442 FARM MOTORS 



springs are so adjusted that when a jar comes upon the 

 engine the teeth will mesh as shown in Fig. 322, then if 

 there were no jar upon the engine and the springs were 

 carrying it in its normal position, the gears A and B 

 would not mesh, or else they would mesh just enough so 

 that the teeth would catch and strip. If a spring could 

 be placed so the combination of gears A, B, and C would 



B 



FIG. 322 



rise and fall together in a circle whose radius is equal to 

 the sum of the radii of the wheels C and D, it would be 

 as effective and the wheels C and B would mesh. Fig. 

 323 shows the type of mounting which has this desired 

 effect, but it has the additional complication of radius 

 and cross links. As the springs respond to the jars of 

 rough roads, these links keep the gear wheels the proper 

 distance apart, so that they are always in proper mesh. 



