Why do these locks have diffrent names: Simplex - Unican -Kaba - Illco and various combinations of those names?
A Short History of the Companies Involved:
The American Simplex company was founded in 1961 and produced quality push button locks. The Canadian company, Unican, recognized a good thing and bought Simplex and then the name for these locks became Unican-Simplex.
A few years later, the Independent Lock Co, ILCO, was bought by Unican and for a few years the locks were known as Ilco-Simplex.
Finally in 2001, Kaba lock company bought Ilco-Unican and the relationship became known as Kaba-Ilco. Since Kaba makes many other locks and products, the name Simplex still is needed to designate this particular line of pushbutton locks. Many people around the world including here in the UK still refer to them as Unican or Simplex Locks.
in 2016 the companies of KABA and Dorma merged to form a new company called dormakaba though at this time the lock branding has remained the same.