Recent Blogs
Spring Cyclograph Mechanism Explained: Parts, Decaying Spiral Formula, Diagram and Worked Example
How a Spring Cyclograph draws decaying spirals and damped curves for draughtsmen, engineers, and ornament designers — geometry, formula, and a worked example.
Section Liner Mechanism: How the Pawl-and-Rack Indexing Works, Parts, Uses, and Hatching Formula
Section Liner explained — how draughtsmen use this drawing tool to hatch parallel section lines fast and consistently in mechanical and architectural drafting work.
Roller Parallel Ruler Mechanism Explained: How It Works, Parts, Diagram and Marine Navigation Uses
How a Roller Parallel Ruler works, the geometry behind its tracking accuracy, and why marine navigators still use it on paper charts today.