On Fri, 16 Jul 2004 21:05:24 -0400, "Leslie Watts"
wrote:

Terry,

I developed the polymer ptc heater used in auto side mirror defrostng
heaters. There are some
patent references in my engineering link below. (click links)

I think what you are refering to though is a ceramic device commomnly used
for
motor overtemp protection and tv crt degaussing. It is about the size of a
quarter...
and costs about a quarter in large quantities. MuRata makes a lot of them.

Les Watts

http://www.lmwatts.com

way cool thing and with your name too!

Gunner



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