Calculating MachinesOther Calculating Machines
Several mechanisms other than stepped drums or pinwheels were used in calculating machines, both in early prototypes and in successful products.
"Calculating Machines - Other Calculating Machines" showing 1 items.
- In the early 1890s, as the Columbian Exposition in Chicago drew near, George B. Grant once again turned his attention to improvements in calculating machines. According to the donor, this model represents his first attempt to improve on his 1876 machine.
- The non-printing, barrel-type machine has a wooden base, metal plates for a frame on each side, and four cross shafts that are linked by gears. When the handle on the right side is turned, two of the shafts rotate. The upper of these shafts has eight geared, rotating rings on a common collar. This collar may be moved to several positions along the shaft.
- The lower shaft has ten geared wheels. There is space for numbers to be written on the rim of both the upper and the lower wheels. Each of the upper wheels has one tooth in its gear that protrudes further than the others. The back shaft has ten components on it that may be designed to link the upper wheels to those below.
- This machine was given to the museum by George B. Grant’s half-brother, Edwin A. Bayley.
- Accession file.
- Currently not on view
- date made
- Grant, George B.
- ID Number
- catalog number
- accession number
- Data Source
- National Museum of American History, Kenneth E. Behring Center