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US Patent 4,214,035: Antistatic coated polyester film by John M. Heberger, American Hoechst Corporation. Issued July 22, 1980. An antistatic device is any device that reduces, dampens, or otherwise inhibits electrostatic discharge, or ESD, which is the buildup or discharge of static electricity. [1] [2] ESD can damage electrical components such as computer hard drives, and even ignite flammable liquids and gases.
An ionizing bar, sometimes referred to as a static bar, is a type of industrial equipment used for removing static electricity from a production line to dissipate static cling and other such phenomena that would disrupt the line. It is important in the manufacturing and printing industries, although it can be used in other applications as well. [6] [7] Photo: Anti-static plastic = fantastic! Here's one way that chemical additives can make plastics anti-static. In this case, the additive is made of polar molecules (ones with uneven electric charge, so they have positive and negative ends). 1) These molecules (shown here in red) migrate to the surface of the plastic with their negative ends pointing out. 2) Water in the atmosphere (H 2O, shown in blue) also has polar molecules, whose positive ends are attracted to the negative ends of the additive. 3) The moisture forms a thin, electrically conducting film that acts as an anti-static coating.
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If you have floor coverings made from synthetic fibers, you probably get a static charge every time you walk over them. That's not If you're interested in the nitty-gritty detail of how chemical anti-static products work, these patents might be worth a look: Various symbols can be found on products, indicating that the product is electrostatically sensitive, as with sensitive electrical components, or that it offers antistatic protection, as with antistatic bags. Photo: An anti-static car strip. Look closely and you'll see a zig-zag of copper wire running across the surface. This is what supposedly carries the static electricity to the ground. In practice, although rubber is an insulator, car tires do conduct electricity to a certain extent, making devices like this entirely redundant. You can see an alternative (and somewhat clearer) photo on Wikimedia Commons.
Laumeister, Bill (March 2, 2011). "Tutorial 4991: Oops...Practical ESD Protection vs. Foolhardy Placebos". Application Notes. Maxim Integrated . Retrieved January 21, 2013.Charging About: The Story of Electricity by Jacqui Bailey and Matthew Lilly. Bloomsbury, 2004. A picture-book-style history, broadly suitable for ages 5–10.
US Patent and Trademark Office from US Patent 3,383,559: Antistatic footwear by Karl Oesterheld, May 14, 1968. Another common symbol takes the form of a bold circle being intersected by three arrows. Originating from a U.S. military standard, it has been adopted industry-wide. It is intended as a depiction of a device or component being breached by static charges, indicated by the arrows. [5] Examples [ edit ] Cell-phone fires: a lot of static by Elisa Batista. Wired, March 25, 2003. Can cellphones start fires at gas stations? Not according to this article.In addition to wrist straps, ankle and heel straps are used in industry to bleed away accumulated charge from a body. These devices are usually not tethered to earth ground, but instead incorporate high resistance in their construction, and work by dissipating electrical charge to special floor tiles. Such straps are used when workers need to be mobile in a work area and a grounding cable would get in the way. They are used particularly in an operating theatre, where oxygen or explosive anesthetic gases are used. [ citation needed] Versions of the symbol will often have the hand being crossed out as a warning for the component being protected, indicating that it is ESD sensitive and is not to be touched unless antistatic precautions are taken. Our ground wire is also helpful in reducing the noise produced by wireless phones and improving the quality of radio, sound, and TV monitors. It's a versatile solution that can improve the overall driving experience for everyone in the car. Dissipative Vinyl Three-Layer Mats and Rolls 8200 Series" (PDF). digikey.com . Retrieved 2 July 2023. Antistatic garments or antistatic clothing can be used to prevent damage to electrical components or to prevent fires and explosions when working with flammable liquids and gases. [ citation needed]
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