In response to an excellent question that Venus posed on another thread, I thought its own thread was in order , particularly as I was very surprised to find out that other companies such as Bosch & Miele also had Keyplate machines..
Hoover UK where the first to bring the Keyplate Technology to market, producing in 1961 the "Automated Hoover Keymatic", the Keyplate was a burgundy coloured bakelite plate with four progs on each side giving eight in all, simply insert the card in and press start....
It was marketed as "Any Fabric Yet To Be Developed" could be washed in this machine, "Simply By Buying A New Keyplate", but as newer machines where made and newer fabrics introduced it didnt quite work out like that....You couldnt use a Keyplate from the first or second series on any other machine or vice versa!!!
Version 1, Hoover 3224, Produced 1961

Hoover UK where the first to bring the Keyplate Technology to market, producing in 1961 the "Automated Hoover Keymatic", the Keyplate was a burgundy coloured bakelite plate with four progs on each side giving eight in all, simply insert the card in and press start....
It was marketed as "Any Fabric Yet To Be Developed" could be washed in this machine, "Simply By Buying A New Keyplate", but as newer machines where made and newer fabrics introduced it didnt quite work out like that....You couldnt use a Keyplate from the first or second series on any other machine or vice versa!!!
Version 1, Hoover 3224, Produced 1961
