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From: jones@pyrite.cs.uiowa.edu (Douglas W. Jones,201H
 MLH,3193350740,3193382879)
Newsgroups: alt.ascii-art,rec.arts.ascii
Subject: Line: Unloading Iron Ore
Date: 23 Jun 1994 12:56:56 -0500
Organization: University of Iowa, Iowa City, IA, USA
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Someone in rec.railroad wondered about how Iron Ore is unloaded from
bulk carriers on the Great Lakes.  The answer is that today, all bulk
carriers are self-unloading, but that historically, the there was a
machine known as the Hulett or Grasshopper that did the job.  I posted
the following to illustrate what these looked like:

                                                          ________
                     ______________               _      |        |
                    |Counter       -------_______|_|     | NOT TO |
                    |_Weight___o__________________o|     | SCALE! |
                             |   |               | |     |________|
                             |   |               | |
                           __| o==================o|
   Track on top of gantry |         |            | |
 ==========================================      | |__
 | |\    /\    /\    /\    /\    / \ \__/_/      | |_|  Control Cab
 | | \  /  \ gantry /  \  /  \  /| |\  /  hopper |  \|
 | |  \/____\______/____\/____\/_|_|_\/   to hold| _/
 | |  /                          | | /    bucket | |
 | | /                           | |/     load  / ^ \ Clamshell Bucket
 | |/              |Rail|        | /            \/ \/
 | /               | Car|        | |
 | |               |____|        | |     |__n             n__|
 |_|                H  H         |_|     |  |             |  |
--^-               -^--^---^--^---^-.    |  |             |  |
    \  ore pit    / track  track    |wwww|  | bulk carrier|  |wwwwww
     \           /                  |    |  |     hold    |  |
      \_________/                   |    |  |_____________|  |
                                    |     \                 /   A typical
                                    |      \_______________/    great lake
                                    \__
                                       \/\___--____
                                                   \___---___-------__

				Doug Jones
				jones@cs.uiowa.edu