Electrical control systems

Claim 1

AN ELECTRICAL CONTROL SYSTEM FOR SELECTIVELY CONNECTING AND DISCONNECTING A LOAD RELATIVE TO AT LEAST TWO LINES OF A SUPPLY SOURCE COMPRISING A CONTROL RELAY HAVING A WINDING CONNECTED TO ONE OF SAID SUPPLY LINES AND A PLURALITY OF ARMATURES, ONE SERIALLY CONNECTED BETWEEN EACH OF SAID SUPPLY LINES AND SAID LOAD, SWITCH MEANS CONNECTED BETWEEN SAID CONTROL RELAY WINDING AND SAID ONE LINE, A SECOND RELAY HAVING A PAIR OF OPPOSITELY WOUND WINDINGS CONNECTED IN SERIES TO SAID FIRST RELAY WINDING AND A NORMALLY CLOSED ARMATURE OPERATIVELY ASSOCIATED THEREWITH, ONE OF SAID WINDINGS, WHEN ENERGIZED, ACTING TO REPEL SAID ARMATURE TO ITS OPEN CIRCUIT CONDITION, THE OTHER OF SAID WINDINGS, WHEN ENERGIZED, ACTING TO ATTRACT THE ARMATURE TO ITS CLOSED CIRCUIT CONDITION, A FIRST SWITCH MEANS CONNECTED TO THE WINDINGS OF SAID FIRST RELAY, A TRANSFORMER HAVING A PRIMARY AND A SECONDARY WINDING, SAID PRIMARY WINDING BEING CONNECTED TO SAID FIRST SWITCH MEANS AND TO ONE OF SAID SUPPLY LINES, A CONDITION RESPONSIVE SWITCH CONNECTED IN PARALLEL WITH SAID PRIMARY WINDING, SAID SECONDARY WINDING BEING CONNECTED IN PARALLEL WITH SAID DISCONNECT WINDING OF SAID SECOND RELAY, NORMALLY OPEN RESET SWITCH MEANS CONNECTED IN SERIES BETWEEN SAID CONNECT WINDING AND ONE OF SAID SUPPLY LINES, THE ARMATURE OF SAID SECOND RELAY BEING CONNECTED IN PARALLEL WITH THE SERIES CIRCUIT DEFINED BY SAID CONNECT WINDING AND SAID SECOND SWITCH MEANS.