The odd apparatus at left is the Australian “co-graph”, which automatically maps the ground over which it moves. Named for its inventor, Lt. Col. H. J. F. Coe, the machine can be operated by a pedestrian or set up in a trailer (PSM, Dec. '44, p. 134). The co-graph obtains direction by being oriented with a sensitive compass; gets distance from a calibrated ground wheel. Drive from the wheel turns a paper-carrying roller under a fixed pencil, and thus a course is plotted to scale. The co-graph’s upper part - sighting tube, compass, mirror, and map-making equipment- weighs only 10 pounds and is strapped to the user’s body.
Source :
blog.modernmechanix.com/2006/09/13/australian-device-make...
Uploaded by Marc Wathieu on 5 Nov 08, 2.38PM CST.
Thursday, November 06, 2008
Australian Device Makes Maps Of the Ground It Covers
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