Page:The Russell Engine-Four Valve Automatic Cut Off.djvu/10



Fig. 15 gives such a clear idea of the construction of the connecting rod that but very little remains to be said about it. It is made of forged steel, and its length from center to center of boxes is six cranks. An especial feature of this rod is that the wear in the boxes is taken up in the maintaining the length between centers always the same, which in the case of small clearance is an important feature.

Fig. 16 shows the cut—off eccentric strap and rod. The eccentric strap is lined with anti-friction metal and is provided with means for lubrication with either liquid or solid oil at the pleasure of the operator. The length of the eccentric rod is adjustable at the strap by the round and hexagonal nuts shown in the engraving. The boxes at the other end of rod are adjustable for wear by raising or lowering the wedge block controlled by a screw at top and one at bottom of rod.

In Fig. 17 is shown the main eccentric rod with our latest improved drop hook. To unhook it the crank handle is moved upward and back over the end of the rod, which movement lifts the hook clear off the box and hence disconnects eccentric rod from rocker arm, and allows it to ride back and forth without engaging.

Fig.18 Main eccentric strap is in all particulars except size like the cut—off strap shown in Fig. 16 and all adjustments are made in the same manner.

Figs. 19 and 20 are main and cut—off eccentrics. They are made in halves to facilitate taking them off or putting them on to the shaft, as, for instance, in changing direction of speed.

Fig. 19 has simply to be taken off and turned around, when the key will place it in proper position for the other direction. The design of our fly-wheels will be found to be liberal; the rim is of ample weight for the speed and power developed, the arms and hub are made with special reference to avoiding those initial strains set up in castings of this kind when inn/de without knowledge of or reference to data obtainable only by a large number of experiments and a long actual experience in the making of fly—wheels. When for any reason a fly—wheel smaller in diameter than the one given in the tables is required, we make it much heavier in order to obtain the same results in regultation as with the larger or standard wheel.