Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!sdd.hp.com!cs.utexas.edu!uunet!bywater!scifi!hybrid!torag!spocom!luns From: luns@spocom.UUCP (Luns Tee) Newsgroups: sci.electronics Subject: Re: Anti-shoplifting devices Message-ID: Date: 16 May 91 15:19:15 GMT References: <1991May10.003238.24277@comp.vuw.ac.nz> Organization: The Spocom Group, Toronto, Ontario, Canada. Lines: 17 cyborg@kauri.vuw.ac.nz (Alex Ivopol) writes: > This whole arrangement looks very much like a capacitor in parallel with a co > Don't ask me how it works tho... I realize that this would most probably > resonate in an electromagnetic field of the right frequency, but how does one > disable it once you bought the product and go out the shop through the gates > The sticker is diposable and stays on the merchandise once you bought it. The > salespersons do not do anything funny with the products (like placing them > briefly under the counter) before handing them back to you... > > The local library uses the same sort of stickers on their cassettes. I haven't found anything in the books and magazines though. They get around things by passing books around the detector. As for disabling them, some stores have bins in which the cashiers fill your bags with sold goods. I'd suspect these bins to also be degaussers.