Automatic restarting arrangement for electrically driven irrigation pumps

Claim 1

IN AN ELECTRICAL SYSTEM WHICH INCLUDES A SOURCE OF ALTERNATING CURRENT CONNECTED THROUGH A MAGNETIC STARTER TO A LOAD, THE STARTER HAVING A STARTER SOLENOID AND SWITCHES RESPONSIVE THERETO, AN ARRANGEMENT FOR AUTOMATICALLY RECONNECTING THE STARTER SOLENOID WITH THE SOURCE FOR A PREDETERMINED INTERVAL AND AT A POSITIVELY DETERMINED TIME DELAY FOLLOWING AN INTERRUPTION OF THE ALTERNATING CURRENT RESULTING IN OPENING OF SAID SWITCHES, SAID ARRANGEMENT COMPRISING, IN COMBINATION, A SOLENOID CONTROL CIRCUIT INCLUDING SAID STARTER SOLENOID AND SAID SOURCE, A CONTROL RELAY, SAID RELAY HAVING A NORMALLY OPEN CONTACT IN SAID CONTROL CIRCUIT BETWEEN SAID SOURCE AND THE STARTER SOLENOID, SAID CONTACT OPERABLE UPON CLOSING OF SAME TO ELECTRICALLY CONNECT SAID STARTER SOLENOID WITH SAID ALTERNATING CURRENT SOURCE, A CAPACITOR, POWER CONVERSION MEANS CONNECTED WITH SAID SYSTEM THROUGH SAID STARTER AND PROVIDING A SECOND SOURCE OF POWER AT TIMES WHEN SID SWITCHES ARE CLOSED, AN OPERATING RELAY CONNECTED WITH SAID SECOND SOURCE AND ENERGIZED BY SAME AND HAVING A TWO-POSITION OPERATING CONTACT, SAID OPERATING RELAY SO CONSTRUCTED THAT THE OPERATING CONTACT ASSUMES A FIRST POSITION UNTIL THE VOLTAGE IMPRESSED ON SAID OPERATING RELAY DROPS BELOW A PRESELECTED VALUE, AT WHICH TIME SAID OPERATING CONTACT AUTOMATICALLY SHIFTS TO ITS SECOND POSITION, CIRCUIT MEANS GOVERNED BY SAID OPERATING CONTACT AND CONSTRUCTED TO CONNECT SAID CAPACITOR WITH SAID SECOND SOURCE WHEN SAID OPERATING CONTACT IS IN SAID FIRST POSITION AND WITH SAID CONTROL RELAY WHEN SAID OPERATING CONTACT IS IN SAID SECOND POSITION, SAID PRESELECTED VOLTAGE VALUE BEING HIGH ENOUGH THAT THE VOLTAGE FROM THE CAPACITOR IS SUFFICIENT TO ENERGIZE SAID CONTROL RELAY TO THE EXTENT NECESSARY TO CAUSE CLOSING OF ITS ASSOCIATED CONTACT, AND KNOWN RESISTANCE MEANS CONNECTED IN PARALLEL WITH THE CAPACITOR WHEREBY TO OBTAIN A POSITIVELY CONTROLLED RATE OF DECAY IN SAID CAPACITOR.