Connie1950s Robot Vacuum Prototype from the RCA-Whirlpool Miracle Kitchen.
In 1956 American science fiction author Robert A. Heinlein described the concept of a robotic vacuum cleaner with a recharging dock in his novel The Door into Summer: "Basically it was just a better vacuum cleaner .... It went quietly looking for dirt all day long, in search curves that could miss nothing .... Around dinner time it would go to its stall and soak up a quick charge."
The following year engineer Donald Moore filed a patent for robotic appliances, including a sweeper, that could follow a track laid below the floor. Whirlpool demonstrated the concept at the 1959 American National Exhibition but did not bring it to market.