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beam compass
noun
Drafting.
- a compass having adjustable legs, set perpendicular to the paper and sliding along a horizontal bar so as to permit the drawing of large circles.
beam compass
noun
- an instrument for drawing large circles or arcs, consisting of a horizontal beam along which two vertical legs slide Also calledtrammel
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˜yÐÄvlog History and Origins
Origin of beam compass1
First recorded in 1775–85
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Example Sentences
Examples have not been reviewed.
These lines are struck with great rapidity, and with mathematical truth, by an instrument called a "beam compass," in the use of which this workwoman is most expert.
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The "Odd Job" Tool.—A most useful special tool, which combines in its make-up a level, plumb try-square, miter-square, bevel, scratch awl, depth gage, marking gage, miter gage, beam compass, and a one-foot rule.
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