He prepared a prototype in 1875, and a model in 1876. In the early 1870s, Odhner sought to improve the family fortunes by inventing a calculating machine. Petersburg, Russia, in the factory of another Swede, Ludwig Nobel. Odhner (1845–1905), a Swedish engineer working in St. Odhner Arithmometer Description This is one of the first calculating machines built on the design of Willgodt T. ID Number MA.310231 accession number 113246 catalog number 310231 Data Source National Museum of American History Location Currently not on view date made 1877 maker Nobel, L. Odhner,” Greifswalder Symposium zur Entwicklung der Rechentechnik, ed. Timo Leipaelae, “The Life and Works of W. Williams, Cambridge: MIT Press, 1992, esp. Martin, The Calculating Machines (Die Rechenmaschinen), trans. It also has a "9" on the inside of the carriage. Specifically, it is found on the top edge of the bottom of the case and the bottom edge of the top of the case, on a gear inside the crank, and on the right side of each of the pinwheels. The number “9” has been stamped several places that are visible when the case is opened. A third, underlined, mark there reads: St. A second, underlined, mark there reads: L. A mark at the top of the machine reads: W. A crank with an ivory knob on the right side of the machine is rotated counterclockwise for addition and multiplication and clockwise for subtraction and division. A crank at the right end of the carriage may be designed to release it. Rotating a wing nut on the right of the carriage zeros the result register, and turning a crank on the left of the revolution counter zeros it. Seven brass screws rotate to set numbers in the revolution register. The carriage is at the front of the machine, with a seven-digit revolution counter at the very front and a ten-digit result register behind this. Commas are painted on the case to indicate decimal divisions. Windows between the pinwheels show the number set. Numbers are set by rotating the pinwheels forward using levers that extend from the wheels. This lever-set non-printing machine has a black cast–iron frame with eight brass pinwheels and a wooden base. Pinwheel calculating machines came to sell widely. Rotating the disc had an effect proportional to the number of protruding pins. Louis, Odhner represented digits by retractable pins that extended from the edge of metal discs. He prepared a prototype in 1875, a model in 1876 and in 1877 arranged to have 14 machines built at the Nobel factory. In the early 1870s, Odhner sought to improve his fortune by inventing a calculating machine. ID Number MA.252698 catalog number 252698 accession number 49064 Data Source National Museum of American History Location Currently not on view date made 1875 date patented 1875 02 02 patentee Baldwin, Frank S. Louis: Creating a Center of Invention, 1880–1920,” IEEE Annals of the History of Computing, 22 #2 (April–June 2000), pp. Kidwell, “The Adding Machine Fraternity at St. “Baldwin’s Arithmometer,” Philadelphia, Reliance Machine Works, about 1875. Compare to a production model of the machine, MA.310229. A few examples were manufactured and sold by the Reliance Machine Works of Philadelphia. Baldwin applied for his patent September 8, 1873. The machine has no paper or ribbon The machine is marked on the large cylinder next to the slots for the three levers: F.P. The front of the two sets of type-wheels has a brass cover that contains a manually operated printing mechanism. These wheels may be intended to indicate the multiplier. These cogwheels are linked to a second set of three larger cogwheels that also have digits in type. On the outer edge of each tooth is a number in type, the numbers ranging from 0 to 9. These wheels are linked to a set of seven cogwheels, each having ten teeth. ![]() Rotating the large cylinder rotates a series of intermediate wheels in proportion to the number of raised pins. 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. The levers may be set at any digit from 0 to 9. ![]() Along the surface of the drum are three slots in which levers slide. The drum slides along the shaft into a series of position and may be fixed in place by a small lever. Both ends of this drum are perforated with six round holes. A cylindrical drum mounted horizontally on the frame is 11.5 cm. The machine has a brass base, two open brass pieces on each side that form a frame, and a brass, steel, and wooden mechanism. Patent Office model for a printing pinwheel calculating machine patented by Frank S. Baldwin Calculating Engine Description This is the U.S.
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