372 



THE BELL SYSTEM TECHNICAL JOURNAL, MARCH 1957 



and consist of bifurcated cantilever springs, providing a total of four 

 contacts for each connection. 



As can be seen in Fig. 17, the wire connector is actually a molded phe- 

 nolic box into which are inserted all of the printed wiring boards that 

 make up a complete terminal or repeater. The terminal connectors on 

 the boards thus engage the wires that are imbedded in the back of the 

 connector. To insure contact reliability, a finish of precious metal is pro- 

 vided on both the wires of the connector and the terminal connectors on 

 the board. Additional flexibility in the interconnection of the boards is 



Fig. 17 — Prototype model of connector 

 box unequipped showing grid wires. 



Fig. 18 — Typical terminal netw( 

 mounted in a prototype connector b( 



