Acrylic bends and melts around 160C or 320F. And you can knock vent holes in it pretty easy
The 14 has 4 vent holes in the top of its case on the left and right 
All that said I highly doubt the interior temp would ever get that high with or without vent holes.
And depending what you greased the teletype with it would probably run better on the warm side. ;-) 



 

On Sun, Jun 26, 2022 at 12:01 AM Jones, Douglas W <douglas-w-jones@uiowa.edu> wrote:
From:  Chris Elmquist [chrise@pobox.com] -- Friday, June 24, 2022 8:51 PM

> And these guys have square and rectangular ones,
> -- https://www.shoppopdisplays.com/display-boxes-and-cases/5-sided-acrylic-boxes/transparent-and-clear-acrylic-boxes.html

I'd be wary of putting a Teletype in an un-ventilated plastic box like those.  The motors put out enough heat that the air inside could get warm.  The ABS case of a Model 33 is pretty big and it gets warm.  Put the same motor and a compact print mechanism in a smaller plastic case, and it'll get significantly warmer.

          Doug
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