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Author Topic: Old teletype machine  (Read 3344 times)
W4MEC
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Posts: 6




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« on: June 23, 2008, 07:03:09 AM »

Ok fellers, has anybody owned one of these at anytime? This is an old page printer machine, but the platen moves back and forth like a typewriter, for that matter it looks just like a typewriter, albeit big and heavy and noisy. The cabinet it is in, weighs a ton, is felt lined, has a front door that opens like the hood of a Ford Model A, and a back door that opens like the rumble seat to put the paper in.  There is a hole in the right side so that when the carriage returns to the right, the paper advance knob will stick out the side, and this is the cabinet which is correct for the machine. I have used this thing since 1970, and when the motor burned up in '75 or so, Typetronics down in FLA had a motor for it and knew this machine as a  Model 100.  I have tried to find any info on this thing for years with no luck.  It is still fully operational, and prints quite well.
When you Google up a Model 100 machine, it looks nothing like the one I have.  The only other place I have seen one, was in a movie made in or about 1939.  Fairly sure it is US made, maybe Western Unions design, but like I said, info is wrong on non-existant.

Charlie, W4MEC in NC
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KE4DRN
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Posts: 3714




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« Reply #1 on: June 23, 2008, 04:50:58 PM »

Hi Charlie,

Take a look here, you may find it !

http://www.nadcomm.com/

73 james ke4drn (raleigh nc)
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W5RKL
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Posts: 889




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« Reply #2 on: June 23, 2008, 08:40:36 PM »

The teletype machine you have described appears to be
either a Model 15 (no TD or Reperforator) or a Model 19
which has a keyboard, printer, TD, and Reperforator
all on one desk/table. The standard speed for these
two machines was 60 wpm. The keying voltage was 130VDC
at 60ma. The motor ran on 110VAC.

The Model 15 had the keyboard contacts and the
printer selector magnets wire in "series". The
Model 19, however, usually had each device, the
TD, Reperforator, and KSR, wired individually
to a patch panel. That gave flexibility. They
same was the case with the Model 28's and Model 35's.

The Model 15 and 19 have been tested at 100 wpm
but they didn't last long at that speed. Springs
started to fly off which caused parts to bend,
break, and/or jam. Therefore, I don't recommend
operating a Model 15 or Model 19 at a speed higher
than 60 wpm.

If you have a much smaller table top plastic covered
teletype, you may have a Model 33. The Model 33
came in two types, ASR Model 33 or the KSR Model 33.
They both came as table top models OR on a metal
stand.

The differences were, the ASR model 33 had the TD,
Reperforator, Keyboard, and printer all in one.
The TD and Reperforator were mounted on the left
side. The KSR Model 33 did not have the TD
and Reperforator, only a keyboard and printer.

The Model 33 ASR or KSR, were 8 bit ASCII machines
that operated at 110 baud. They were used as
civilian computer data entry machines and as
communications systems in the Navy. I used one
everyday in the Navy as a communications terminal
between the ship and the communications station.
I never liked them, broke down more often than
a Model 28 did!

I was a teletype repairman in the Navy for 22 years
and worked on all modes of the Model 28 and Model 35
machines including the TD's, Perforators, and
Reperforators.


73
Mike
W5RKL

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W5RKL
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Posts: 889




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« Reply #3 on: June 23, 2008, 08:52:25 PM »

The Model 15 and Model 19's platen did move from
left to right. The Model 28 and Mode 35 did not.
The Model 28 and Model 35 platen's were stationary
while a "type box" moved left to right and up and
down, to print the characters on the page. The platen
had an "automatic" carriage return and linefeed
at the 72 character, providing the adjustment was
done correctly, that move the type box to the left
margin and advanced the page one line upwards.
I don't think the Model 15 and 19 had this feature
but I could be wrong. It's been a long time since
I worked on a Model 15/19 but the Model 28 and 35,
no problem.


73
Mike
W5RKL
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W4MEC
Member

Posts: 6




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« Reply #4 on: June 25, 2008, 09:26:14 AM »

James, that't it!  When I clicked on the heading "5 Level Machine" on the site, the pic that came up of the 2 machines in green cabinets with their fronts open were the exact model.  Emailed the curator to see if I can get more info.  Thanks for that link.  

Charlie
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W5HTW
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Posts: 729


WWW

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« Reply #5 on: July 13, 2008, 05:35:59 PM »

The Model 19 had automatic carriage return and line feed.  These were used in RTTY (and just TTY) service by many users, including TELEX landline phone systems. There was a version of the Model 15 which was used by Western Union , known as a WUX machine.  It printed on paper tape that could be pulled off and stuck onto the Telegram form.  It had no carriage return or line feed encoded, but if it also printed a page copy, that was included.  Most did not.  Only printed the paper tape with the sticky back.

There was also a Model 26, I believe, which had a gear box that could be used at 60, 75 or 100 wpm, but it was not too comfortable at more than 75 wpm.  The Model 28 had a gear box as well, and could actually be geared down to 60 wpm, but ran comfortably at 100 wpm.  Nearly all of our 28s were set to 100 wpm.  We had a few 26s set at 60 wpm for special use.

By the late 60s we had shifted to all 28s, except for one 33 used in mainframe computer programming.  

Because of the type block use on the 28, I developed a favorite joke.  I would format a message, with header, and then, following the opening BT, would send nothing but line spaces, and other non-printing functions, including line feeds, and then wrap up that 'nothing' with the ending BT and the NNNN end of message code.  It left the recipient staring at a blank piece of paper and wondering what was wrong with his machine.  

My other trick was, when he notified me he had to change a ribbon, I would stop transmitting, giving him just enough time to get his fingers involved.  I'd then start transmitting some test stuff.  Never failed to draw an irate response form the guy on the other end.

Since we kept a support link up on CW, that would often result in some frantic "QRT QRT ZTGF4" (our Z signal for RTTY) sent at 20 wpm on the straight key!

ed
 

 
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AC5UP
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Posts: 3825




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« Reply #6 on: August 25, 2008, 10:16:00 AM »

Even though this thread is long of tooth, here's a link that might be useful:

http://hertzmail.com/TTY/
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