Automatic Arithmotor
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Around the edge of each wheel, the digits from 0 to 9 are printed repeatedly. Attached to each cylinder is a toothed revolving disc. The machine has a wooden case with a tin cover over the wheels. On the cover, next to each wheel, is a slip of paper labeled with the numbers from 1 to 9. To enter a number, one places one's finger at the tooth next to the digit on the appropriate paper slip, and rotates forward. The sum appears in slots in the metal cover, near the top of the machine. Each wheel has four cams linked to a weighted pawl-lever, which is responsible for carrying."}, {"label": "Description", "content": "The inventor was Reuben [sic] R. James, an Indiana native born in August, 1826. According to Census records, he was a farmer (1850, 1860) and then the proprietor of a woolen mill (1870) in Rising Sun, Indiana. He took out this patent in 1878. James and fellow Rising Sun resident Mirabeau N. Lynn took out a patent for a grain meter in 1881."}, {"label": "Description", "content": "References:"}, {"label": "Description", "content": "U.S. Patent 209690, November 5, 1878."}, {"label": "Description", "content": "U.S. Patent 238122, February 22, 1881."}, {"label": "Location", "content": "Currently not on view"}], "name": [{"label": "patentee", "content": "James, Reuben R."}, {"label": "maker", "content": "James, Reuben R."}], "topic": [{"label": "subject", "content": "Mathematics"}], "place": [{"label": "place made", "content": "United States: Indiana, Rising Sun"}, {"label": "place patented", "content": "United States: Indiana, Rising Sun"}], "physicalDescription": [{"label": "Physical Description", "content": "wood (overall material)"}, {"label": "Physical Description", "content": "metal (overall material)"}, {"label": "Physical Description", "content": "cork (overall material)"}, {"label": "Physical Description", "content": "paper (overall material)"}, {"label": "Measurements", "content": "overall: 21.5 cm x 20.2 cm x 20.2 cm; 8 15/32 in x 7 15/16 in x 7 15/16 in"}], "dataSource": [{"label": "Data Source", "content": "National Museum of American History"}], "objectType": [{"label": "Object Name", "content": "adding machine"}, {"label": "Object Type", "content": "Patent Model"}]}}, "url": "edanmdm:nmah_690854", "hash": "7b959a005c28cb49fb4ec7f1d976880617d5f6e3", "docSignature": "d038abe3e8e593deda6d12ce7159263c", "timestamp": 1663782564, "lastTimeUpdated": 1655973455, "title": "Automatic Arithmotor"}