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

[Ed Sharpe Archivist for SMECC via GreenKeys]

just  to clarify... single current  working is like  comes  out of the back 
of HAL st-5000  tu?
 
 
In a message dated 1/27/2015 4:10:33 P.M. US Mountain Standard Time,  
s.hallas at ntlworld.com writes:

Ed  Sharpe Archivist for SMECC via GreenKeys wrote:
> Henry - notice too it  is in the  early  color process  too...
> this is great  !!   Thanks  for sharing it  with us .
> I had not  seen the workings  of  one  with a print wheel like that   
before.
> In a message dated 1/26/2015 8:21:02 A.M. US Mountain Standard  Time,
> henry.eck at statisticalfinance.com writes:
>   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

What a clever model of a  Creed Model 7!. It shows the complicated way 
the bellcranks select the  letters, but it's a pity it doesn't mention 
the start/ stop  synchronisation.

It also implies single current working, but as far as  I know the British 
Post Office always used double current polar  working.

I hope BT Heritage will be uploading more of their historic  films. They 
covered the telephone and postal service as well. I look  forward to 
seeing more of them.
Their YouTube channel is  at
<https://www.youtube.com/user/btletstalk/videos>

Cheers,
Sam


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