Abstract: Sporadic malfunctions of the closing resistor mechanism employed in a power circuit breaker to connect a resistor in parallel with the breaker contacts (prior to closing of such contacts) is prevented by providing an improved control and actuating means for the resistor mechanism which insures that the latter is reliably reset for use each time the breaker is operated. A self-adjustable component, such as a spring-loaded link, is inserted in the tie-rod structure which couples the breaker operating lever to the closing resistor operating lever. The resulting "elastic" coupling action automatically positions the levers in the proper relationship for resetting of the resistor mechanism despite small variations in the complete-open position of the breaker operating mechanism and linkage system.