AUTOMATIC MACHINE GAGING 



715 



it. These are for the purpose of ejecting defective parts so that if a 

 part fails to meet the test at any position an electrical contact is 

 closed which through the electro-magnets sets a trip at the next 

 succeeding position of the chuck, and when the defective part reaches 

 this position it is ejected from the chuck and through one of the tubes 

 G falls into the proper compartment of the container /. At the 12th 

 position the good parts are released from the chuck and fall into the 

 pan K. 



A multiple lever gage for this class of work is shown in Fig. 4, which 

 shows the gage for length of pin X and also tests the strength of a 



Fig. 7 



soldered joint between pin X and sleeve Y. A is the body carrying 

 two sliding members B and C. B carries the gaging mechanism and 

 electrical contacts. B& is a preliminary centering guide for the heat 

 coil. Centering slides D, D carried in B are normally held open by 

 springs (not shown). A is normally lifted in C by springs Ai. Slide 

 B is normally held down on A by means of spring Ai. 



As the entire gage {A, B, C, D) descends, the heat coil is centered 

 approximately by B(,. Then slide C is restrained by an anvil E, and as 

 A continues downward the slides D, D are closed by the beveled 

 surfaces CiDi, thereby centering coil and providing the gaging surface 

 for the shoulder formed by the sleeve. As A continues downward, the 

 gaging surfaces on D, D engage the shoulder and the pressure for 

 operating the gage mechanism is transmitted from A to B through 



