1270 THE BELL SYSTEM TECHNICAI JOURNAL, NOVEMBER 1954 



CONTACT SHUNTS 

 (GOVERNOR RECEIVER DURING 



PULSING 



CONTACTS 



Fig. 2 

 left. 



Simplified diagram of 7-type dial mechanism; governor appears top 



As shown in Fig. 3, the weights of the new governor are free to pivot 

 at the ends of the fly-bar which, in turn, is allowed to rotate with respect 

 to the shaft. Rotation is imparted to the system by the drive-bar which 

 presses against each weight at a specific point. As the mechanism begins 

 to rotate during dial run-down, the two weights are caused by centrifugal 

 force to move outward against the tension of a spring. Movement of the 



