NEW BRITAIN, Conn. —The city seal shows a beehive, seven bees and a Latin motto that translates to: “Industry fills the hive and enjoys the honey.” The bees represent the companies that helped build New Britain into a robust manufacturing town, and the busiest of all was Stanley Black & Decker . Its factories once stretched for nearly a mile down Myrtle Street, pumping out millions of screwdrivers, drills and other tools that, without exaggeration, helped build America over the past two centuries. All that is left is a tape-measure plant, but not for long. Production has ended, layoffs have begun and the…