BEAMCOMPASS
Beam compass
A beam compass is a compass with a beam and sliding sockets or cursors for drawing and dividing circles larger than those made by a regular pair of compasses. The instrument can be as a whole, or made on the spot with individual sockets and any suitable beam.The above text is a snippet from Wikipedia: Beam compass
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beam compass
Noun
- a device for creating circular curves, which has a central pivot pin, and an outer curb scribing point, connected by a horizontal beam
The above text is a snippet from Wiktionary: beam compass
and as such is available under the Creative Commons Attribution/Share-Alike License.