Willis Lamm's
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| Marbelite 4-Way Signal |
Part Three
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Once all the wiring checked out it was time to install the Presto-Brite sign box. Presto Brites were common in Seattle as many of the 4-way signals had illuminated signs hanging underneath. Each side of the Presto Brite was 12" x 18" and the panels were made of translucent fiberglass.
Inside the top of the Presto-Brites are four sockets in which standard 69 watt signal bulbs were installed. The four lamps provided relatively uniform illumination of the sign panels and also provided redundancy should any of them burn out. |
Up and running.
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Using the scaffold to hang the light.
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Final power check once the signal was wired to the controller.
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