Patent 7515029 was granted and assigned to Panasonic on April, 2009 by the United States Patent and Trademark Office.
A starter of single-phase induction motor having main winding and auxiliary winding energized by alternating current power source, including a casing, a positive characteristic thermistor connected in series to the auxiliary winding, an auxiliary positive characteristic thermistor connected parallel to the positive characteristic thermistor, a bimetal, and an enclosed compartment accommodated in the casing for enclosing the snap action bimetal and auxiliary positive characteristic thermistor.