Baldwin Calculating Engine
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Baldwin of St. Louis, Mo., in 1875. The machine has a brass base, two open brass pieces on each side that form a frame, and a brass, steel, and wooden mechanism. A cylindrical drum mounted horizontally on the frame is 11.5 cm. (4-1/2\u00e2\u0080\u009d) in diameter and 5 cm. (2\u00e2\u0080\u009d) in height."}, {"label": "Description", "content": "Both ends of this drum are perforated with six round holes. The drum slides along the shaft into a series of position and may be fixed in place by a small lever. Along the surface of the drum are three slots in which levers slide. The levers may be set at any digit from 0 to 9. Moving a lever from 0 to a given number moves a steel arc that pushes the corresponding number of pins above the surface of the cylinder opposite the lever. Rotating the large cylinder rotates a series of intermediate wheels in proportion to the number of raised pins."}, {"label": "Description", "content": "These wheels are linked to a set of seven cogwheels, each having ten teeth. On the outer edge of each tooth is a number in type, the numbers ranging from 0 to 9. These cogwheels are linked to a second set of three larger cogwheels that also have digits in type. These wheels may be intended to indicate the multiplier. The front of the two sets of type-wheels has a brass cover that contains a manually operated printing mechanism. The machine has no paper or ribbon"}, {"label": "Description", "content": "The machine is marked on the large cylinder next to the slots for the three levers: F.P. Baldwin (/) St. Louis, Mo."}, {"label": "Description", "content": "Baldwin applied for his patent September 8, 1873. A few examples were manufactured and sold by the Reliance Machine Works of Philadelphia."}, {"label": "Description", "content": "Compare to a production model of the machine, MA.310229."}, {"label": "Description", "content": "References:"}, {"label": "Description", "content": "U.S. Patent 159244, February 2, 1875."}, {"label": "Description", "content": "\u00e2\u0080\u009cBaldwin\u00e2\u0080\u0099s Arithmometer,\u00e2\u0080\u009d Philadelphia, Reliance Machine Works, about 1875."}, {"label": "Description", "content": "P. A. Kidwell, \u00e2\u0080\u009cThe Adding Machine Fraternity at St. Louis: Creating a Center of Invention, 1880\u00e2\u0080\u00931920,\u00e2\u0080\u009d <I>IEEE Annals of the History of Computing</I>, 22 #2 (April\u00e2\u0080\u0093June 2000), pp. 4\u00e2\u0080\u009321."}, {"label": "Location", "content": "Currently not on view"}], "name": [{"label": "patentee", "content": "Baldwin, Frank S."}, {"label": "maker", "content": "Baldwin, Frank S."}], "topic": [{"label": "subject", "content": "Mathematics"}], "place": [{"label": "place made", "content": "United States: Missouri, St. Louis"}, {"label": "place patented", "content": "United States: Missouri, St. Louis"}], "physicalDescription": [{"label": "Physical Description", "content": "steel (overall material)"}, {"label": "Physical Description", "content": "brass (overall material)"}, {"label": "Physical Description", "content": "wood (overall material)"}, {"label": "Measurements", "content": "overall: 13.5 cm x 13.5 cm x 23 cm; 5 5/16 in x 5 5/16 in x 9 1/16 in"}], "dataSource": [{"label": "Data Source", "content": "National Museum of American History"}], "objectType": [{"label": "Object Name", "content": "calculating machine"}, {"label": "Object Type", "content": "Patent Model"}]}}, "url": "edanmdm:nmah_694172", "hash": "92d822cf98580ce3e4deff71a06c3ca29af9884a", "docSignature": "5084210be4f7080b0cb55d183f9de8d1", "timestamp": 1663782564, "lastTimeUpdated": 1655973454, "title": "Baldwin Calculating Engine"}