NEW GENERAL PURPOSE RELAY 



1031 



Tluis, if no se([ueiu'OS were re(|uire(l, the card would luive a single straight 

 surface for makes and another for breaks, and only one card variety 

 would be needed for all ('oml)inations of makes, breaks, and non-sequence 

 transfers. Where seciuences are neetled, howex-er, additional card varie- 

 ties are reciuired with steps in the actuating surfaces for the early 

 contacts. 



In order to obtain a wider variety of the contact combinations in- 

 cluding various numbers of make contacts, break contacts, sequence 

 transfers and non-sequence transfers on the same relay, it is necessary 

 to provide a variety of different coded stationary and twin wire as- 

 semblies, as well as a variety of cards, some of which are illustrated in 

 Fig. 7. The twin wire assemblies differ as to the number of twin wires 

 provided and in the position of these wires across the width of the 

 molded section. 



The stationary ^^^re assemblies are always provided with a full comple- 

 ment of twelve wires in order to support the front molded section, which 

 is held in place by spring tension in these wires. However, only certain 

 of the wires may have contacts at the ends. These stationary contacts 

 consist of base metal blocks with 0.010 inch thick precious metal sur- 

 faces on either or both sides as needed for makes, breaks or transfers, 

 and any of the three varieties may be welded to any wire. Thus precious 

 metal is pro\'ided only where needed for the particular contact arrange- 

 ments desired. 



SHOULDER FOR 

 EARLY MAKES 



QO£j CONTACTS 



STATIONARY 

 CONTACTS 



SHOULDER FOR 

 EARLY BREAKS 



UNOPERATED 



Fig. 6 — Early break-make, early make-break and non-sequence transfer con- 

 tacts, showing how early contacts are obtained by means of shoulders on the 

 actuating card. 



