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Patentansprüche:Patent claims:1. Absperrschieber für Ofenrohre, dadurch
gekennzeichnet, daß der Absperrschieber eine durch Gewicht in die Offenstellung fallen ]_
Schieberplatte (4) aufweist.1. Gate valve for furnace pipes, thereby
marked that the gate valve falls into the open position by weight] _
Has slide plate (4).2. Absperrschieber für Ofenrohre nach Anspruch 1, dadurch gekennzeichnet, daß Ak
Schieberplatte (4) durch eine leicht lösbare Halterung in ihrer Schließstellung gehalten ist.2. Gate valve for furnace pipes according to claim 1, characterized in that Ak slide plate (4) is held in its closed position by an easily releasable holder.3. Absperrschieber für Ofenrohre nach Anspruch 2, dadurch gekennzeichnet, daß die
Halterung als eine in der Schieberplatte (4) an geordnete Bohrung (6) and Haken (7) ausgebildet
ist.3. Gate valve for furnace pipes according to claim 2, characterized in that the
Bracket designed as a bore (6) and hook (7) in the slide plate (4)
is.4. Absperrschieber für Ofenrohre nach Anspruch 1, dadurch gekennzeichnet, daß die
Schieberplatte (4) mit einem Gewicht (8) versehen ist.4. Gate valve for furnace pipes according to claim 1, characterized in that the
Slide plate (4) is provided with a weight (8).
Ethylenediaminetetraacetic acid derivatives,their salts and heavy metal chelates,their production and compositions for the control of metal-deficiency phenomena in biological plant systems
Device with at least one cylinder in which a piston-like body is movable and the seal between the body and the cylinder wall is formed by a rolling diaphragm