[GreenKeys] Here Is mechanism

[John, W9DDD]

So there was a hole in the cover for the "HIER IST" button?

John, W9DDD

On 5/28/2020 12:49 PM, Henning Treumann via GreenKeys wrote:
> Lorenz built the licensed version of a Teletype model 15 called Lo15
> starting from the
> early days of teleprinting. Lorenz was its own company and the biggest
> competitor
> in communications equipment to Siemens here in Germany.
> Here in Germany answerbacks were common (and necessary) with the start of the
> public Telex network (inventend by Siemens) in 1932. The network was
> automatic from its
> first day and designed for unattended 24/7 use of the machines. Hence
> from those days almost
> all teleprinters were commonly equipped with answerback mechanisms.
> 
> Since both machines (TT model 15 and Lorenz Lo15) are basically the
> same machines
> and Lorenz already had experience with answerback units, maybe
> Teletype decided to easily
> purchase them from its business and license partner in Germany.
> 
> Attached of a picture of an early Lorenz Lo15 keyboard unit with
> answerback drum installed.
> 
> Henning DF3OE
> i-Telex:  925302 TREU D
> 
> www.i-telex.net
> www.telexforum.de
> 
> 
> 
> Am Do., 28. Mai 2020 um 19:25 Uhr schrieb WAYNE <teletypeparts at comcast.net>:
>>
>> I do recall that model 19 Telex sets had an answerback function.  They were called Lorenz AB units I believe.  Perhaps made by Siemans?
>>
>> I searched Lorenz and found out it was another version of machine encryption used by Germany in WWII.  No mention of later use as the AB mechanism.
>>
>> BTW, CTRL WRU pertains to ASCII machines.  The keys to depress to trigger distant ends AB drum.
>>
>> Figs D were the keys to type to trigger distant ends AB drum on Baudot machines.
>>
>> 73,
>>
>> Wayne
>> KB1FDW
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