Electrical control circuits

Claim 1

IN A CIRCUIT FOR CONTROLLING ENERGIZATION OF AN ELECTRIC MOTOR OF THE INHERENTLY PROTECTED TYPE FROM A POWER SOURCE, AN OVERLOAD RESPONSIVE DEVICE FOR PROTECTING THE MOTOR AGAINST OVERLOAD CONDITIONS, SAID OVERLOAD RESPONSIVE DEVICE HAVING NON-LOCKABLE CONTACTS WHICH OPEN IN RESPONSE TO AN OVERLOAD CONDITION AND WHICH AUTOMATICALLY CLOSE SUBSEQUENT TO ELIMINATION OF THE OVERLOAD CONDITION, A CONTACTOR FOR CONTROLLING ENERGIZATION OF THE MOTOR HAVING AN OPERATING WINDING TO BE CONNECTED IN SERIES CIRCUIT WITH SAID NONLOCKABLE CONTACTS ACROSS A POWER SOURCE, A RELAY HAVING CONTACTS CONNECTED IN SAID SERIES CIRCUIT, SAID RELAY INCLUDING MEANS DISPOSED FOR OPERATION IN RESPONSE TO OPENING OF SAID NON-LOCKABLE CONTACTS FOR OPENING THE RELAY CONTACTS TO INTERRUPT THE SERIES CIRCUIT AND FOR MAINTAINING THE RELAY CONTACTS OPEN UNTIL A MANUAL CONTACT CLOSING OPERATION IS PERFORMED, AND MEANS MANUALLY OPERABLE TO EFFECT CLOSURE OF SAID RELAY CONTACTS AND PERMIT REESTABLISHMENT OF THE SERIES CIRCUIT.