Machines That Moved Before the Word Existed
The word “robot” only dates from the 1920s, but people had been building self-moving figures for centuries. These machines are called automata (the singular is automaton). They were not programmable in the modern sense and could not sense their surroundings. What they did was carry out a built-in sequence of motions, often with surprising grace. Because they imitated living beings, they are a natural ancestor of robots, even if most historians stop short of calling any of them the first robot.
Legends and Early Descriptions
Stories about artificial servants appear in ancient literature, including Greek myths about bronze or golden helpers made by a smith god and a Chinese tale of an artificer who presented a lifelike mechanical figure to a king. These are legends, not evidence of working machines, and it is best to treat them as early imagination about what craftsmen might one day achieve.
Better documented are the writings of Hero of Alexandria, a mathematician and engineer usually placed in the first century CE. His surviving works describe devices powered by steam, water, weights and air, including self-operating theater displays in which small figures appeared to move on their own. Some details of these descriptions are debated, and we cannot be sure how many of the machines were actually built. The same era produced instruments such as the Antikythera mechanism, a geared device for astronomical calculation. It was not an automaton, but it shows that sophisticated gearing existed in the ancient Mediterranean.
The Medieval Workshop
In 1206 the engineer Ismail al-Jazari completed a book describing many mechanical devices, including fountains, a famous elephant-shaped water clock, and an automatic band of musicians placed on a boat. Reconstructions based on his drawings suggest that some of his ideas, such as pegs on a rotating drum that triggered musical parts, were a form of stored instructions. Whether every machine was built exactly as drawn is uncertain, but the book is among the best sources on medieval mechanical design. Related traditions of the time worked with a water clock as the power source, using the steady flow of water to time moving figures.
European towns also built astronomical clocks with moving figures that appeared at the hour. Leonardo da Vinci’s notebooks from around 1495 include a design for an armored mechanical knight that could sit, stand and move its arms. A modern reconstruction was built from his sketches, but there is no solid evidence that he built one himself.
The Age of Showpieces
The 1700s were the high point of the clockwork figure. In 1739 the French inventor Jacques de Vaucanson displayed a mechanical flute player and a duck that appeared to eat, digest and excrete. The flute player is generally thought to have really produced notes using air and moving fingers. The duck was more of an illusion: accounts indicate that the output was not made from the food that was swallowed, a point that was understood later.
The Swiss watchmaker Pierre Jaquet-Droz and his associates built three famed figures in the 1770s: a writer who dipped a quill and wrote a short text, a draughtsman who drew pictures, and a musician who played an organ. These still exist and can be seen in operation on occasion. The writer is especially interesting because its text could be changed by rearranging parts, giving a limited kind of programmability.
One famous machine of the period was a fraud. The Mechanical Turk, shown by Wolfgang von Kempelen from 1770, seemed to play chess, but a hidden person operated it. It is useful to the history because it shows how eager audiences were to believe a machine could think.
How Stored Motion Worked
A clockwork figure typically relied on a spring or weight for power and a set of cams on a rotating shaft for instruction. Each cam had a shaped edge that pushed a lever; the shape of the edge decided the motion, and the length of the barrel decided how long the routine lasted. Changing the performance meant cutting new cams or pegs. This is why the Jacquard loom, which used punched cards to select weaving patterns in the early 1800s, was a significant step: the instructions became easy to swap without rebuilding the machine.
Why Automata Matter to Robot History
Automata did not do useful work, and they could not respond to the world, so they are separate from the industrial robots that appeared in the twentieth century. Still, they left three lasting contributions. They trained generations of craftsmen in precision mechanics. They established the idea that lifelike behavior could be built from parts. And they put robot-like machines in the public imagination, so that when authors and engineers later asked what an artificial worker might be, a long tradition was waiting. In Japan a related tradition of mechanical dolls, called karakuri, developed during the Edo period and is often cited as an influence on later Japanese robot design, although the strength of that link is debated.