A refrigerator magnet or refrigerator magnet is an ornament, often oddly attached to a small magnet, used to post items such as shopping lists, child art or reminders on cabinet doors ice, or which only serves as decoration. Fridge magnets come in different shapes and sizes, and may have promotional messages placed on them. Refrigerator magnets are popular souvenir items and collectibles.
Video Refrigerator magnet
Producing
The first refrigerator magnet is a cylindrical or solid rectangular magnet. Then, a flexible magnet developed, consisting of a high coercivity ferromagnetic compound (usually iron oxide) is mixed with a plastic binder. It is extruded as a sheet and passes the conveyor belt over a strong permanent cylinder magnet line. This magnet is arranged in a stack with a magnetic pole back and forth facing upward (N, S, N, S,...) on a free spinning axle. It impresses plastic sheets with magnetic poles in alternate line format. No electromagnetism is used to produce magnets. The distance pole-pole is on the order of 5 mm, but varies with the manufacturer. Ferrite magnets are also commonly used, with decorative elements attached to magnets with adhesive. They were created in the 1920s.
Maps Refrigerator magnet
Magnetic polarization
Unlike most conventional magnets that have different north and south poles, the flat refrigerator magnet is magnetized during manufacture by alternating north and south poles on the side of the refrigerator. This can be felt by taking two similar (or identical) refrigerator magnets and shifting each other with the "magnetic" side of each other: the magnets will alternately reject and pull as they are moved a few millimeters. One can note that the magnetic field outside of the same magnetic sheet is actually zero, ignoring the edge effect (see, for example, D. Budker and A. Sushkov, Physics in Your Legs ", OUP, 2015 ), so that a uniform magnetic magnet is not attached to the refrigerator. Most magnets have special, slightly more sophisticated magnetization patterns called Halbach arrays. These constructs provide an enhanced magnetic field on one side and almost zero magnetic fields on the other.
Collecting
Collecting magnets is a hobby, with some collectors specializing in magnets from their travels, or from a particular theme. They are sold in souvenir shops around the world. There is no commonly known term (eg currency collection for currency collection) for magnetic retrieval. A Russian collector has proposed the term memomagnetics , derived from the words memoriale i> (Latin) and magnetic (Greek) A magnetic collector will be called memomagnetist . These terms have been used by at least one Russian online community for magnetic collectors.
According to Lot Collectors magazine, in March 1999, Tony Lloyd of Cardiff, Wales, coined the term "thuramgist" for "refrigerator magnet collectors".
Large collection
At one time, Louise J. Greenfarb's largest fridge magnet collection from Henderson, Nevada (suburb of Las Vegas, USA). His world record was entered into Guinness World Records with 19,300 items in 1997. According to the UK's "alternative notebook", it grew to 29,000 in February 2002, and then to more than 30,000 items. More than 7,000 magnets from the Greenfarb collection are on display at the Guinness Museum in Las Vegas, which has since closed. According to his son, Bryan Greenfarb, until November 2015 Louise still collects and has about 45,000 non-duplicate refrigerator magnets, but the Guinness verification process, which could take more than 6 months, is too much to continue validating the exact numbers.
In January 1999, Tony Lloyd, a teacher in Cardiff, Wales, was interviewed by Collector's Lot Channel 4 Television program when it was confirmed that he had the largest collection of fridge magnets in Europe at the time, more than that. 2000. In January 2016, he has a collection of over 4500. He was again interviewed by the BBC and ITV during 2017. In February 2018, while on holiday in Sri Lanka, the 104th state, Tony's collection surpassed 5,000 magnets.
Home crafts
Refrigerator magnets are also popular as craft projects.
References
Source of the article : Wikipedia
0 Comments