{TAIL ~ 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 a transductor which controls the supply of a.c. voltage to {HEAD ~ a transformer} having primary, secondary and tertiary windings 
{ TAIL ~ 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 a transductor which controls the supply of a.c . voltage to { HEAD ~ a transformer } having primary , secondary and tertiary windings
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