Parallel rulers are a drafting instrument used by navigators to draw parallel lines on charts. The tool consists of two straight edges joined by two arms...

drawing of parallel lines over the paper. The adjustable angle between the rulers allows the lines to be drawn in varying accurate angles. Rulers may also...

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...

_for_navigation_of_visually_impaired_persons. How to use the dividers How to use the parallel rulers Navigational Instruments at The Mariners' Museum...

the claim that two Golomb rulers with the same distance set must be congruent. This turned out to be false for six-point rulers, but true otherwise. There...

3,000 km. On any other parallel the scale factor is sec φ so that Parallel distance = ruler distance × cos φ / RF     (parallel). For the above model 1 cm...

production of quadrants. He made and repaired brass reflecting quadrants, parallel rulers, scales, parts for telescopes, and barometers, among other things....

LXXIX. The circle A slides between the two parallel rulers D E. The circle 13 slides between two parallel rulers FG, at right angles to the former. In this...

when the Ottoman Janissaries utilized it during the Battle of Mohács. Parallel rulers: Invented by Taqi ad-Din Muhammad ibn Ma'ruf and used at the Constantinople...

time/speed/distance nomogram. With the aid of a marking device, dividers, and parallel rulers, the maneuvering board provides a template for graphical solution of...