Re: red alert

Posted by RogerDetroit On 2015/7/2 9:43:54

Hello Guscha:

Correct - only the POINTER changes color, the background numerals always stay white.

While the front of the pointer is smooth, the back has a saw-toothed finish and is thin at the tip and grows wider toward the base. Between the pivot joint of the pointer and the wide base is a upward facing light bulb. Just above the bulb is a curved piece of celluloid film -type material ranging in color from green to amber to red. As the pointer swings in an arc (as speed increases) it passes over the green section to amber and then to the red section of the colored film.

The pointer must be similar to Lucite with its "light piping" characteristics.