[GreenKeys] Dow-Jones printer

[Duncan Brown]

i was at the AWA Museum today, so got some more info on the Dow Jones 
Broad Ticker.

Patent numbers:
D87174   "News Ticker Casing or Stand"  1932
1832160 "Feeding Mechanism for Printing Telegraphs" 1930/31
1957076 "Printing Telegraph"  1932/34 (seems to be the main patent)
1957088 "Switch"  1932/34
1979510 "Telegraphic Printing Mechanism"  1932/34

1832160 is assigned to Dow Jones & Co.; the rest are assigned to the 
Financial Press Companies of America


The big magnet on the end operates the escapement mechanism that rotates 
the print wheel. See photo #51 enclosed.  The grey cast semicircle in 
the foreground has patent # 1667531 on it. That patent is for a "Sound 
Reproducing Apparatus" (1926/28).  They apparently used loudspeaker 
voice coil to drive the escapement!

There is a mystery box mounted in the front of the printer which can be 
seen in all of the enclosed pictures.  It has a disk sticking out of the 
top of it which can be rotated, but there are no mechanical or 
electrical connections to it???

You can also see some examples of the type in pictures 54 & 55.

(sorry about the quality of these pictures. I meant to bring a real 
camera to the Museum today, but forgot.  These were taken with my phone, 
which doesn't do a very good job on closeups.)

Have fun,

Duncan
K2OEQ


On 14-Dec-15 22:32, Jim Haynes wrote:
> I assumed the one in the ARTS article was also upper case only.
>
> I can read one of the patent numbers in your photos  1,957,076 and
> that patent shows something that does appear to operate on the old
> stock ticker principle, in that there is an escapement connected with
> that big permanent magnet, and the transmitter involves a shaft that
> rotates and stops at a particular position when a key is pressed.
> It's a patent that wasn't filed for until 1932 and not issued until 1934.
> Which is pretty late for that kind of printing mechanism.
>
> Can you tell us what other patent number(s) are on the patent plate?
>
>
>



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