{"id":4275,"date":"2024-11-01T10:51:42","date_gmt":"2024-11-01T15:51:42","guid":{"rendered":"https:\/\/patents.harnessip.com\/?p=4275"},"modified":"2024-11-01T10:51:42","modified_gmt":"2024-11-01T15:51:42","slug":"november-1-2024","status":"publish","type":"post","link":"https:\/\/patents.harnessip.com\/?p=4275","title":{"rendered":"November 1, 2024"},"content":{"rendered":"\n<p>On November 1, 1881, Edwin Thatcher a computing engineer for the Keystone Bridge Company in Pittsburgh, Pennsylvania, received U.S. Patent No. 249,117 on an improved slide rule. Thacher was a graduate of Rennselaer Polytechnic Institute and spent much of his career designing railway bridges, inventing his slide rule to assist with his calculations. <\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/patents.harnessip.com\/wp-content\/uploads\/2024\/11\/image.png\"><img loading=\"lazy\" decoding=\"async\" width=\"538\" height=\"774\" src=\"https:\/\/patents.harnessip.com\/wp-content\/uploads\/2024\/11\/image.png\" alt=\"\" class=\"wp-image-4276\" srcset=\"https:\/\/patents.harnessip.com\/wp-content\/uploads\/2024\/11\/image.png 538w, https:\/\/patents.harnessip.com\/wp-content\/uploads\/2024\/11\/image-209x300.png 209w\" sizes=\"auto, (max-width: 538px) 100vw, 538px\" \/><\/a><\/figure>\n\n\n\n<p>The slide rule was invented sometime between 1620 and 1630, shortly after John Napier&#8217;s publication of the concept of the logarithm.  In 1620 Edmund Gunter of Oxford developed a calculating device with a single logarithmic scale.  Two years later in 1622 William Oughtred of Cambridge combined two handheld Gunter rules to make a device that is recognizably the modern slide rule. <\/p>\n\n\n\n<p>Edwin Thatcher&#8217;s slide rule is notable for its cylindrical form, although his was not the first slide rule of a cylindrical form factor. Thacher&#8217;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.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>On November 1, 1881, Edwin Thatcher a computing engineer for the Keystone Bridge Company in Pittsburgh, Pennsylvania, received U.S. Patent No. 249,117 on an improved slide rule. Thacher was a graduate of Rennselaer Polytechnic Institute and spent much of his &hellip; <a href=\"https:\/\/patents.harnessip.com\/?p=4275\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[],"class_list":["post-4275","post","type-post","status-publish","format-standard","hentry","category-patent-of-the-day"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/patents.harnessip.com\/index.php?rest_route=\/wp\/v2\/posts\/4275","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/patents.harnessip.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/patents.harnessip.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/patents.harnessip.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/patents.harnessip.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4275"}],"version-history":[{"count":1,"href":"https:\/\/patents.harnessip.com\/index.php?rest_route=\/wp\/v2\/posts\/4275\/revisions"}],"predecessor-version":[{"id":4277,"href":"https:\/\/patents.harnessip.com\/index.php?rest_route=\/wp\/v2\/posts\/4275\/revisions\/4277"}],"wp:attachment":[{"href":"https:\/\/patents.harnessip.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4275"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/patents.harnessip.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4275"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/patents.harnessip.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4275"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}