THE ENGINE PROPER. 



57 



The Governor. The "throttling" governor regulates the 

 speed of the engine by limiting the amount of steam admitted 



to the cylinder. It consists of balls 

 which tend to fly apart when in 

 motion, which tendency is resisted 

 by springs. The cut shows how 

 the valve closes as the balls move 

 apart. The valve connection to the 

 stem is flexible, but has no play 

 endwise, thus allowing the valve 

 to align itself by its seat. 

 FIG. 16. GOVERNOR. Speed. To increase the speed 



of the engine, loosen the check nut at the top of the governor 

 and turn the screw up. To decrease the speed, screw it down. 

 Be sure to set the check nut tight after altering. 



Packing. For packing the stuffing box, candle wicking 

 is excellent ; soaked in a mixture of tallow and black lead 

 or graphite, it will work well and last a long time. Do not 

 screw the stuffing box down too hard on the packing. It is 

 well to allow a slight leakage to insure it's not being too tight. 

 Oiling the Governor. Oil the governor thoroughly with 

 good oil, especially the shaft and barrel. If oil has been used 

 which gums or causes the parts to stick, a little benzine or 

 kerosene poured into the oil holes, once a week after shutting 

 down, will keep the parts clean and in good order. 



The Governor Belt. Use a thin flat belt and see that the 



