www.antik.it/Antique-measuring-instruments/4632-Fowler-s-Textile-Calculator/
1435241484Code 4632 Fowler s Textile CalculatorFowler's Textile Calculator slide rule dated back to the early 1900, chrome-plated brass. Used to convert weights Lb / kg and measures linear inch / cm, this instrument is used to write and calculate the same amount in two different ways. Very good condition, working perfectly. Diameter 6.7 cm.
William Henry Fowler was born in July 1853 in Oldham and when he was 14 he began engineering training at the Oldham firm of Platt Brothers; when he was 20 he won a Whitworth Scholarship so he studied for four years at Owens College in Manchester. In 1888 he become General Manager of the Chadderton Iron Work but in 1891 he changed his career becoming editor of The practical Engineer, a week journal of Manchester and setting up few years later the Scientific Publishing Company; he published also Fowler's Mechanical Engineer's Pocket Book, an annual pocket for several trades. In 1898, Fowler’s The Mechanical Engineer carried an article on a circular calculator, sold via the Scientific Publishing Company. He was joined by his son Harold in 1905 and W. H. Fowler took out three patents in the next four years. The Twelve-Ten was introduced in 1936 and it was designed for architects, builders, surveyors and timber merchants who often had calculations to make with decimal and duodecimal notation. The calculator has two dials and two rotating knobs. The left hand knob rotates the dial and the right hand one rotates the cursor. There are 7 scales for converting twelfths to/from tenths, meters to yards, Kg to lbs, inch to cm. Long Scale or Pocket calculator was the mainstay of production for the next 30 years.
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Antique measuring instruments
Code 4632 Fowler s Textile Calculator
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