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BELL SYSTEM TECHNICAL JOURNAL 



operated at its maximum speed at all times and permits the operator to 

 do other work while the accumulated tape is running through the 

 transmitter. Also the same tape can be run through several tape 

 transmitters and thus be used for sending the message over several 

 circuits. 



The reperforator is a receiving device which records the message on a 

 perforated tape similar to that produced by a perforator unit. This 

 permits storing a received message for immediate or subsequent 

 retransmission to other circuits without retyping it. 



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D D 



1=1 IXL F^ f^ 



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Fig. 6 — Teletypewriter equipment layout in large office. A, Reperforator; B, 

 Transmitter distributor; C, Tape teletypewriter; D, Page teletypewriter; E, Loop 

 switchboard; F, Motor generator set; G, Radial transmitting board; //, Remote con- 

 trol box; K, Perforator. 



The smaller teletypewriter stations of the Department of Commerce 

 and those of the various transport companies are generally provided 

 with one or two teletypewriters. At the larger teletypewriter stations 

 of the Department of Commerce a special arrangement of the equip- 

 ment has been provided to permit efficient operation of the tele- 

 typewriter circuits from the standpoints of requiring the fewest opera- 

 tors and of obtaining rapid retransmission of messages received on 

 one circuit to one or more of the other circuits as required. A view 

 of an installation is given in Fig. 5 and a typical floor plan arrangement 

 is illustrated in Fig. 6. The apparatus is mounted on tables specially 

 designed for the purpose, and these are usually arranged on the floor 

 in the shape of a U, the units facing inward so that the operators work 

 inside the U. 



