Historical Arc Lamp Diagram - Early Electric Lighting Technology #124161 (License: Personal Use)

This black-and-white line drawing depicts a U-shaped carbon arc lamp, a precursor to modern electric lighting, featuring two vertically aligned carbon rods housed within a protective glass or ceramic envelope (implied by the outline). The electrodes are secured in insulated terminal blocks attached to a stepped ceramic or ebonite base, designed to prevent short circuits and manage heat dissipation. Such lamps were commonly used in lighthouses, streetlights, and projectors before incandescent and fluorescent technologies became widespread.

Used on educational or historical technology pages explaining early electric lighting systems; targets users researching vintage electrical engineering, museum exhibits, or restoration projects involving antique illumination devices.