Abstract: An automatic door opening system suitable for use in an electrical device having a body with an inner chamber, a door hinged to the body from one side, and a processing unit, the automatic door opening system having a rod that allows the door to open by applying a pushing force to the door while moving in a forward direction, and allows the door to be released when the rod brings into the backward position by moving in the backward direction.

Abstract: An automatic door opening system suitable for use in an electrical device having a body with an inner chamber, a door hinged to the body from one side, and a processing unit, the automatic door opening system having a rod that allows the door to open by applying a pushing force to the door while moving in a forward direction, and allows the door to be released when the rod brings into the backward position by moving in the backward direction.

Abstract: A wear part with high wear and abrasion resistance combined with unlimited weldability and good mechanical strength or toughness, comprising a composite part of hard metal portion, a cast metal alloy body portion and attached thereto to joining portion, characterized in that the joining portion consists essentially of a weldable steel which by casting is bonded to the cast metal alloy body portion to a combined mechanical-metallurgical bond is provided, as well as a method for forming such a wear part.

Abstract: This is provided an ingot mold formed of a cast iron consisting essentially of 3.7 to 4.0% C, not more than 1.6% Si, 0.40 to 0.80% Mn, 0.10 to 0.45% P, not more than 0.10% S, 0.020 to 0.050% Mg, the balance Fe with normally appearing impurities. The elements are adjusted to provide a specific carbon equivalent in the range of 3.2 to 3.6% calculated as C.sub.eqv =%C+0.65% Si+0.35% P-35% Mg. In addition, the ingot mold structure of the present invention contains an amount of not more than 5% by volume of carbide, an amount of not more than 25% by volume of ferrite and at least two-thirds of the total graphite volume being spheroidal graphite with the balance pearlite.