parallel ruler

British  

noun

1. engineering a drawing instrument in which two parallel edges are connected so that they remain parallel, although the distance between them can be varied

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Example Sentences

The exercises were growing more complex and difficult: navigation by leg dividers and a parallel ruler; docking in 30 mph wind; sailing around an entire island; trying to rescue Mick’s hat, which blew overboard.

From Washington Post • Sep. 6, 2017

I accordingly went below, secured the chart, together with a pencil, a pair of dividers, and a parallel ruler, and took the whole on deck.

From The Castaways by Dugdale, Thomas Cantrell

By trying with a parallel ruler, I found that the thin grey layers and the black hair-like lines were absolutely straight and parallel to each other.

From Volcanic Islands by Darwin, Charles

In his model the double parallel ruler is replaced by two endless strings and pulleys, and the bar, B C, by a T square.

From Scientific American Supplement, No. 794, March 21, 1891 by Various

But reach down your chart, and produce your parallel ruler and dividers, my hearty; I want to get some sort of notion of what is ahead of us.”

From A Middy of the King A Romance of the Old British Navy by Hodgson, Edward S.