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BELL SYSTEM TECHNICAL JOURNAL 



individually driven by the motor M belted to the reducing gear R 

 which is attached to the main shaft S. The turntable D is given an 

 intermittent motion by a Geneva gear and the turret head T has a 

 vertical reciprocating motion from the cam C on the main shaft 

 through the roller E. The cams F are used for operating a series of 

 electrical contacts which work in synchronism with the other parts of 

 the machine controlling the sequence of testing operations and the 

 disposition of parts. 



The frame is built of welded structural steel. The turntable may be 

 fitted with a variety of chucks or holding fixtures and the turret with 

 various forms of gages or testing apparatus. The cams and gear ratios 

 may be changed to accommodate a wide range of testing requirements. 

 Space is provided at K for a hopper or other feeding device. This 

 type of machine is suitable for multiple tests on parts requiring special 

 holding fixtures. 



Multi-Unit Testing Machine — Semi-Automatic Feed 



An entirely different type of gaging and testing machine is shown in 

 Figs. 10 and 11, which, as illustrated, is equipped for testing porcelain 



Fig. 10 



protector blocks used for protecting telephone apparatus against high 

 voltage electrical currents or static discharges. 

 These are porcelain blocks Ij in. x f in. x ^.j in., having a recessed 



