Abstract: The present invention is a casting product reduction apparatus that applies reduction to a casting product drawn from a mold with a sufficient reduction force and thereby can surely decrease center segregation and porosity and suppress occurrence of internal cracks so as to manufacture a high-quality casting product and includes: a pair of casting product press rolls that hold and press the casting product therebetween; backup rolls that support the casting product press rolls; and a pair of frames arranged to face each other, wherein three or more sets of the casting product press roll and the backup roll are arranged in a casting product drawing direction on each of the frames, and wherein a reduction means that decreases and increases a distance between the frames is provided at two or more places on the pair of frames.

Abstract: The present invention is a casting product reduction apparatus that applies reduction to a casting product drawn from a mold with a sufficient reduction force and thereby can surely decrease center segregation and porosity and suppress occurrence of internal cracks so as to manufacture a high-quality casting product and includes: a pair of casting product press rolls that hold and press the casting product therebetween; backup rolls that support the casting product press rolls; and a pair of frames arranged to face each other, wherein three or more sets of the casting product press roll and the backup roll are arranged in a casting product drawing direction on each of the frames, and wherein a reduction means that decreases and increases a distance between the frames is provided at two or more places on the pair of frames.

Abstract: A circuit breaker includes a compressive turning spring hung between a movable contact arm pivoted at an end to a handle rotatably mounted to a first reference position and a cradle pivotably mounted to a second reference position and disengageably locked to an abnormal current detection and trip mechanism. Under normal operation of the breaker, the turning spring exerts a contact pressure between movable and fixed contacts. Upon detection of an abnormal current, the turning spring is caused to turn so as to open the contacts. With this arrangement, the dispositions of constituent elements and their interlocking assembly can be simplified.