[GreenKeys] How The Teleprinter Works- 1940 (11:05 mins)

[Henry Eck]

This is an instructional film from BT which illustrates some mechanisms in a
teleprinter (but not the clutch/selector).

https://www.youtube.com/watch?v=HcMHam54EOI

Published on Dec 29, 2014
Produced by the GPO Film Unit. Models are used to demonstrate the working of
a teleprinter. Shown is how the pressing of a key on the keyboard generates
a five unit teleprinter code, is then transmitted as a serial code to the
teleprinter line and finally is decoded to select the correct character on
the type wheel of the printing mechanism of the receiving teleprinter.