creator Holsen, Thomas M. creator Noll, Kenneth E. A dry deposition sampling apparatus having at least one thin dry deposition plate with sample collection film is maintained on a support structure which is rotatable about a vertical axis and has a vane to maintain the sharp leading edge of the dry deposition plate(s) headed into the wind. Covers are positioned over the sample collection films automatically upon commencement of precipitation and are automatically moved to a position exposing the sample collection films to the atmosphere upon cessation of precipitation. The duration of exposure of the collection films to the atmosphere is timed, thus providing a dry deposition sampling apparatus which may be left unattended for long periods of time. Submitted by Aric Ahrens (ahrens@iit.edu) on 2011-12-12T19:14:34Z No. of bitstreams: 1 5443271.pdf: 254464 bytes, checksum: 9664fc21cc6839c90bec12d9d393560e (MD5) Made available in DSpace on 2011-12-12T19:14:34Z (GMT). No. of bitstreams: 1 5443271.pdf: 254464 bytes, checksum: 9664fc21cc6839c90bec12d9d393560e (MD5) Previous issue date: 1995-08-22 Illinois Institute of Technology 2009-05-11 1995-08-22 5,443,271 http://hdl.handle.net/10560/2412 en United States Patent Patent reformatted digital application/pdf No Copyright - United States http://rightsstatements.org/page/NoC-US/1.0/ Open Access