Thacher slide rule
WebThacher's rule, though it fit on a desk, was equivalent to a conventional slide rule over 59 feet long. It had scales for multiplication and division and another scale, with divisions twice as large, for use in finding squares and square roots. But it had no trigonometric scales. http://waywiser.rc.fas.harvard.edu/objects/2867/thachers-calculating-instrument
Thacher slide rule
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WebThe cylindrical slide rule by Edwin Thacher, a Pennsylvania railroad bridge designer, also illustrates the 19th-century shift in production from Europe to the United States, as … 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 …
WebLondon in the mid 1960's. The Fuller Slide Rule preceded the Thacher Slide Rule by 10 years [8] and out-lasted it by as much as 25 years giving, it a record for slide rule longevity. The construction of Fuller Slide Rules is generally typical of late 19th and early 20th Century English slide rules. Many types were fabricated by gluing WebCylindrical, rotating slide rule Designed by Edwin Thacher in the late 1870's, and marketed by K+E as the model 4012 and 4013. An engraving mistake on early pre-K+E instruments mis-spells the name as Thatcher. ... An amazing combination slide rule, reference book and periodic table by Concise. This has an 8 scale circular rule on the face ...
WebThacher, a graduate of Rennselaer Polytechnic Institute, spent much of his career designing railway bridges. To assist in his calculations, he designed a cylindrical slide rule. … WebThe cylindrical slide rule by Edwin Thacher, a Pennsylvania railroad bridge designer, also illustrates the 19th-century shift in production from Europe to the United States, as …
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 slide rule (also known colloquially in the United States as a slipstick) is a ... However, the Thacher rule was quite expensive, as well as being non-portable, so it was used in far more limited numbers than conventional … bucket trucks for sale houston txWebThe Thacher’s Calculating Instrument is a cylindrical slide rule which was patented by Edwin Thacher, C.E. on the first of November, 1881. The given instrument consists of a … bucket trucks for sale in british columbiaWebThe 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. … bucket trucks for sale in californiaWebThe rules can be returned to 1970 condition with some metal polish on the end brackets and a wipe-down with Windex. x x x x Historically Important Thacher’s Calculating Instrument This is the oldest Thacher Calculating Instrument known to have been sold by Keuffel & Esser, New York. Its estimated date is 1887. bucket trucks for sale in covington tnWebThis 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 … bucket trucks for sale in ctWebEdwin Thacher invented a slide rule with scales equivalent to 66 feet in length instead of the 10 inches of common slide rules. Marketed by Keuffel & Esser, Thacher's Calculator … bucket trucks for sale in columbus ohioWebEdwin Thacher invented a slide rule with scales equivalent to 66 feet in length instead of the 10 inches of common slide rules. Marketed by Keuffel & Esser, Thacher's Calculator … bucket trucks for sale in michigan