Morse Transmission Set [Single Needle Telegraph]; Siemens Brothers and Company L...


Museum of Transport and Technology (MOTAT)


Morse Transmission Set [Single Needle Telegraph]

About this object

Single needle telegraph Morse transmission set.
1. Relay on the left is made by Siemens, London.
2. Single needle indicator (centre rear) made by A.T.M. (Associated Telegraph Manufacturers), England.
3. Change-over switch (centre) duplex/single.
4. Variable resistance tank on the right.
5. Standard Morse key in the front.


Siemens Brothers and Company Limited (Germany, estab. 1847)

Maker Role



Associated Telegraph Manufacturers

Maker Role


Place Made




Credit Line

The Museum of Transport and Technology (MOTAT)

Object Type

Device, Morse Code Instruction/Telecommunication Accessories/Telecommunication T&E/06 Tools & Equipment for Communication/Nomenclature

Object number


Copyright Licence  

All rights reserved

Ron McMullen 23 Jan 2017 04:50 AM,UTC

The rear item is a differential galvanometer. Totally different to a single needle system.
The switch is duplex/simplex. ... Ron

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