The dimensions of the studs, Fig. 18, can be determined from the other drawings and from the knowledge that the yoke must be supported from a groove cut into the bearing casting. This stud must be insulated entirely from the yoke. It will be seen that two shoulders are provided. A nut, Fig. 17b, will be used to draw the first shoulder up against the yoke in the slot provided. Molded insulation, Figs. 17a, is placed over the stud between the shoulder and yoke and between the nut and the yoke. The stud can then be rigidly supported by the yoke but thoroughly insulated from it. The other shoulder, with a proper nut, is used for connecting alternate studs electrically by means of the bus rings.

Bus Rings And Connecting Lugs

These bus rings, Figs. 13 and 14, consist of copper bars bent into arcs of circles so as to span studs 120 degrees apart. Slotted lugs, Fig. 15, are soldered and riveted to these bars so that these slots will fit over the stud and can be drawn up against the shoulder by nuts. Thus three studs are connected together by each ring. Note that the lugs are offset so that one ring can be assembled with the lugs projecting in one direction, and the other ring with the lugs projecting in the opposite direction. This gives clearance between the bars which will be of opposite polarity.

Terminal Strips

Terminal strips, Fig. 16, are also soldered and riveted to the rings at convenient points so that the external connections can be bolted to them.