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Re: pic: Graduation Present
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Re: pic: Graduation Present
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Re: pic: Graduation Present
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Re: pic: Graduation Present
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Re: pic: Graduation Present
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Rather, the results of dropping your appliance in a body of water is usually something that a company's marketing, legal, or compliance department worries about, and simply applies to the labeling materials that accompany the product - something the Engineer might never even see. |
Re: pic: Graduation Present
I guess more of an engineering concern would be when you turn the machine on, the blade will stay safely where it is supposed to be and not hurt the customer.
However, you can try to make something as safe as you possibly can, unfortunately no matter what someone will find someway to hurt themselves. For example, you can make a car as safe as possible. It may get the highest safety ratings in it's class, but if you drive it off of a cliff there really isn't much you can do about that. |
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The engineer designing the appliance ought to know all of this, and take it into consideration. The blender's designers probably decided against a bare metal case, for example—because an internal fault could enliven the housing. (Or if it is bare metal, I bet they thought about the degradation of insulation inside of the unit, and chose something that would be durable.) That's not to say every device is designed with the same care: an immersion blender has different insulation and sealing requirements than a tabletop blender. Although nobody needed to lose sleep over a blender, there was likely at least some consideration of the life-threatening failure modes, simply as part of the due diligence necessary to avoid a finding of negligence. You definitely wouldn't want to have to testify that you were relying on the NEC to protect users of your blender. |
Re: pic: Graduation Present
Not to kill this otherwise illuminating argument, but most appliances use UL (Underwriter's Lab) certified components and there are standards and test for such components. (Often the Green Shirt Folks at competition have something to do with UL).
This is true of most consumer products in that there are safety standards to be followed in order to be in compliance or to rate your product relative to safety (like crash test ratings for cars). Many large companies are able to self certify and have internal labs that can perform such a test. Often not for profit organizations get together and make the standards in order to not count on the wreckless calculations of an ill-prepped engineer. For instance, most lifting apparatus have some pretty major factors of safety associated with them. A lifting harness may require a 2.3 to 4x factor of safety (depending on standard) for each atttachment point relative to the entire load. These sort of safety factors are often necessary and built from previous bad experiences. for instance, a 4 chain harness without good load distribution could actually lift most (or all) the load with 2 chains. If you used a 1.5x factor of safety relative to all 4 chains for the entire load, It might work, or it might drop a really heavy object. For further reading on chains: http://www.liftingrigging.com/Inform...ain-safety.htm That being said, you can do your best to build a better product and idiot proof it, but society has a way of building a better idiot. Very cool graduation present. |
Re: pic: Graduation Present
That's a pretty sweet Graduation Gift package. It's amazing, one seems to pull in a decent amount of cash and some useful knick-knacks, but these type of gifts seem to be the most memorable and the most useful. I.E. props to my coach, who gave me a Leatherman Squirt PS4 for graduation:
![]() I've already been using it a bunch at my current engineering internship and it was a very thoughtful and useful tool. Hope you enjoy and use yours in just as many creative and practical ways :D |
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1. Fixing a ripped boat cover 2. Fixing a tube on a pool cleaner 3. LARP foam weapon - i'm such a nerd :D - lots of duct tape |
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We have a larp-sword which belongs to our CAD sub-team and has been passed down through student generations. It has been restored through the years and we even added a sheath for a nice duct tape transport to be flung over the back: http://www.chiefdelphi.com/forums/sh...ad.php?t=77626 What did you make, pics? ... |
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