[GreenKeys] Type of Underwood Ribbon For Teletype Machines

[Kevin H. Phillips]

I have noticed the issue with some plastic spools not working in 
Teletype machines.  The problem comes with the holes or slots around the 
center aperture (if that's what it can be called) of the spool where the 
main shaft goes.  Next to the main shaft is very small little peg or tit 
or whatever you want to call it which engages those holes around the 
center opening.  That's what really drives the spool.  The center shaft 
is completely smooth.  On some plastic spools I have used the smaller 
holes are either too small or in the wrong position to slip over the 
little peg.  The old metal spools seem to be pretty uniform in design 
and will always engage that little peg.  It may be the distance of the 
holes from the center of the shaft.  Whoever designed some of the 
plastic spools either didn't realize how important that little peg was.  
I guess it is a hit-or-miss situation with plastic spools.  Some will 
work; some won't.

73

Kevin

W5TTY
(hopefully soon to be on i-Telex)

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus