FACTOKY ENGINE. 



means of which the motion of the beam in the arc of a circle is 

 rendered compatible with that of the piston-rod in a straight line. 



Fig. 26. 



h, the pin on the end of the beam connected with the end of the 

 piston-rod by the joint h g. 



b, the pin on the beam connected with the piston-rod of the air 

 pump by the joint b d. 



H, the pin on the working end of the beam. 



o, a rod called the connecting rod, by which the end H of the 

 beam is connected with a crank or winch upon the main shaft, to 

 which it is required to impart rotation. 



D 2 35 



