Arrangement with phase-dependent measurement particularly for relays

Claim 1

IN AN ARRANGEMENT FOR MEASURING THE DIFFERENCE IN PHASE BETWEEN TWO ALTERNATING CURRENT QUANTITIES PRODUCED RESPECTIVELY BY FIRST AND SECOND CIRCUIT MEANS, THE COMBINATION COMPRISING FIRST AND SECOND RECTIFIER MEANS CONNECTED RESPECTIVELY TO SAID FIRST AND SECOND CIRCUIT MEANS, FURTHER CIRCUIT MEANS INTERCONNECTING SAID FIRST AND SECOND RECTIFIER MEANS SUCH THAT THE POSITIVE AND NEGATIVE OUTPUT TERMINALS OF SAID FIRST RECTIFIER MEANS ARE CONNECTED BY FIRST AND SECOND CONDUCTORS TO THE NEGATIVE AND POSITIVE OUTPUT TERMINALS RESPECTIVELY OF SAID SECOND RECTIFIER MEANS, A SWITCHING DEVICE SUCH AS A RELAY HAVING THE WINDING THEREOF CONNECTED BETWEEN SAID FIRST AND SECOND CONDUCTORS, AND A ONE-WAY ELECTRIC VALVE ALSO CONNECTED BETWEEN SAID FIRST AND SECOND CONDUCTORS IN PARALLEL WITH SAID RELAY WINDING.