Electromagnet Diagrams - Historical Illustrations of Coil and Core Configurations #93690 (License: Personal Use)

The left diagram depicts a classic U-shaped electromagnet with dual solenoid coils wound around vertical limbs, connected by a curved iron yoke, and a movable armature suspended above. The right diagram illustrates a simpler straight-core configuration with two parallel coils on cylindrical cores, joined at the top by a horizontal iron bar (keeper) to complete the magnetic circuit. Both are rendered in precise 19th-century technical illustration style, emphasizing winding patterns and structural symmetry.

Used in educational resources, physics textbooks, or museum exhibits explaining early electromagnetic theory and device evolution; targets students, historians, and engineers seeking foundational knowledge of electromagnetism.