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.
Robot Patent
The Robot Patent is an English-language scholarly term for the imperial decrees (patents) in the 1700s abolishing compulsory labor (robot) of serfs, issued by Joseph II, Holy Roman Emperor, who had carried out a register of all land with a division between peasant and noble holdings.
Joseph II outlawed the buying of 'rustic' land by the nobility and at the same time giving the rusticalists security of tenure. His motive was to prevent the increase in 'dominical' land, which paid fewer taxes to the government. This led to the survival of the peasantry, with rustic land still having the robot. In 1789 it was abolished by Joseph II, however Leopold II restored it when his brother Joseph II died in 1790. The abolition of robot during the Revolutions of 1848 broke the last legal tie which held the peasants to the land, and was seen as a great victory by the peasants.