On this day in 1900, the engineer Frank Baldwin was awarded a U.S. Patent for his mechanical calculator. This machine was capable of doing a calculation such as
54679285×3298=18033228193054679285×3298=18033228193054679285×3298=180332281930
in about 20 seconds with eight turns of the handle.
Click on Ⓟ for a poster.
Born:
1802: Niels Abel Ⓟ
Niels Henrik Abel
1855: Alfredo Capelli Ⓟ
1878: Louis Karpinski Ⓟ
1889: Hans Hamburger Ⓟ
1936: Ki Hang Kim Ⓟ
Died:
1853: Théodore Olivier Ⓟ
1872: Charles Eugène Delaunay Ⓟ
1910: Julius Petersen Ⓟ
1981: Jerzy Neyman Ⓟ
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