[GreenKeys] 28 stock ticker?

[Bruce Gentry]

Trans-Lux. That is a name with a very interesting history. They were 
among the first to develope a method of projecting the image of a tape 
printer on a screen. More importantly, it was projected on the rear of 
the special translucent screen. The image was bright enough to be viewed 
in subdued room light with ease.  They also created a chain of theaters 
that specialized in newsreels, with short subjects and "music videos" 
added in. In all cases, the projection was on the rear of the screen and 
the auditorium was lit enough to allow the viewers to read the programs 
and not stumble in the dark. Seating and asile arrangements made it easy 
to come and go at any time, most viewers would stay until the program 
began to repeat. It would seem very reasonable to have a stock market 
"crawl" across the bottom or top of the screen as we do on TV news 
channels today.  If the tape that ran through the printer and then the 
projector was clear, was it cleaned and re-used, or trashed?

        Bruce Gentry,  KA2IVY


On 7/30/19 2:48 PM, Jerry Murphy wrote:
> Attached are two picture of the 900 stock ticker that I had.  It started life
> as a Trans-Lux machine and had a slack tape control.
>
> Jerry Murphy
>
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> -----Original Message-----
>> From: "w9ddd at tapr.org" <w9ddd at tapr.org>
>> Sent: Jul 30, 2019 10:32 AM
>> To: greenkeys at mailman.qth.net
>> Subject: [GreenKeys] 28 stock ticker?
>>
>> I always assumed a newer stock ticker from Teletype would be based on the 28 tape printer.  I was wrong.  Looking at http://www.navy-radio.com/manuals/tty/jh/bsps/bsp/570series/573-140-100TC.pdf, I discover a different approach..  It's a 6 level 135 baud device the uses a type box instead of the wheel like on a normal tape printer.  Also it types on 1" tape.  Of course it has fractions as well as some other special charters.
>>
>> Wonder if anyone ever saw such a beast?
>>
>> John, W9DDD
>>
>>
>
>
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