Robotic vacuum cleaner

A robotic vacuum cleaner, sometimes called a robovac or a roomba as a generic trademark, is an autonomous robotic vacuum cleaner which has a limited vacuum floor cleaning system combined with sensors and robotic drives with programmable controllers and cleaning routines. Early designs included manual operation via remote control and a "self-drive" mode which allowed the machine to clean autonomously. Marketing materials for robotic vacuums frequently cite low noise, ease of use, and autonomous cleaning as main advantages. The perception that these devices are set-and-forget solutions is widespread but not always correct. Robotic vacuums are usually smaller than traditional upright vacuums, and weigh significantly less than even the lightest canister models. However, a downside to a robotic vacuum cleaner is that it takes an extended amount of time to vacuum an area due to its size. They are also relatively expensive, and replacement parts and batteries can contribute significantly to their operating cost. In 1956, the 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." In 1969 on 2 April an episode of The Avengers was broadcast in which the character Inge Tilson played by Dora Reisser says "...I saw a demonstration once. A robot vacuum cleaner. It swept around the house, went back into its cupboard, automatically plugged in and recharged itself...". The teleplay for this episode which was entitled "Thingumajig" was written by Terry Nation. It was episode 27 of Season 7. In 1985, Tomy released the Dustbot as a part of their Omnibot line of toys. Dustbot was the first robot to feature a built in vacuum, and was able to turn when it sensed an edge or ran into something.