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1924 Western Electric \"Inter-Phone\" Paperback Book Installing/Maintaining...cs For Sale
![1924 Western Electric \](img-large/g/RYEAAOSwOldmnEX6/s-l1600/1924-Western-Electric-Inter-Phone-Paperback-Book-I.jpg "1924 Western Electric \")
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1924 Western Electric \"Inter-Phone\" Paperback Book Installing/Maintaining...cs:
$29.00
This is a \"WESTERN ELECTRIC\" book on \"Installing & Maintaining\" Inter Phones (or Intercoms as we\'d call them today).
There are wiring diagrams for 15 different typesof \"Inter-phone\" systems.
In these early days all of the power for these systems came from Dry Cell Batteries.
There were 2 different type systems, Metallic andCommon Return.
Some stations used up to 8 pairs of wires, others 12.
It took a lot of wire for these circuits.At least the Intercoms in later days took much less
1924 Western Electric "Inter-Phone" Paperback Book Installing/Maintaining...cs $29.00
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