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358 plate-416 (Sketch IV) governs the position of the driving plate-676. As the fuel-oil control plate revolves around D as a center, the center C, about which driving plate-676 oscillates, moves up or down. As the eccentric rod-729 moves up and down, the driv- ing plate oscillates back and forth, making suction-valve tappets-693 move up and down. At the same time plunger-drive lever-700 oscillates and drives plungers-724 up and down a GOVERNOR WEIGHT- 243 BALL BEARING-357 HANDLING GEAR SHAFT-475 WoRM WHEEL- 459 I THE MARINE REVIEW When it is closed the oil must go on through the discharge valve-712. Con- sequently, the amount of fuel dis- charged is governed by the length of time the suction valve is open, and this in turn is governed by the posi- tion of center C of the driving plate. The governing is done with the same device. That is, a ball governor-243 on the cam shaft is attached through levers-371-372-378-381 and 380 to fuel- regulating device, and automatically FUEL.O/L. CONTROL PLATE - 4/6 HANDWHEEL-ASS STOn ANOWHEEL Se 'i Beit cranx RRM eS. -37/ DISCHARGE PIPE. : "2s Fu.crum on Z 2373\, -372 PIPE coupLi / { NUT ; PUSH ROD-3798 14 Sb : ) Discraréec GUIDE BRACKET-338/ VALVE "72 Lever 300 | aoe: FULCRUM PIN-382 - vasve 22 CONTROL ROD-677 - - TAPPET SHAFT LEVER-©92 oy Cees LINK ROD-685 - : if iz] Guioe Roo-609 --iZA ii ta TAPrET (4 ~" Ny SAWAFT- 6869 fF y GZ A Sy DRIVE BLOCK-697 a c Z Sucrion vai / GUIDE ROO oe TAPPET-693 SS FUEL PUMP © : a PLUNGER -724 SPRING BEARER NUT - 682. hpi fe Ltr. Zidhe LLM. \ \ Was AS Vi UPPER ECCENTRIC STRAP i -73/ é % fF CRANK SHAET . : , yy Vijye Lower Eccenreie sTRAP: oo , SAN Wi S "732 ROCKER SHAFT-696 ROCKER ARM-742 PLUNGER DRIVE LEVER-Jo0 W------L£CCENTRIC ROD |--- Ec CENTRIC-/ 94 -- DRIVING PLATE -676 -729 (C FUEL FEED PUMP AND GOVERNING MECHANISM 'constant stroke. As the center C of driving plate-676 moves down the arc through which tappet shaft lever-692 oscillates will move toward the cen- ter, suction valve tappet-693 will os- cillate lower down, and the suction valve will be closed .during a longer portion of the stroke. As C moves up, he tappet-693 will oscillate higher up and keep down the suction valve open during a greater portion of the stroke. While suction valve-707 is open, the fuel will go back to the suction line. regulates the opening of the regurgi- tating valve in the same manner as the fuel-control plate-416, and thus governs the engine. The circulating water is pumped through reciprocating pumps on the forward end of the engine geared down from the main shaft to 4/9 rev- olutions of the main engine. There is also a fuel pump for pumping fuel into the suction of the fuel-feed pumps above described. This is run from the same crosshead from which are October, 1913 run the circulating pumps. All the handling gear pumps, etc., are on the forward end of the engine. The lubri- cating-oil pump is also run from this crosshead. The cylinder lubricating oil is forced under pressure by a special lubricating manifold run from the vertical cam shaft by spiral gearing on the after end of the engine. The cam shaft is run from the main shaft by means of spiral gearing and vertical shaft. On the cam shaft are the spray cams, the scavenger cams, and the air-starting cams. The re- versing is accomplished with com- pressed air. The vertical shaft has a special: coupling with a 30-degree blank. On reversing, the upper sec- tion remains stationary till the lower section has turned through 30 de- grees when all cams are then in posi- tion for motion in the opposite direc- tion. For example, the spray valve begins to open when the crank is 2% degrees in advance of the top center and closes when the crank is 32% de- grees beyond the top center. This gives an opening of the spray valve through 35 degrees. Now by shifting the cam shaft back 30 degrees by means of this clutch, the spray valve will begin to open 2%4 degrees on the opposite side and remain open be- yond the stroke 321%4 degrees in the opposite direction, thus reversing the functions of the spray. The scaveng- ing cams are reversed by the same action of the clutch and cam shaft. Reversing the Engine The reversing is accomplished by separate cams and reversing valve, or air-starting valve, which is the same for either direction. The following is an extract from Patent No. 1,005,507, a perusal of which will facilitate the understanding of the description of the handling gear. Figure 1 is a diagram showing in section part of the engine cylinder with the starting valve, the distrib- uting valves, the operating members therefor, and the compressed air ves- sel; Fig. 2 is a similar diagram to Fig. 1, showing a modification. a is the starting valve, the cone of which is held in closed position by a spring b. The upper part of the valve cone is formed as a piston c. The conduit d from the compressed air vessel A opens laterally into the casing of the starting valve. Above the piston c the starting valve is connected by the conduit e with the two distributing valves f and g, which communicate respectively through the conduits h and i with the operating members k and 1. A conduit x connected with