1082 THE BELL SYSTEM TECHNICAL JOURNAL, SEPTEMBER 1954 



Fig. 21 — Repeater mounting shelves. Upper for 19-inch bays, lower for 23-inch 

 bays. 



All external connections, to either type of repeater, are made through 

 a male connector rigidly mounted into the repeater chassis, as shown in 

 Fig, 20. The matching female socket is suspended in the mounting shelf, 

 on a floating assembly, to relieve the strain on contacts and wiring when 

 the repeaters are plugged into a shelf. Both connector units consist of 

 molded rectangular phenolic blocks equipped with 15 gold plated con- 

 tacts. Proper alignment between the male and female connectors is 

 maintained by using a positioning key and guide pin on the repeater 

 chassis, shown in Fig. 20, and a track on the mounting shelf. After a 

 repeatei- is seated into its shelf position it is made secure by means of a 

 screwdriver operated quick-acting fastener. 



