[GreenKeys] ok here is my RO 28 I am shoving keyboard into to go over on ...

[COURYHOUSE at aol.com]

ok yes   the RO  28  yes  that is a western  union  unit..  as a matter  of 
 fact to make it look   right  for the  display I need to get  rid of the 
paper holder  that says western union across the front of the machine ...  
where the base  of the paper copy sets  in... I need a plain one and a  little 
 round  bell logo to go on the  side of the tty..  I suppose if I  can not  
find a real one I could print a scanned one)
 
 
In a message dated 2/18/2013 8:39:04 P.M. US Mountain Standard Time,  
jhhaynes at earthlink.net writes:

That one  has a Western Union LESU instead of one by Teletype.  I once
traced  out the wiring of that thing, but I don't know where I put the
diagram  after I did it.

Teletype bought a lot of relays from Automatic Electric  - the company was
not required to use the parent company's relays and other  products.  It
was often easier to use products from other companies,  because some
Western Electric items were only manufactured when they were  needed;
and because the other companies were interested in selling their  products
on the open market, so they had sales organizations and catalogs  that
Western Electric lacked.

The polar relays you have there were  designed by Western Union - see
Western Union Technical Review for January  1952, p. 29.  They chose
Automatic Electric to manufacture them, and  A.E. was licensed to sell
them on the open market as well.  Teletype  apparently thought that
relay was superior to the W.E. 255A, and it was  certainly smaller.
A.E. was persuaded to make the relays with a base that  made them
interchangeable with the 255A.  Later Western Electric came  up with
a replacement for the 255A that used a mercury-wetted  contact
assembly and was non-adjustable.


jhhaynes at earthlink  dot net

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