Help with orphan source

[William Lorenzen <LORENZEN_W@A1.TCH.Harvard.edu>]

          Looking for identification of the nuclide that is part of a device 
          labeled "IONOTRON - US RADIUM CORP."  The item is a metal strap 
          about six feet long and on one side is what appears to be a metal 
          banding (electroplated??) affixed to the strap which is 
          radioactive.  The strap has uniform radiation levels down it's 
          length of about 30.0 mr/hr at a few centimeters away as measure 
          with an ion chamber.
          
          My first thought was some form of electrostatic device used in a 
          paper mill to eliminating static charges on large rolls of paper 
          (or something like that)
          
          Sorry no pictures.  Any ideas on what isotope?  Did the US Radium 
          Corp. make things out of isotopes other than radium?
          
          Please respond to me directly.
          
          Thanks,
          
          William A. Lorenzen
          lorenzen_w@a1.tch.harvard.edu
          617-355-7516

************************************************************************
The RADSAFE Frequently Asked Questions list, archives and subscription
information can be accessed at http://www.ehs.uiuc.edu/~rad/radsafe.html