[GreenKeys] Hughes Printing Telegraph

[W2HX]

Oops. I've been so excited with this new toy that my math has gone out the
window!

 

Today I slowly powered up the motor. Field coil and stator(?) coils all have
continuity. The document from Sam Hallas indicated a 46V Battery. We started
at 12V and worked out way up.  At 46V the motor barely had any pull. Total
current was about 125mA.  So we (a friend and I) moved up slowly in 12V
chunks up to about 76VDC where it started to run.  We surmised that this may
have had a 110VDC motor installed. Who knows what in Germany (and the age of
the unit) might have been different than the one described in the PDF.  

 

So we made a video (see link below). It seemed at first that no matter what
polarity we used, the motor only wanted to run backward. We realized that
the field coil is connected in series and therefore the polarity would not
matter.  We also realized that there was a repair made at one time on the
motor (probably in a museum or private collection) and the field coil was
connected reversed. We fixed that and now the unit runs like a top! But it
is running way too slowly still. I will need to make a power supply for
this. I will take a variac and connect up a rectifier to give me a large
range to work with. I will, of course, need to be careful.  

 

http://www.w2hx.com/x/Hughes%20Printing%20Telegraph/Running-07-19-2011.wmv

http://www.w2hx.com/x/Hughes%20Printing%20Telegraph/Running-07-19-2011.wmv

 

hopefully these links will work.

 

One point of interest. At first we ran this, all of the clockwork was
running too (from the electric motor). We then discovered one of the gears
had a set screw and a slot. By loosening the set screw, the gear could be
slid out of the way of the previous gear. This allowed the clockwork to
disconnect from the motor, thereby reducing the overall drag.

 

I believe this system was retrofitted for the electric motor but could use
either at any time.  First, there is still a brake on the flywheel, only
necessary when using the weights (otherwise, no way to stop it!). and this
gear that can slide in our out to allow the clock work to engage or not.

 

Fun stuff! So far we have the unit generating a pulse when a key is pressed.
But beyond that, we're still learning!

 

Eugene, W2HX

 

 

-----Original Message-----
From: Lee Mushel [mailto:herbert3 at centurytel.net] 
Sent: Tuesday, July 19, 2011 1:04 PM
To: Eugene Hertz; 'Henning Treumann'
Cc: GreenKeys at mailman.qth.net
Subject: Re: [GreenKeys] Hughes Printing Telegraph

 

Aren't there 25.4 mm in an inch?

 

73

Lee K9WRU

----- Original Message ----- 

From: "W2HX" <w2hx at w2hx.com>

To: "'Henning Treumann'" <df3oe.henning at googlemail.com>

Cc: <GreenKeys at mailman.qth.net>

Sent: Tuesday, July 19, 2011 8:41 AM

Subject: Re: [GreenKeys] Hughes Printing Telegraph

 

 

>I would love any photos you have. As for the paper tape, it is exactly 1/4"

> wide which I believe is exactly 10mm

> 

> 73 Eugene W2HX

> 

> From: Henning Treumann [mailto:df3oe.henning at googlemail.com]

> Sent: Tuesday, July 19, 2011 4:19 AM

> To: Eugene Hertz

> Cc: GreenKeys at mailman.qth.net

> Subject: Re: [GreenKeys] Hughes Printing Telegraph

> 

> VERY NICE Machine. The only ones I know are in the German communications

> museum. They have a few of them. Both weight driven as well as motor 

> driven.

> A few years ago I visited their depot/archive and took some photographs of

> them.

> If you are interested I can provide them.

> 

> I have a couple of telegrams in my collection that are supposed to be

> printed

> with this kind of machine. (around 1900 - 1920).

> The paper tape is about 10mm wide as I recall. Can measure it exactly 

> later.

> 

> 

> 73,

> Henning DF3OE

> 

> 

>