CATALOGUE OF THE MECHANICAL ENGINEERING COLLECTION. 



17 



Papin stated that a cylinder 2| inches in diameter, if thus worked, 

 could raise a weight of 60 pounds once a minute through a height 

 equal to the stroke. Cat. No. 244,888 U.S.N.M. 



Copy of Drawing of Thomas Savery's " Fire Engine " in the Philosophical 

 Transactions of the Royal Society, London, England, Volume 21, 1699. 



In 1698 Thomas Savery patented an apparatus " for raising of 

 water and occasioning motion to all sorts of mill works by the im- 

 pellent force of fire." No drawing of the arrangement was deposited 



FIG. 4. THE EARLIEST STEAM ENGINE WITH A PISTON, 1690. 



with the patent, but in the following year a model of the machine 

 was shown to the Royal Society and is illustrated in their Trans- 

 actions. 



The engine consists of a boiler and water receiver connected by a 

 pipe permitting steam to pass from the" boiler to the receiver. The 

 receiver is provided with suction and delivery pipes and the corre- 

 sponding valves. A hand-worked valve admitted steam to the re- 

 ceiver long enough to blow out all of the air. The valve was then 

 closed and water from an overhead tank was turned on to the outside 



.^)2103— 22 2 



