This Day in Geek History: February 5
1850
The first U.S. patent for a push-key operated adding machine is issued to Dubois D. Parmelee of New Paltz, New York. (US No. 7,074) His “Calculating Machine” diagram shows nine keys. Each key causes a ratchet to raise a graduated indicator rod at the rear of the device by a corresponding number of notches. The calculator will ultimately be unsuccessful. The first commercially successful calculator will be invented forty years later by William Burroughs.
1861
A patent is issued to Coleman Sellers of Philadelphia for the Kinematoscope, which he describes as an “improvement in exhibiting stereoscopic pictures of moving objects.” (US No. 31,357) The Kinematoscope projects a series of still pictures with successive stages of action mounted on paddle blades through slits passed under the lens of a stereoscope.
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At the age of only fifteen,
The unmanned Soviet spacecraft 