WebThis slide rule was invented by Edwin Thacher, and manufactured and sold by Keuffel & Esser Co. Excerpt from the instruction manual (of another Thacher rule in the collection): "By the use of this instrument the drudgery of calculation is avoided, and the relief to the mind may be compared with the most improved mechanical appliances in overcoming the wear … Web21 Feb 2024 · The slide rule (often nicknamed a "slipstick") is a mechanical analog computer, consisting of at least two finely divided scales (rules), most often a fixed outer pair and a movable inner one, with a sliding …
Keuffel & Esser 1741 Thacher Cylindrical Slide Rule National Mus…
WebThe scales on this 22-inch, two-sided wooden slide rule are printed on paper. The front has two scales on the left end of the base labeled B and C and two scales labeled A on the left end of the slide. These scales run half the length of the instrument. The B and two A scales are identical, divided logarithmically from left to right and running from 1 to 10. The C … WebThe Thacher cylindrical slide rule was sized for a desk, but its scales were equivalent to those on a conventional slide rule over 59 feet long. It had scales for multiplication, division, and squares and square roots. There were no trigonometric scales. Keuffel & Esser sold model 4012 from 1900 to about 1950. marracash canzoni testi
Thacher
WebThe previous slide rule measured 59 feet, as compared to the Thacher slide rule at 22 inches long. Keuffel & Esser manufactured this calculating instrument Solve homework. … WebKeuffel & Esser 4013 Thacher Cylindrical Slide Rule DetailsRelated Object Details Description This desktop slide rule is in a mahogany case. It has a cylindrical brass drum covered with paper printed with forty A scales. A wooden handle is … WebThe Thacher Cylindrical Slide rule preceded the modern slide rule. In 1881, a patent was granted to Edwin Thacher (1839-1920) to create a slide rule that could fit on a desk. The … data aggregates