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From: cwb@cbneb.UUCP (Bill Brown)
Newsgroups: net.misc,net.physics
Subject: Re: Why don't thermostats work?
Message-ID: <212@cbneb.UUCP>
Date: Thu, 1-Mar-84 20:14:14 EST
Article-I.D.: cbneb.212
Posted: Thu Mar  1 20:14:14 1984
Date-Received: Sat, 3-Mar-84 09:23:45 EST
References: <213@unisoft.UUCP>, <244@heurikon.UUCP>, <4376@amd70.UUCP>
Organization: AT&T Bell Laboratories , Columbus
Lines: 8

I always figured there was some sort of temperature sensing device in my
electric blanket since there are three wires between the box and the blanket.
I know the box has a switch because I hear it click.  My guess is that a
thermister or some such device controls the current in the third conductor
in such a way as to influence a bimetal switch in the box.  

Why doesn't somebody tear one apart.  I would, but I can never get these
kinds of things back together.