Patents Assigned to Acieries de Gennevilliers Anciens Establissements C. Delachaux
  • Self-opening closure for the discharge aperture of a crucible
    Patent number: 4149704
    Abstract: A self-opening closure for the discharge aperture of a crucible containing an aluminothermic mixture for welding, the closure comprising a pellet of a solid, e.g. asbestos, having good mechanical resistance and which is not degassed by heating, a thermal conductivity below 2 kcal/m.h. .degree. C. and a fusion temperature below 1600.degree. C. The discharge aperture is formed in a detachable socket, one end of the discharge aperture having a part with a greater diameter to receive the pellet which forms the closure.
    Type: Grant
    Filed: June 12, 1974
    Date of Patent: April 17, 1979
    Assignee: Acieries de Gennevilliers Anciens Establissements C. Delachaux
    Inventor: Dominique de Savigny