[GreenKeys] WW2 IBM radioteletype network?

[John Nagle]

> Date: Sun, 5 Oct 2025 04:05:16 +0000 (UTC)
> From:"hwhall at aol.com" <hwhall at compuserve.com>

> Subject: Re: [GreenKeys] WW2 IBM radioteletype network?
> Message-ID:<1591403025.208125.1759637116354 at mail.yahoo.com>
> Content-Type: text/plain; charset=UTF-8
> 
> Was that a question concerning IBM's existence in the 40s??Computing-Tabulating-Recording Company (CTR) was renamed "International Business Machines" in?1924. I've been restoring impulse clocks from 1944-45 that were made by "International Business Machines Corporation". Their name is so intertwined with digital computers that it seems odd to think they predated WWII.

IBM predates WWI.

The clocks were an early product, which was eventually spun off as 
"Simplex". The Simplex clock business is
still around, after far too many mergers and sales, as

https://simplextimerecorder.com

Those classic clocks were controlled by tones over the power line. There 
are some filters and thyatrons inside each clock.

				John Nagle