Analog robot
An analog robot is a type of robot which uses analog circuitry to go toward a simple goal such as finding more light or responding to sound. The first real analog robot was invented in the 1940s by William Grey Walter. The name of these robots were ELSIE and ELMER (Electro Mechanical Robot). The original circuitry was developed using two vacuum tubes and a photocell to search and follow a light. Recently a kind of analog robots was developed by Mark Tilden.
Inland Fisher Guide Plant (New Jersey)
In 1961, the facility became the first commercial user in the United States to use a programmable industrial robot to replace human workers, installing the Unimate automated hydraulic arm developed by George Devol and Joseph Engelberger. It carried units of aluminum door handles and other automotive components weighing as much as into cooling pools; such units had just been die cast from molten metal, and the use of robots eliminated the risks to employees of handling extremely hot metal pieces. A task previously performed by three shifts of employees was converted to be done by the robot. The first production Unimate was donated to the Smithsonian Institution in 1971 after being used for 100,000 hours during its 10 years of continuous operation at the Ewing plant.