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Re: 30th Street Station (Train Status Board)
Author: PVWB
Date: 08-02-2010 - 12:37

This display technology is called a Solari Board. They use to
be widely used in airports. I would consider these an endangered
species! Each letter or number or other symbol is on a metal flap.
The system cycles through each flap until it gets to display the
desired letter. They make a curious and distinctive tick-tick-
tick-tick-tick sound while doing this. When the train at the
bottom of the list has departed, all the rows have to move down
one position, so this generates quite a flurry of activity.

PVWB

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Subject Written By Date/Time (PST)
  30th Street Station MP 44.7 07-31-2010 - 23:42
  Re: 30th Street Station Espee99 08-01-2010 - 18:02
  Re: 30th Street Station John West 08-01-2010 - 18:23
  Re: 30th Street Station (Train Status Board) MP 44.7 08-01-2010 - 19:47
  Re: 30th Street Station (Train Status Board) PVWB 08-02-2010 - 12:37
  Re: 30th Street Station (Train Status Board) MP 44.7 08-02-2010 - 22:19
  Re: 30th Street Station Freericks 08-01-2010 - 22:49
  Re: 30th Street Station MP 44.7 08-01-2010 - 22:55
  Re: 30th Street Station Tom McCann 08-01-2010 - 23:26
  Re: 30th Street Station MP 44.7 08-01-2010 - 23:55
  Re: 30th Street Station Mitch 08-02-2010 - 01:32
  Re: 30th Street Station MP 44.7 08-02-2010 - 16:22
  Philadelphia Art Museum John West 08-02-2010 - 08:30
  Re: Philadelphia Art Museum Freericks 08-02-2010 - 09:31
  Re: Philadelphia Art Museum MP 44.7 08-02-2010 - 16:20


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