Patent 7211750 was granted and assigned to Square D on May, 2007 by the United States Patent and Trademark Office.
A switching mechanism provides sequential switching of first and second circuit breakers to enable switching between a primary power supply and a backup power supply. The switching mechanism comprises an actuating mechanism to sequentially actuate a pair of circuit breakers. The actuator mechanism including a shock absorber to absorb energy due to switching of one of the first and second circuit breakers.