AUTOMATIC TESTING IN TELEPHONE MANUFACTUKE 



1137 



unclamp against the compression of the helical spring, and then operates 

 an ejection arm which drives the network horizontally out of the fixture. 

 The top rollers of several of these ejection arms can be seen in the fixtures 

 at the front of the machine in Fig. 2. 



The measuring circuits associated with the various test positions are 

 straightforward. If there is a dielectric failure in one of the breakdown 

 tests at position 8 or 9, the current through a relay coil in series with the 



C>^ 



CABLE TO 

 BRUSHES 



Fig. 3 — Test fixture, loaded. 



