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The Addiator was a mechanical add/subtract calculator, made by Addiator Gesellschaft, Berlin. A sturdy design, variants of it were sold from August, 1920 until 1982. It was composed of sheet-metal sliders inside a metal envelope, manipulated by a stylus, with an innovative carry mechanism, doing subtract ten, carry one with a simple stylus movement. Image File history File links Download high resolution version (600x2110, 215 KB)A picture of an addiator, taken May 22, 2005 by James Yolkowski (User:JYolkowski). ...
A modern basic arithmetic calculator A calculator is a device for performing numerical calculations. ...
This article does not cite its references or sources. ...
1920 (MCMXX) is a leap year starting on Thursday (link will take you to calendar) // Events January January 7 - Forces of Russian White admiral Kolchak surrender in Krasnoyarsk. ...
1982 (MCMLXXXII) is a common year starting on Friday of the Gregorian calendar. ...
Only obsoleted by the electronic variety, it was simple and cheap. It also handled non-decimal measurements, like feet and inches, or pounds, shillings, and pence, with no trouble. Addition and Subtraction required different 'screens', handled by turning the instrument over, or flipping a front panel, or, later, by extended sliders and an extra lower panel. A foot (plural: feet) is a non-SI unit of distance or length, measuring around a third of a metre. ...
The pound sterling is the official currency of the United Kingdom (UK). ...
More expensive versions even had a builtin slide rule on the back. The slide rule, or slipstick, is an analog computer, usually consisting of three interlocking calibrated strips and a sliding window, called the cursor. ...
This type of calculator was introduced by the Frenchman Troncet in 1889. The Addiator was one of the most popular calculators of this sort, and the name is often used to refer to the type generally.
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