{"id":288,"date":"2010-11-18T13:45:08","date_gmt":"2010-11-18T18:45:08","guid":{"rendered":"http:\/\/scripts.mit.edu\/~zong\/wpress\/?p=288"},"modified":"2010-11-18T14:07:19","modified_gmt":"2010-11-18T19:07:19","slug":"escalator","status":"publish","type":"post","link":"https:\/\/blog.yhuang.org\/?p=288","title":{"rendered":"escalator"},"content":{"rendered":"<p>How do escalators work? I&#8217;ve wondered for years how escalators recycled their step blocks internally. At one point I thought they slid past each other on all four faces to save on turning radius (because I thought the blocks locked along grooves). Today I see an escalator under repair. Now the answer is clear. It&#8217;s much simpler than that: the blocks just turn along a track in the most obvious way imaginable.<\/p>\n<p><img decoding=\"async\" src=\"wp-content\/uploads\/images\/escalator.jpg\" width=\"600\" \/><\/p>\n<p><!--more--><br \/>\nAlso, world&#8217;s shortest escalator:<\/p>\n<p><object width=\"480\" height=\"385\"><param name=\"movie\" value=\"http:\/\/www.youtube.com\/v\/FSLwCImWv-c?fs=1&amp;hl=en_US\"><\/param><param name=\"allowFullScreen\" value=\"true\"><\/param><param name=\"allowscriptaccess\" value=\"always\"><\/param><embed src=\"http:\/\/www.youtube.com\/v\/FSLwCImWv-c?fs=1&amp;hl=en_US\" type=\"application\/x-shockwave-flash\" allowscriptaccess=\"always\" allowfullscreen=\"true\" width=\"480\" height=\"385\"><\/embed><\/object><\/p>\n","protected":false},"excerpt":{"rendered":"<p>How do escalators work? I&#8217;ve wondered for years how escalators recycled their step blocks internally. At one point I thought they slid past each other on all four faces to save on turning radius (because I thought the blocks locked along grooves). Today I see an escalator under repair. Now the answer is clear. It&#8217;s [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[11,180,178,66,1826,177,138,181,179],"class_list":["post-288","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-answer","tag-escalators","tag-four-faces","tag-point","tag-repair","tag-step-blocks","tag-today","tag-track","tag-turning-radius"],"_links":{"self":[{"href":"https:\/\/blog.yhuang.org\/index.php?rest_route=\/wp\/v2\/posts\/288","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.yhuang.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.yhuang.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.yhuang.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.yhuang.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=288"}],"version-history":[{"count":0,"href":"https:\/\/blog.yhuang.org\/index.php?rest_route=\/wp\/v2\/posts\/288\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.yhuang.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=288"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.yhuang.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=288"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.yhuang.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=288"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}