Early Incandescent Light Bulb Patent Diagram - Historical Electrical Invention #1886197 (License: Personal Use)

This historical engraving depicts a seminal 1880s incandescent lamp design, featuring a pear-shaped glass bulb housing a carbon filament suspended between platinum leads, mounted on a threaded brass base with screw terminals. Additional diagrams show the filament loop (Fig.1), vacuum seal (Fig.2), full assembly (Fig.3), and socket clamp mechanism (Fig.4). The illustration emphasizes precision engineering critical to early electric lighting commercialization.

Used in educational articles, museum exhibits, or tech history pages about the evolution of electric lighting; targets users researching Edison’s patents, vintage electrical engineering, or STEM heritage content.