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Otis King's patent calculator, model K; Photo by Richard Lyon. Otis Carter Formby King (1876–1944) was an electrical engineer [1] in London who invented and produced a cylindrical slide rule with helical scales, primarily for business uses initially. The product was named Otis King's Patent Calculator, and was manufactured and sold by Carbic ...
A slide calculator, also known as an Addiator after the best-known brand, is a mechanical calculator capable of addition and subtraction, once made by Addiator Gesellschaft of Berlin, Germany. Variants of it were manufactured from 1920 until 1982. The devices were made obsolete by the electronic calculator.
The comptometer-type calculator was the first machine to receive an all-electronic calculator engine in 1961 (the ANITA mark VII released by Sumlock comptometer of the UK). In 1890 W. T. Odhner got the rights to manufacture his calculator back from Königsberger & C , which had held them since it was first patented in 1878, but had not really ...
The Fuller calculator, sometimes called Fuller's cylindrical slide rule, is a cylindrical slide rule with a helical main scale taking 50 turns around the cylinder. This creates an instrument of considerable precision – it is equivalent to a traditional slide rule 25.40 metres (1,000 inches) long.
By Emma Farge. GENEVA (Reuters) -A U.S. envoy told Reuters that U.S. President-elect Donald Trump's team should stay active at the United Nations Human Rights Council, partly to counter what she ...
Multiple studies have also found a link between vitamin D levels and hair growth. However, since alopecia areata is an autoimmune disease, this type of hair loss isn’t actually related to ...
According to the New York Times, here's exactly how to play Strands: Find theme words to fill the board. Theme words stay highlighted in blue when found. Drag or tap letters to create words. If ...
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