OBJET-18
OBJET-18B
SCHICKARD'S MACHINE- Germany - 1623
A model built on the basis of sketches and explanations contained in two letters that Schickard wrote Kepler in 1623 and 1624 .
Called the "Calculating Clock" by its inventor, it would have been comprised of one level of six napierian cylinders for multiplication and arithmetic adder of six wheels, each with a single tooth mechanism for the numbers to be carried over.(Collection IBM Europe)
Called the "Calculating Clock" by its inventor, it would have been comprised of one level of six napierian cylinders for multiplication and arithmetic adder of six wheels, each with a single tooth mechanism for the numbers to be carried over.(Collection IBM Europe)