. The Bell System technical journal . by the directioncontrol switching mechanisms. The relays included in the directioncontrol system which switch the amplifier circuits are built in theamplifier to simplify wiring and maintenance. The speed of thedistributors is controlled as in the multiplex system by vibratingtuning forks, but in order to secure under certain conditions greaterstability and freedom from speed variations due to alteration in thefork contact adjustment and changes in room temperature and voltageof the power supply there was developed a constant temperaturevacuum tube driven
. The Bell System technical journal . by the directioncontrol switching mechanisms. The relays included in the directioncontrol system which switch the amplifier circuits are built in theamplifier to simplify wiring and maintenance. The speed of thedistributors is controlled as in the multiplex system by vibratingtuning forks, but in order to secure under certain conditions greaterstability and freedom from speed variations due to alteration in thefork contact adjustment and changes in room temperature and voltageof the power supply there was developed a constant temperaturevacuum tube driven fork. The distributor, with its driving fork, therelays included in the direction control and vibrating relay circuits,and the apparatus usually provided in land line multiplex equipmentsfor phasing and lining up the circuit, including the Morse talkingcircuit, are mounted in accessible positions on a table which is separatedfrom the operating tables on which the printers and transmitters arelocated. AUTOMATIC PRINTING EQUIPMENT 419. S1N31AID39 QNIlVygiA CZIOIIII
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
