Recent Blogs
Slotted Parallel Ruler Mechanism Explained: How It Works, Parts, Diagram, and Navigation Uses
Slotted parallel ruler explained — how the slot-and-pin geometry keeps drawn lines parallel, with worked examples for draughting, marine navigation and shipwrights.
Three Part Parallel Ruler Mechanism: How It Works, Parts, Geometry & Uses Explained with Diagram
How the Three Part Parallel Ruler transfers angles across a drawing board without slip. Components, formula, worked example for drafting and navigation work.