NEW GKXKUAL PURl'OSK UKl.AY 



105 



AG ARMATURE AND 

 HINGE SPRING 



BUFFER SPRING 



AJ ARMATURE AND 



HINGE SPRING 



Fig. 27 — Additional parts for AG and AJ relays. 



ntcasmeiiients were made by svii'roiindiiig a control relay with eight 

 adjacent closely-spaced interfering rela^ys. The ampere tiu'ns to just 

 operate the control relay were \'aried b}^ changing the mechanical load 

 on the relay, and for each \-aliie the change caused by simultaneously 

 energizing the adjacent relays was observed. The impro\'ement of AF 

 relays with respect to the U type is seen to be of the order of ten times 

 for most of the range, with the effects of the adjacent relays being well 

 tnider 10 per cent up to 300 ampere turns. This is small enough so that 

 no shields or precautions with respect to spacing are required. 



11. AG AND A J TYPE RELAYS 



The AG and AJ type relaj's include modifications of the basic AF 

 design to provide slow release, sensitive, marginal and other additional 

 characteristics. For the most part these modifications are not extensive 

 and the assembled relays closely resemble the AF design. 



The additional parts most often used in the AG and AJ relays are 

 shown in Fig. 27. Both relays use thicker armatures with longer side 

 legs than the AF relay, and the armature of the AG relay has a spherical 

 (Miibossing instead of noiuuagnetic separators. This I'educes the magnetic 

 ciicuit reluctance of the AG relay when it is in the opei-ated position. 

 In addition, for longer release times, a metal sleeve is assembled over 

 the middle leg of the core, inside the coil. In<hi('ed edd\- curi'onfs in this 

 sl('e\'c oppose rapid changes of flux through the cor(\ 



The use of the heav}^ embossed armature and a sleeve are sufficient 



