[GreenKeys] Here Is mechanism

[Henning Treumann]

Yes.

See attached picture. It shows the early version of a Lorenz Lo15
which is basically same as the original Teletype model 15.
This version was produced from circa 1930 to 1950.

Henning DF3OE

Am Do., 28. Mai 2020 um 19:58 Uhr schrieb John, W9DDD <w9ddd at tapr.org>:
>
> 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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>
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