Link Aviation Devices

Link Aviation Devices Inc. of Binghamton, New York.
Founded and headed by Ed Link.
The term Link Trainer, also known as the "Blue box" and "Pilot Trainer" is commonly used to refer to a series of flight simulators produced between the early 1930s and early 1950s by the Link Aviation Devices, Inc. These simulators became famous during World War II, when they were used as a key pilot training aid by almost every combatant nation.[1]
By 1969 was the Link Division of Singer-General Precision Inc of USA. Link was the largest producer of flight simulators in the Western World[2]