@misc{kelley_ledford_vassalli_cavaroc_2005, title={Power supply systems and methods that can enable an electromagnetic device to ride-through variations in a supply voltage}, volume={6,847,515}, number={2005 Jan. 25}, publisher={Washington, DC: U.S. Patent and Trademark Office}, author={Kelley, A. and Ledford, J. and Vassalli, L. and Cavaroc, J.}, year={2005} }
 @article{kelley_cavaroc_ledford_vassalli_2000, title={Voltage regulator for contactor ridethrough}, volume={36}, ISSN={["0093-9994"]}, DOI={10.1109/28.833790}, abstractNote={This paper describes a simple voltage regulator that allows contactors to ride through power line disturbances such as sags and dropouts. The voltage regulator protects critical equipment in continuous process industries and prevents loss caused by downtime. The voltage regulator is inexpensive and easily retrofitted into existing installations. A field trial of the voltage regulator has been successfully completed.}, number={2}, journal={IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS}, author={Kelley, A and Cavaroc, J and Ledford, J and Vassalli, L}, year={2000}, pages={697–704} }