[GreenKeys] Hughes Printing Telegraph

[John Nagle]

On 7/18/2011 8:46 PM, greenkeys-request at mailman.qth.net wrote:
> From:greenkeys-bounces at mailman.qth.net
> [mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of W2HX
> Sent: Monday, July 18, 2011 10:49 PM
> To:greenkeys at mailman.qth.net
>
> Here are more pictures.  I have a basic understanding of how the machine
> works having played with it for several hours today.  Also, I found the
> following document that describes EXACTLY this machine.  Even the photo
> (fig. 1) is my machine exactly. There was some discussion back when the
> machine first surfaced whether or not this was a Hughes, Siemens or Groos&
> Graf (Gross&  Graf).  I am convinced this is a Hughes based on this PDF.  I
> will add that I believe Groos and Graf were contract manufacturers probably
> building this for Hughes. Siemens did create an improvement over the weight
> driven Hughes system using a motor (46 VDC) and the regulator (governor)
> tower and some other improvements which is why their name is shown on the
> regulator tower. (From The Worldwide History of Telecommunications By Anton
> A. Huurdeman)
>
> Although I didn't post any pictures, it is clear that my unit was once
> weight driven but had been converted at some time.  On the cast iron base,
> there is a pivot for the pedal (to pull up the weight again). Also there are
> large holes in the ebonized base to allow for the rope? Cable? to feed
> through.

    That is a beautiful machine, and I'm glad someone in the Teletype
community has it.

    Some machines could be either weight driven or electrically driven,
having both the chain sprocket and the motor.   It looks like yours has
the machinery for both motor and weight drive, but not the weights,
pedal, or ladder chain.  Compare a motor drive only machine
(http://www.telegraphlore.com/fons_images/Page_2/HUGHES.jpg)
which lacks all those big sprockets and heavy reduction gearing.

    If the insulation has held up in the motor and electromagnet, it
should be possible to get the machine running.

    What's the width of the paper tape?

					John Nagle