Mechanics or machinists also used protractors to draw designs for new types of machinery. For instance, there were several forms of limb protractors for draftsmen that both functioned as T-squares and ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. This yellow xylonite (celluloid-like ...

The Y Ruler, developed by Yuan Design Studio, is multi-functional measuring set, inspired by the ancient Brass Goniometer. It has been redesigned to offer enhanced durability and precision, embodying ...