Abstract: A guide roller apparatus has entry guide and an upper guide provided at an entrance side of an advancing path for a workpiece material to be rolled, and side rollers, upper and lower guide rollers and further tip end chips downward thereof are sequentially provided. The the workpiece is guided into grooves of rolling rollers of a rolling mill without force by the guide roller apparatus. The guide roller apparatus guides the workpiece material having a width larger than that of a caliber of the rolling roll without rolling flaw or torsion occurring in the material to be rolled.

Abstract: A multi-slider electrical assembly includes a plurality of electrical devices slidable on conductive patterns printed on a single substrate structure. The substrate structure consists of a first insulative film having the conductive patterns printed on its surface and a second insulative film having lead ciricuit patterns so that the patterns are heat-sealed at their opposed connection lands.

Abstract: A slide rheostat comprising a metal case whose lower surface is open and which is formed with a longitudinal slot in its upper surface portion, an insulating frame which includes an upper surface portion sufficiently larger in width and length than the slot and a pair of elastic engaging pieces slightly inclining outwardly of its end surface portions, an insulating substrate on which an elongate resistor and an elongate collector are formed, a slider which includes elastic metal members adapted to slide in contact with the resistor and the collector respectively, and an insulating slider carrier to which the slider is fastened. When the frame, the slider carrier and the insulating substrate are assembled with the case, the resistor and the collector are shielded from the slot of the case by the upper surface portion of the frame. The slide rheostat is installed on a mounting plate by snapping the elastic engaging pieces of the frame into a hole provided in the mounting plate.