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Telegraph Relay - Non-Polarized, late 19th Century Reg. No: ST 008466
- Relay of Siemens pattern 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.
- Brass baseplate on wooden base carries two horizontal coils. Brass components and screws. Four brass terminals, two on each side of wooden base.
Fitted with wooden-framed glass cover.
|Dimensions:||144 mm (Height), 172 mm (Width), 230 mm (Length)|
|Dimension Comment:||Dimensions with glass cover.|
|Tagged with:||electrical relays, telegraphy|
|Themes this item is part of:||Copy of text for label for Non-Polarised Telegraph Relay - Siemens' Form, 1916, Telegraphy Collection, Information & Communication Collection|