Upscale men’s shoemaker Allen Edmonds Shoe Corp based in Port Washington announced on Monday that it will be sold to a Los Angeles-based private equity firm and keep its headquarters in Port Washington. An affiliate of Brentwood Associates will take over the company from Minneapolis-based Goldner Hawn Johnson & Morrison, which bought Allen Edmonds in 2006. Founded in 1922, Allen Edmonds is one of the few remaining American shoemakers. It has 1,000 employees, about 450 of them at its headquarters in Port Washington. Officials with the company report the facility in Port Washington is adding a third production line this month which may add to job security for many employees.