Patent ID: 7402766

Claim:
A transfer switch for transferring a supply of electrical power to a load between a utility source and a generator that generates electrical power when started, the load interconnected to the utility source through a first circuit breaker and to the generator through a second circuit breaker, each of the circuit breakers movable between an on position and an off position, the transfer switch comprising: a first arm movable between a first position and a second position wherein the first arm is engageable with the first circuit breaker for moving the first circuit breaker from the off position to the on position; a second arm movable between a first position and a second position engageable with the second circuit breaker for moving the second circuit breaker from the off position to the on position; a control structure for urging the first and second arms to the second positions; a bar extending between the first and second circuit breakers, the bar moving the second circuit breaker to the off position when the first circuit breaker moves to the on position and moving the first circuit breaker to the off position when the second circuit breaker moves to the on position; wherein: the control structure includes a rotatable arm selectively engageable with one of the first and second arms to move the one of the first and second arms to the second position; and the rotatable arm is axially movable between a retracted position and an extended position and wherein the control structure includes a biasing structure for urging the rotatable arm towards the extended position.