[GreenKeys] A Little More TWX History

[Bruce Gentry]

In the Air force, we had some Alden fax machines. They worked rather 
well, and didn't smell up the room. We had far fewer repair calls for 
them than the Litton Industries machines that had three magnetic print 
heads on a cog belt to scan the paper. The heads pressed on carbon paper 
to create the image. We also had a TXC-1 for standby use, it could be 
very smelly because it burned a layer off the special paper to create 
the image.

      Bruce Gentry, KA2IVY



> On Tue, 26 Nov 2019, Harold Hallikainen wrote:
>>
>> I used to do contract work for Alden (I think that's the company 
>> name) in
>> MA. They made wet paper fax machines for distributing weather maps to 
>> the
>> FAA Flight Service Stations. This was linear FM over a phone line. A
>> rotating drum with a helix on it provided horizontal scan while the 
>> paper
>> was pulled up by another motor. The helix would pass current through the
>> paper to turn it brown.
>
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