ruling pen

In the 17th century there was developed a stylus that could draw a line with a specific width called a ruling pen.

Its technology virtually replaced the ruling pen and greatly simplified technical drawing.

A ruling pen contains ink in a slot between two flexible metal jaws, which are tapered to a point.

A ruling pen is a drawing instrument for drawing with ink or with other drawing fluids.

Ruling pens allow precise adjustment of line width, and still find a few specialized uses, but technical pens such as the Rapidograph are more commonly used.

Early technical pens (ruling pens) consisted of a small pair of calipers, having one flat and one bowed leg holding ink between them.

He handled ruling pens and compasses with a polished deftness, apparently to the envy of the other draftsmen, who kept stealing occasional glances from their boards.

I use a finer brush for the highlight on the ripples in the water and for the foreground plants, and a ruling pen for the tall grasses.

It was an ordinary Hammond auto map--but it had been squared off with a ruling pen with the squares carefully marked in much the same manner as war-time ordinance-survey maps.

Ink lines were drawn with a ruling pen, a relatively sophisticated device similar to a dip-in pen but with adjustable line width, capable of producing a very fine controlled line width.