Historical U-Shaped Arc Lamp Diagram - Early Electric Lighting Technology #132086 (License: Personal Use)

This black-and-white line drawing depicts a historical U-shaped carbon arc lamp, featuring two vertically aligned carbon electrodes housed in adjustable clamps at the ends of a curved glass or ceramic envelope. The lamp rests on a two-tiered insulating base, likely made of ebonite or porcelain, designed to prevent electrical leakage and support the heavy assembly. Such lamps were pivotal in early public and industrial lighting before incandescent bulbs became widespread.

Used in educational, historical, or museum web pages about the evolution of electric lighting; targets users researching 19th-century electrical engineering, antique lighting devices, or science history exhibits.