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Copy of text for label for Non-Polarised Telegraph Relay - American Pattern, 1916
Image: Telegraph Relay
Source: Museum Victoria
Non-Polarised Telegraph Relay
This instrument is used in the same manner as the Siemens Non-polarised Relay - See No. 8466. Electrically it is the same but differs in the mechanical arrangement of the parts.
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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 instrume ...Images: 1