Rolling_ruler

Rolling ruler

Rolling ruler

Add article description

A rolling ruler 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.[1][2]

A rolling parallel ruler
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. [3]

References

  1. [1]
    Jack E. Ingels (2003). "Using Drawing Instruments". Landscaping: Principles and Practices. Cengage Learning. p. 11. ISBN 9781401834104.
  2. [2]
    Jim Tolpin (2007). "drawing techniques". Measure Twice, Cut Once. Popular Woodworking Books. p. 24. ISBN 9781558708099.
  3. [3]
    U.S. patent 5,050,309
Stub icon

This tool article is a stub. You can help Wikipedia by expanding it.
Share this article:

This article uses material from the Wikipedia article Rolling_ruler, and is written by contributors. Text is available under a CC BY-SA 4.0 International License; additional terms may apply. Images, videos and audio are available under their respective licenses.