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Beam Compasses
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Description: For larger circles beam compasses are used. The two parts called channels which carry the pen and the needle point are clamped to a wooden beam at a distance equal to the radius of the circle. The thumb nut underneath one of the channel pieces makes accurate adjustment possible.
Source: Kenison, Ervin Mechanical Drawing (Chicago: American School of Correspondence, 1916) 1:17
Keywords: Beamcompasses, beam-compass, large circles
Copyright: 2009, Florida Center for Instructional Technology. See license.
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