CATALOG OF THE MECHANICAL COLLECTIONS 41 



boiler was of copper, weighed 4,399 pounds, and was constructed by 

 Cave & Son, of London, England. The boiler was approximately 

 40 inches in diameter, the flue about 14 inches. 



THE CHANCELLOR LIVINGSTON DRAWING 



This is a mechanical drawing in pencil on buff drawing paper, 15 

 by 22 inches, scale % inch=l foot, somewhat torn and stained. The 

 drawing shows a section through the cylinder, condenser, air pump, 

 and boiler feed pump, with the valves and valve chests completely 

 drawn in section. The lever that drove the air pump and the linkages 

 to the feed pump and valve mechanism are shown, but the valve 

 mechanism itself is barely indicated in free-hand drawing, and the 

 connecting rod from the cross head to the crank at the side of cylinder 

 is omitted. The gear train to the flywheel shaft and the rim of the 

 flywheel are indicated. 



The engine consisted of a vertical double-acting cylinder, 40 inches 

 in diameter with a 5-foot stroke, placed upon a cylindrical condenser 

 shell of the same diameter, 3 feet tall. The piston rod extended 

 upward to a cross head the guides for which are not shown, though 

 an A-frame rising about 18 feet above the bottom of the condenser 

 shown in the drawing would have had no other purpose than to carry 

 guides for the cross head. A very long connecting rod extended 

 downward from the cross head to one end of a straight lever, the 

 opposite end of which was similarly connected to the cross head of a 

 vertical air pump, 28 inches in diameter, 30-inch stroke. The lever 

 was pivoted on a pedestal located forward of the cylinder, between 

 the cylinder and the air pump. The base of the condenser, the 

 pedestal, and the air pump were apparently bolted to the same base, 

 which contained a passage connecting the condenser with the air- 

 pump cylinder. The intake valve of the air pump was a very large 

 lift valve apparently closed by its own weight, located in the center 

 of the lower end of the cylinder. The piston of the air pump had 

 an annular port around the piston rod, wliich was closed by a lift 

 valve that slid on the piston rod. The discharge was at the side of 

 the upper end of the cylinder, through a hinged check valve into a 

 discharge chamber, which was connected to the suction of the boiler 

 feed pump. The boiler feed pump and probably the valves of the 

 engine were operated from a rod worked up and down by a vibrating 

 lever, one end of which was attached to the piston rod, the other end 

 indicated as being fixed at a point above and several feet aft of the 

 cylinder. The valves of the engine were located in a valve chest at 

 each end of the cylinder. Each valve chest was divided into three 

 parts by two poppet valves and valve seats. The central part in each 

 valve chest between the valves was connected to the passage leading 



49970—39 4 



