CATALOGUE OF THE MECHANICAL ENGINEERING COLLECTION, 51 



creased, a large quantity of oil is forced through the standpipes and 

 into the cup-shaped pans, raising the oil level in the pan. As the 

 engine speed increases, the oil streams from the standpipes are en- 

 larged, and as the tubes in the connecting-rod bearing now cut 

 through the increased oil streams, the result is an automatic eleva- 

 tion of the oil line, always in proportion to the increased speed. 



The ball bearings, cylinder walls, cam shaft, valve gear, and other 

 internal parts of the engine are lubricated by the splash derived 

 from the tubes, while the wrist pins are lubricated by oil scraped 

 from the cylinder walls and led through the oil passage to the piston- 

 pin bearings. 



The water circulation is obtained with a centrifugal pump. The 

 ignition system consists of a Bosch high-tension magneto, a wire to 

 each spark plug, and a wire to the switch. The engine is equipped 

 with a Stromberg carbureter. A governor is attached to regulate the 

 speed of the motor. It is operated by a shaft, which is driven by the 

 engine cam shaft and governs the engine speed to prevent the racing 

 of the engine in low gears or when declutched. 



Cat. No. 307,254 U.S.N.M. 



MOTOR ACCESSORIES. 



Stearns and Hodgson Steam Engine Giovernor. U. S. Patent No. 9236, 

 August 31, 1852. Transferred from United States Patent Office. 



The apparatus consists of two weighted arms to the upper extrem- 

 ities of which are secured toothed quadrants working in a cylindrical 

 rack placed in the main spindle of the governor in an opening suffi- 

 ciently long to allow the rack to have a reciprocal motion equal to 

 the demand of the valve which it may govern. When set in motion, 

 the arms and their weights recede from the spindle by the centrifugal 

 force given them, and thereby cause the toothed quadrants to operate 

 on the cylindrical rack, which produces a reciprocal motion without 

 the intervention of pins, levers, or connecting links. 



Cat. No, 251,287 U.S.N.M. 



Charles Porter Steam Engine Governor. TJ. S. Patent, No. 20,894, July 13, 

 1858. Transferred from United States Patent Office. 



The apparatus is a ball-and-arm type of centrifugal governor, 

 light in weight and driven at a high velocity. It is equipped with 

 a counterpoise of a weight much greater than the aggregate of the 

 balls and arms and sufficient to balance the centrifugal force 

 developed. Cat, No, 251,289 U.S.N.M. 



