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

A chart lay folded on a table in the centre of the cabin, with a pair of dividers and a parallel ruler lying on it.

From A Tall Ship On Other Naval Occasions by Bartimeus

It is evident that, unless the workmanship is unusually good, this form of parallel ruler is not as accurate as the common one illustrated above.

From The Teaching of Geometry by Smith, David Eugene

I measured off a distance of four miles with the dividers, and marked it off above the mouth of the creek; then applied the parallel ruler and found the course.

From The Congo Rovers A Story of the Slave Squadron by Schonberg, J.