Chester telegraph relay, circa 1860

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Strengthening an electrical message

Chester telegraph relay, circa 1860

Charles T. Chester made this relay around 1860. A weak incoming signal controlled a separate local circuit, allowing telegraph messages to travel beyond the useful range of a single unaided line.

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At a glance

Collection: Technology
Section: Communications
Model: 149,996 triangles · 0.6 MB

Model coverage and boundaries

1 web meshes; 149,996 triangles; 3 embedded image textures. Source chunks/materials are not assumed to be physical components. No exploded view is offered.

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Evidence & model coverage

1 web meshes; 149,996 triangles; 3 embedded image textures. Source chunks/materials are not assumed to be physical components. No exploded view is offered.

Changes: Geometry and materials reserialized; Draco re-encoding may discard degenerate faces. Embedded textures reduced to at most 512 pixels per dimension. Original files retained privately.

Credit: National Museum of American History; Charles T. Chester relay EM.335588. Smithsonian 3D Digitization. Exact model and embedded texture package: CC0 1.0, verified on the item’s 3D-media usage control. Credit retained as provenance; no share-alike requirement.

Original model and provenance ↗ · CC0 1.0 ↗ · Subject information ↗

Meshes are normalized for viewing. Display size is not a measurement tool. This is an educational exterior/surface visualization; unmodeled interiors and hidden systems are not inferred.

File audit

Retrieved 16 October 2026. Original SHA-256: 55f29f0d3b0ce949a914fbff04ee74f98cffde79fa67c2a93bcde9a8518d9d92. Original and audit evidence retained privately. Full rights entry.