3 events with tag "mechanical"
1623
ID: 4459
Wilhelm Schickard designs 'Calculating Clock' - first mechanical calculator with gears for addition and subtraction
ID: 4459
1642
ID: 4460
Blaise Pascal invents Pascaline - mechanical calculator using gears and wheels, builds 50 units for sale
ID: 4460
1938
ID: 4476
Curt Herzstark designs Curta calculator - miniature mechanical calculator, perfected in concentration camp, produced 1948-1972
ID: 4476