Smartbolts have little discs in their heads that change color as the right amount of tension is applied to them. I recently installed a child safety gate with a similar mechanism: a red, spongy washer between the bolt and the frame; once the right amount of tension was on the bolt, the washer was squished down so much it disappeared and you could stop tightening.
Unfortunately, a torque-wrench does not measure bolt tension accurately, usually only about +/- 30%, because it does not take friction into account. The friction depends on bolt, nut, washer-material, plating, surface smoothness, machining accuracy, degree of lubrication and the number of times a bolt has been tightened. Fastener manufacturers often provide information for determining torque requirements for tightening various bolts, accounting for friction and other effects. However, in field applications, this information is often not available, practical or administered poorly.
(via Red Ferret
Chester (or Shasta?), a Red Labrador, has figured out a way to deal with the Roomba that’s more efficient than barking at it or biting it: turning it off. [Thanks, Heather!]
An EU court ruled against a seller of customized set-top boxes this week, with the judge saying that his preinstallation of certain Kodi Add-Ons makes the boxes illegal to offer. Mr Wullems sells, over the internet, various models of a multimedia player under the name ‘filmspeler’. That device acts as a medium between a source […]
AquaGenie is “the world’s smartest water bottle,” a $70 internet-of-things device that “knows your water goals” and will connect to the Internet to inform you if you have met them. AquaGenie is your daily companion that keeps you on track and fully hydrated, helping you achieve all your health, wellness, fitness and weight loss goals! […]
Bamboo has lots of uses beyond just being panda food. Things like bikes, roads, scaffolding, and musical instruments are made from the fast-growing grass. But unless you are participating in a tropical-themed LARP, you probably wouldn’t want a shirt made from bamboo stalks. So why do bamboo bed sheets make any sense? Because yarn extracted from […]
If you want to work in tech, but don’t have any desire to code web apps to help businesses sell things to other business, you might want to consider a career in cybersecurity. Judging from the apparent complete infiltration of Russian hackers in American cyberspace, it seems fair to speculate that there’s a major shortage of […]
All moms are different. But all moms like getting flowers on Mother’s Day, and that’s a fact (not, however a fact we can document in any fashion.) Instead of getting chewed out for forgetting to call her on the second Sunday of May, you can take care of it ahead of time with Teleflora’s flower […]