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Telegraph Relay - Non-Polarized, late 19th Century Object Reg. No: ST 008465

Summary:
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.
Description:
Wooden base. Two horizontal coils with ebonite covers at on end of base.Brass terminals and components.
Discipline: Technology
Dimensions: 95 mm (Height), 150 mm (Width), 240 mm (Length)

More information

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
Primary Classification: COMMUNICATIONS
Secondary Classification: Telegraphy
Tertiary Classification: input/output

Comments

David Spence Posted on 07 Oct 2012 3:07 AM
Though unnamed, based on the style of binding posts, pattern of knurling, style of windlass, and other characteristics, that this relay was manufactured bt the Western Electric Company in the US about 1860. It id probably lightly marked (indented)with a "D" and a date on the underside. I have an identical unit.
David Spence Posted on 07 Oct 2012 3:08 AM
Sorry, 1860 should read 1880

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