>>> IIRC, you could punch up a control card that defined tab stops

>> I think you are remembering keypunch machines, not teletypes.
>> One annoyance of the model 041(?) keypunch machine

> I only remember the 029 cardpunch - but it sounds like what you're
> talking about.  There was quite an art to using the program-card drum,

The 80 column Hollerith cards were hand punched on the IBM 026
and later 029 models.  I just noticed, that even after all these
years, everybody calls it an 0xx (_with_ the leading zero).

I don't remember the IBM model numbers for the computer peripheral
card punches.

There was also the smaller System 3 card with 96 columns (3 rows of
32 characters).  I never hand punched those and don't recall the
machine's model number.

I did do an embedded controller for a System 3 multi-function card
read/punch/print device once.  Goal was data transfer between CP/M
systems and the System 3.  It worked too.  A fascinating contract.
Not lucrative, since I underestimated the work involved...

>> caused the [keypunch] to jam.

> I do remember the special hook-ended knife used for getting bits
> of jammed card out from under the punch-head, though!  :-)

Wow, I haven't thought of that in a while.  [pause]  Just checked;
I've still got one.  Mine has saw teeth on the back side, opposite
the hook-end.  Cards were sometimes really jammed in there.

						Lee Jones

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