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Jaap's Mechanical Calculators Page

The company was renamed the Calculator Corp. after two years. The manufacturing was done by a local metal stamping foundry. Russell Wallace Hook was the manager of the company throughout this time, but it is not known who the owner was. 1921-1942: The Lightning Calculator, The Lightning Calculator Co., Grand Rapids, USA.…

Lightning Adding Machine National Museum of American History

This small seven-wheeled stylus-operated non-printing adding machine has a metal case painted green and covered with felt on the back. It sits in a brown bakelite stand. A stylus fits in the ten holes in each wheel. Placing the stylus in the proper hole and and rotating it enters a digit. The sum appears in seven windows above the holes. The two rightmost and the two leftmost wheels are brass ...…

The Lightning Calculator – Bonham, Hook and Pangborm

Martin [5] discusses the Calculator Company, the Pang-born, and the Lightning Calculator, but does not mention the Bohnham & Schram machine. What Martin has to say about the Calculator Com-pany, the Pangborn Adding Machine Company, and the Lightning Calculator Company is technically correct— that their machines were manufactured in the same ...…

Adders and Small Calculating Devices - Office

Adders and Small Calculating Devices 20th Century Eastern European Office with Two Abacuses During the late 19th and early 20th centuries, a large number of relatively inexpensive machines were marketed to businesses and others for use in performing simple addition and subtraction. In principle, these adders and other devices could also be used for multiplication by repetitive addition and for ...…