I 
6 CARLO TROMBETTI 
the main tension (115 volts) to meet the requirements of the transistorized ser 
vo-amplifier (see later). 
Let us connect now each stator winding of the synchro-transmitter to the 
corresponding stator winding of the synchro-receiver and let us suppose the rotor 
of the synchro-transmitter to be motionless (fig. 3) : the alternate currents induced 
into the stator windings of the synchro-transmitter as their circuit closes through 
Dagli assi X (oY) 
del restitutore 
1 
At movimento X (0 YJ del 
tavolo 
I * 
Fig. 3 - Diagram of an electronic synchro system for the control of a drawing table 
Schema di un asservimento elettronico a trasmissione sincronica per tavolo tracciatore 
the stator windings of the synchro-receiver, taken all together, create, in the 
rotor cavity of the latter, a magnetic field whose direction is the same as that of 
the inductor field of the synchro-transmitter.