[GreenKeys] FAX in an early movie

[Jones, Douglas W]

On 01/20/2016 12:13 PM, Richard Knoppow wrote:
> FAX among other things is shown in a 1937 industrial at:

Not only an old fax machine, but they use an acoustic coupler to connect it to the phone line.

The movie doesn't discuss the use of an audio carrier for the analog brightness signal, but aside from that it's pretty good.  I like their use of the string rolling machine to demonstrate scanning.

		Doug Jones
		jones at cs.uiowa.edu