The fail safe transformer circuit 1, wherein said secondary winding of said transformer supplies the a.c. voltage signals to a rectifier for producing a d.c. control signal for {HEAD ~ a transductor} which controls {TAIL ~ the supply} of a.c. voltage to a transformer having primary, secondary and tertiary windings 
controls
The fail safe transformer circuit 1 , wherein said secondary winding of said transformer supplies the a.c . voltage signals to a rectifier for producing a d.c . control signal for { HEAD ~ a transductor } which controls { TAIL ~ the supply } of a.c . voltage to a transformer having primary , secondary and tertiary windings
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH