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How did Unimate become the first programmable industrial robot?

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A diagram displays six types of simple machines with labeled illustrations: inclined plane, wedge, screw, lever, wheel and axle, and pulley, each shown with real-world examples like ramps, axes, screws, seesaws, door handles, and pulleys lifting objects. — machine Six simple machines for transforming energy into work.

The Unimate became the first programmable industrial robot by successfully merging two key technologies: numerical control, which provided the concept of a programmable machine, and teleoperator technology, which contributed the design of a mechanical arm capable of performing useful work.1

Invented by American engineer George Devol in 1954, the Unimate was an electronically controlled hydraulic arm designed to repeat arbitrary sequences of motions. Its development was advanced by Joseph Engelberger, who co-founded the company Unimation, Inc., to promote industrial robotics.21

The machine's practical utility was proven in 1959 when a prototype was introduced at a General Motors Corporation factory in New Jersey. In 1961, the first production-line unit was installed to perform the hazardous task of removing and stacking hot metal parts from a die-casting machine. By securing a U.S. patent in 1961, the Unimate established the foundation for modern industrial robotics.21