rolling ruler
A rolling ruler (also known as a parallel glider) is a ruler that contains a cylinder much like a rolling pin inside, thereby enabling it to "roll" along a sheet of paper or other surface where it is being used. A rolling ruler can draw straight, parallel lines, and also has other instruments included, enabling it to do the jobs of a protractor and compass. • Illustration — A rolling parallel ruler • Illustration — Antique rolling rulers The modern rolling ruler, with protractor, pivot pin and multiple pin holes serving as fixed length compasses has been patented in the US in 1991 by Wei Wang.
rolling ruler
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wikidata · Q7361245 · wikipedia · Rolling ruler
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Rolling ruler is a ruler.
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- “Rolling ruler”, English Wikipedia, consulted as further reading
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- Wikidata, structured authority record Q7361245: rolling ruler
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Part of the biographical narrative on this page reuses licensed material. Its origin, revision and licence are recorded here.
The biographical narrative on this page is based on the Wikipedia article Rolling ruler, revision 1315274047 (EN edition), by its contributors. VALÉORINE has edited that text and built its own documentary record around it. The reused material is available under CC BY-SA 4.0, and this page's reuse of it is offered under the same licence. Everything else on this page — the chronology, the holdings, the evidence, the plates and the connections — is VALÉORINE's own record. Sources and licences.
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These works are cited by the source article, in its own numbering. They are recorded as its citations, not as sources VALÉORINE has verified.
- 1.Jack E. Ingels. Landscaping: Principles and Practices. Cengage Learning. 11. 2003. 9781401834104.
- 2.Jim Tolpin. Measure Twice, Cut Once. Popular Woodworking Books. 24. 2007. 9781558708099.
- 3.US patent 5050309
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The Encyclopedia exists whether or not anything is for sale. Corrections are recorded rather than overwritten, and every version of this record is kept. Published 14 August 2026.
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