water body, a portion of the cable lying in great water depths where the hydrostatic pressure is high. The cable comprises at least three sections, each section having its insulation dimensioned or selected for operation at the high voltage when subjected to the ambient pressures. The section, or sections, lying at great depths has insulation with a voltage breakdown strength which varies with pressure, the strength increasing with pressure, so that the insulation thereof may be less than would be required if the such sections were to be used under pressures less than those at the great depths.