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H01H53/00—Relays using the dynamo-electric effect, i.e. relays in which contacts are opened or closed due to relative movement of current-carrying conductor and magnetic field caused by force of interaction between them
Vorrichtung zum Abklopfen der Elektroden, insbesondere der Sammelelektroden bei Einrichtungen zur elektrischen Abscheidung von Schwebekoerpern aus Gasen oder Daempfen
Anordnung zur Vermeidung von Rundfunkstoerungen an schleichend arbeitenden, den Strom bei kleinem Kontaktabstand ohne Lichtbogenbildung abschaltenden elektrischen Schaltern