[GreenKeys] Model 33 Progress

[drlegendre .]

Re: TTY ribbon reversal mechanisms

For what it's worth, my own M15 KSR uses rivets (eyelet type) at each end
of the ribbon to trigger the reversing mechanism. I would expect that most
if not all M15, and related hardware (M14, M19, etc) would use the same
system.

As the ribbon approaches the end of a spool, a rivet contacts a reversing
arm, which actuates the arm and reverses the mechanism. Very cool system.

On Sun, Dec 4, 2016 at 12:53 PM, Richard Knoppow <1oldlens1 at ix.netcom.com>
wrote:

>     I am curios, the Underwood ribbons have eyelets at each end to work
> the automatic ribbon reverse. This is also used in some other machines.
> Some typewriters used other ways of reversing the ribbon, some sensing the
> tension in the ribbon when it gets toward the ends, some with a special
> spool (Royal). In machines that do not need the eyelet they should be
> removed by cutting off the ends of the ribbon. If not they can jam the
> machine. I don't know what method Teletype uses for reversal.
>
> On 12/4/2016 1:04 AM, drlegendre . wrote:
>
>> Standard 'Underwood' pattern typewriter ribbon. Very common and
>> available for little cost on eBay..
>>
>> On Sun, Dec 4, 2016 at 12:19 AM, Brad via GreenKeys
>> <greenkeys at mailman.qth.net <mailto:greenkeys at mailman.qth.net>> wrote:
>>
>>     So after trying to get the 33 to print improperly via hairdryer.. I
>>     gave up.
>>     Usually when I'm done with the machine I unplug it, but this time I
>>     forgot
>>     and it sat switched off but plugged in for about 4 hours.  When I
>>     turned it
>>     on.. voila.. totally random characters.  In fact, in some cases it
>>     wasn't
>>     even tripping the clutch where the range finder is so nothing was
>>     actually
>>     being printed.
>>
>>     Now waiting for it to cool before I try again..
>>
>>     By the way -- the ribbons for these things... are they anything
>>     special or
>>     are they just standard typewriter ribbon?  Need a new one badly.
>>
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> --
> Richard Knoppow
> 1oldlens1 at ix.netcom.com
> WB6KBL
>
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