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  1. Path: sparky!uunet!ogicse!uwm.edu!wupost!decwrl!csus.edu!netcom.com!nagle
  2. From: nagle@netcom.com (John Nagle)
  3. Newsgroups: sci.electronics
  4. Subject: Re: Guided Vehicles
  5. Message-ID: <zz6maxl.nagle@netcom.com>
  6. Date: 14 Aug 92 18:17:07 GMT
  7. Article-I.D.: netcom.zz6maxl.nagle
  8. References: <kwilli.2@elaine.ee.und.ac.za> <josef.713714826@uranium> <1992Aug14.155048.28576@news.columbia.edu>
  9. Organization: Netcom - Online Communication Services  (408 241-9760 guest)
  10. Lines: 9
  11.  
  12. gmw1@cunixa.cc.columbia.edu (Gabe M Wiener) writes:
  13. >Several years ago I was up in some law firm and I saw a motorized mail-cart
  14. >making the rounds, turning at corners, etc.  I looked at the floor and didn't
  15. >see any track, so I asked.  Turned out that they had this aerosol spray on
  16. >the carpet that left a trail (magnetic, I suspect) that the cart followed.
  17.  
  18.         Not magnetic.  Fluoresced in UV.  Are those still being sold?
  19.  
  20.                     John Nagle
  21.