FUNDAMENTALS OF TELETYPEWRITERS 639 



than typing on a tape. This perforated tape is the same as tape pro- 

 duced by a keyboard perforator as previously described, and may be 

 used in an automatic transmitter for retransmitting the message on a 

 separate circuit. The reperforator is usually associated with a re- 

 ceiving teletypewriter on a circuit and may be cut in or out manually 

 or automatically from signals transmitted along with the message 

 signals, so that it will automatically reproduce a code tape for use in 

 automatically retransmitting such messages as desired on some new 

 connection. 



Conclusion 



The fundamentals of teletypewriters, as described above, now seem 

 to be fairly well established. The future should bring simpler and 

 cheaper machines, especially where the more difficult requirements 

 do not have to be met, and probably additional attachments and 

 auxiliary features to extend the applications and convenience of 

 operation. 



