[GreenKeys] CRLF or not CRLF?

[Jim Haynes]

> On 30-Jul-17 16:04, Richard Knoppow wrote:
     I have been following this discussion with great interest. I also 
read 
> over some patents for automatic CR-LF. I wonder how this was handled on 
> radio circuits to avoid having two CR-LF at the printing machine. Of course 
> I have been aware that many machines were set up for automatic CR-LF but 
> until now had not thought about how it actually worked and some of the 
> problems created by it.

It was typical to set up typing units for the right margin at the 72nd
character position.  Which means the margin bell rings somewhere before
than, maybe 67 characters.  So the auto CR-LF would be set up to operate
on maybe the 75th character and the right margin stop set a little beyond
that.  If the sending operator is paying attention the margin bell then
he will send CR-LF as soon as possible after the bell rings, and
definitely short of the 72nd character.  So the machine never gets beyond
72 characters unless a CR is missed.  Then the auto CR-LF will catch it
beyond the normal place and operate.