[GreenKeys] [External] Re: modified teleprinter

[Nick England]

My Inktronic-
https://www.navy-radio.com/tty/ugr14.htm
Nick

On Mon, Apr 4, 2022 at 8:37 AM Jones, Douglas W <douglas-w-jones at uiowa.edu>
wrote:

> From: Harold Hallikainen [harold at w6iwi.org] -- Sunday, April 3, 2022
> 11:29 PM
>
> > Thanks for the great history on printer technology! Right now, I really
> > like the mechanical simplicity of inkjet. The idea of spewing drops of
> ink
> > by boiling it is pretty amazing. I remember one proposal was to use
> > electrostatic deflection of the ink as it flew towards the paper.
>
> That's solidly in Greenkeys land.  The Teletype Inkatronic did exactly
> that, with an array of nozzles and deflection plates, it could print ASCII
> text at 9600 baud.  I used one at Bell Labs back in 1972-73.
>
> The first Teletype to run at 9600 baud, on the plus side, but the ink was
> like ballpoint pen ink, thick and viscous, and it tended to make occasional
> blobs that didn't dry on the page but instead transferred to your fingers
> and occasionally clothing.  Sometimes a droplet would stick to one of the
> deflection plates, and the altered field made it probable that more
> droplets would stick to that one until the resulting blob either smeared
> onto the page or blocked the nozzle.
>
> Even in normal operation, the little ink droplets tended to have little
> tails, so under magnifiction, the dots making up a dot-matrix character
> each had a little twirly tail running off in a random curve from the
> droplet.
>
>           Doug Jones
>           jones at cs.uiowa.edu
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-- 
Nick England K4NYW
www.navy-radio.com
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