[GreenKeys] Code Permutation Tape Printer

[John Nagle]

> From: Duncan Brown <duncanancy at earthlink.net>
> To: COURYHOUSE at aol.com, Jim Haynes <jhhaynes at earthlink.net>, 	Green
> 	Keys <greenkeys at mailman.qth.net>
> Subject: Re: [GreenKeys] Code Permutation Tape Printer
> Message-ID: <529652FA.2050808 at earthlink.net>
> Content-Type: text/plain; charset="iso-8859-1"; Format="flowed"
> 
> When I saw the tag with "2C-3" on it, I immediately thought about the 
> Teletype Corp Museum items.  It took a little digging, but I did find 
> it!  Museum Book page enclosed.
> Duncan
> 
> On 27-Nov-13 12:38, COURYHOUSE at aol.com wrote:
...

>> >     Looks like something that came from the Teletype museum - and an
>> >     experimental unit.

   The machine on eBay shows some of the same parts missing as the
drawing in the museum book.  This may be the exact machine shown.

   It has some similarities to the early Morkrum Model 11
tape printer, which was a typewheel machine, but the
selector mechanism is completely different.

   The keyboard is built out of early Model 14 era parts, but
the keyboard shaft, cams, clutch, and gear are missing.  This
may have been a prototype to test a new printing mechanism,
and so the keyboard mechanism was never fully built up.

   It's a six-bit machine with no shifts.  Strange character set;
no "1", no shifts, and no fractions, so it's not a 6-bit stock
ticker machine or a Teletypesetter machine.

   It's hard to see exactly how the selector works, but the
general idea was clearly that the typewheel rotates until
all 6 bits line up with the binary encoded disks, and then
something prints.  I'm not sure if the typewheel stops for
printing.

   The six levers on the left at probably are supposed to
be under the T-shaped bail, rather than on top of it.

   It looks like an attempt to make a small, low parts
count tape printer with keyboard.  I wonder if it ever
worked.

   Anybody want it?  It's near me, and if the price
doesn't go up, I might buy it.

				John Nagle