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Telegraph Relay - Non-Polarized, late 19th Century Reg. No: ST 008465
- Relay used at telegraph receiving stations, particularly those operating on long connecting lines. Often signals received over long lines were too weak to operate the receiving instruments directly so the relay served as a very sensitive switch to connect a local battery to the receiving instruments.
- Wooden base. Two horizontal coils with ebonite covers at on end of base.Brass terminals and components.
|Dimensions:||95 mm (Height), 150 mm (Width), 240 mm (Length)|
|Tagged with:||electrical relays, telegraphy|
|Themes this item is part of:||Copy of text for label for Non-Polarised Telegraph Relay - American Pattern, 1916, Telegraphy Collection, Information & Communication Collection|
This item is part of the following themes: