Explore Mechanical Calculator, Mechanical Gears, and more!

Old typewriter. Yost "No ribbon, Direct printing, permanent alignment."  This line from a 1890 display ad clearly states the two principles most important to incorporate into the design of this typing machine -- direct printing and accurate alignment.

Old typewriter. Yost "No ribbon, Direct printing, permanent alignment." This line from a 1890 display ad clearly states the two principles most important to incorporate into the design of this typing machine -- direct printing and accurate alignment.

mechanical calculator

Photographs That Reveal the Intricate Innards of Old Mechanical Calculators

American photographer Kevin Twomey, based in San Francisco, reveals the fascinating innards and intricate workings of the old mechanical calculators with his

1930s Remington Noiseless 8 | Fab.com

1930s Remington Noiseless 8

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