Abstract: A method and apparatus of controlling the pouring spout of a tundish for molten metals, including a slide valve composed of a valve member mounted for movement between a head plate disposed on the underside of the tundish and a discharge member. For preventing in a particularly effective way any freezing of the molten metal and for avoiding any static shadow corners the valve member and/or the head plate or both in the closed and/or open or part-open position thereof are moved in such a way that a two-dimensional relative movement perpendicular to the longitudinal axis of the pouring spout is generated between the valve member and the head plate.

Abstract: An apparatus for the exact position feedback of a double-acting power piston in a hydraulic power cylinder subjected to extreme environmental conditions, especially high temperatures, comprising a double-acting detecting (measuring), or follower cylinder, having a volume corresponding to that of said power cylinder and including a detecting piston the position of which is sensed by an electrical detector, wherein a pair of working spaces of power and detecting cylinders are in fluid communication with each other via a connecting pipe, while the respective other working spaces are adapted to be connected to a (pressursized) fluid pump or a reservoir through a control valve.

Abstract: The invention relates to an apparatus for the exact position feedback of a double-acting power piston in a hydraulic power cylinder subjected to extreme environmental conditions, especially high temperatures, comprising a likewise double-acting detecting (measuring) or follower cylinder having a volume equivalent to that of said power cylinder and including a detecting piston the position of which can be sensed by electric means, wherein a pair of working spaces of power and detecting cylinders are in fluid communication with each other via a connecting pipe, while the respective other working spaces are adapted to be connected to a (pressurized) fluid pump or a reservoir through a control valve.

Abstract: Disclosed is a method of controlling the nozzle damper (slide valve) of a vessel for the metallurgical casting, in response of the variation of the molten metal level of the volume of molten metal tapped from said vessel the nozzle opening is stepwise controlled in response to, the value of the vertical level of the molten metal above said nozzle damper at the respective tapping time or after the respective tapping period with the molten metal volume calculated from the time integral of the respective previous actual damper opening areas.

Abstract: A sliding gate valve assembly for pouring liquid metal is described in which the frame that mounts the sliding plate is attached directly to oppositely spaced motor apparatus of particular design. Thus, in addition to imparting motion to the slide frame, the motor apparatus also serve to slidably mount the frame thereby eliminating the need for a housing enclosure about the slide frame. According to one aspect of the invention, the frame is movable longitudinally by motor apparatus on two opposed sides of the frame. According to another aspect of the invention, the frame is movable both longitudinally and transversely by pairs of motor apparatus rectangularly disposed about the four sides of the frame. Motor apparatus that is mechanically, electrically or fluid operated can be employed.

Abstract: A sliding gate valve for pouring molten metals has a slide carriage bearing a slide plate and a separate pouring bushing, the latter being mounted in a flanged collar and the carriage having spring loaded bolts, (i) to press the flange of the bushing collar against the slide plate and (ii) to press the slide plate against a head plate of the valve, to seal bushing to slide plate and slide plate to head plate, and the slide and head plates being identical and having identical sealing means.