A Danbury company with a facility in Winsted is among three Connecticut businesses receiving a total of more than $5 million in state loans to help them expand and retain a combined 700 jobs, the state said Thursday.The Barden Corp. of Danbury, which manufactures precision bearings and operates Winsted Precision Ball at 159 Colebrook River Road in Winsted, will receive $3 million in financing and a $300,000 sales and use tax exemption, according to Gov. M. Jodi Rell's office. The notice said the financial aid will enable the company to retain 462 jobs and add 19 workers.