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History
Torquetum
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The torquetum or turquet is a medieval astronomical instrument designed by persons unknown to take and convert measurements made in three sets of coordinates: horizon, equatorial, and ecliptic. It is characterised by R. P. Lorch as a combination of Ptolemy's astrolabon and the plane astrolabe. In a sense, the torquetum is an analog computer.
Torquetum (1568), made by Johannes Praetorius in Nuremberg
Torquetum (1568), made by Johannes Praetorius in Nuremberg
Engraving of a Torquetum
Engraving of a Torquetum
Detail from The Ambassadors, a 1533 painting by Hans Holbein the Younger
Detail from The Ambassadors, a 1533 painting by Hans Holbein the Younger
Analog computer
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A page from the Bombardier's Information File (BIF) that describes the components and controls of the Norden bombsight. It was a highly sophisticated
A page from the Bombardier's Information File (BIF) that describes the components and controls of the Norden bombsight. It was a highly sophisticated optical/mechanical analog computer used by the United States Army Air Force during World War II, the Korean War, and the Vietnam War to aid the pilot of a bomber aircraft in dropping bombs accurately.
TR-10 desktop analog computer of the late 1960s and early 1970s
TR-10 desktop analog computer of the late 1960s and early 1970s
The Antikythera mechanism, dating between 150 and 100 BC, was an early analog computer.
The Antikythera mechanism, dating between 150 and 100 BC, was an early analog computer.
Analog computing machine at the Lewis Flight Propulsion Laboratory c. 1949.
Analog computing machine at the Lewis Flight Propulsion Laboratory c. 1949.