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Addometer

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@ National Museum of American History

Reliable Typewriter & Adding Machine Corporation

Description

This eight-wheeled stylus-operated adding machine has metal wheels and frame. The wheels each have ten holes around the edge. The two rightmost are white, the next three are red, and the next three are white. All the wheels are labeled around the outside with digits for use in addition and around the inside with digits for use in subtraction. A steel stylus and a clearing bar fit into the right side. The top edge of the instrument has an 11-inch scale of equal parts, divided to sixteenths of an inch. The machine was made by the Reliable Typewriter & Adding Machine Company of Chicago, Illinois.The instrument was purchased by Smithsonian curator Audrey B. Davis from Greybird Enterprises in Taneytown, Md., in 1990 for $45.00.For a related accession, see 2010.0214. For another Addometer, see 1996.0220.01References:Typewriter Topics, vol. 66, August, 1927, pp. 36-37 (announced as coming in September - $10.00).Typewriter Topics, vol. 72, June, 1929, p. 29 (cost $15.00).Office Appliances, vol. 87, January, 1948, p. 138, 182 (price $12.95).Office Appliances, vol. 98, Oct., 1953, p. 233 (price $14.95). Accession file.Currently not on view
Format:
Metal (Overall Material)
Rights:
Gift of Miles Davis
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Record Contributed By

National Museum of American History

Record Harvested From

Smithsonian Institution

Keywords

  1. Adding Machines
  2. Business
  3. Mathematics
  4. Reliable Typewriter & Adding Machine Corporation
  5. Science

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