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From: rfg@hound.UUCP (R.GRANTGES)
Newsgroups: net.misc,net.physics
Subject: Re: Why don't thermostats work?
Message-ID: <418@hound.UUCP>
Date: Fri, 2-Mar-84 01:02:07 EST
Article-I.D.: hound.418
Posted: Fri Mar  2 01:02:07 1984
Date-Received: Sat, 3-Mar-84 08:25:59 EST
References: <213@unisoft.UUCP>, <244@heurikon.UUCP>, <4376@amd70.UUCP>, <212@cbneb.UUCP>
Organization: AT&T Bell Labs, Holmdel NJ
Lines: 13

Fortunately, I think, I have missed 100 of the last 102 items on this
subject. However, if you must know about electric blankets: everyone is
right. There are temperature sensing devices (thermostats?) in 
the blanket itself  the control box. The one in the control box is
the one that controls the amount of current to the blanket, hence, its
warmth. As the room gets colder, this control heats up the blanket more.
There is an adjustment for how hot do you want to be anyhow, sometimes
two adjustments: one for each half of the bed.
The temperature sensors  the blanket itself are there to 
keep you from burning up if something goes wrong and the blanket
overheats (say you have covered part of it with a heavy blanket or stuck
the heating wire under the mattress). Think of these sensors as fuses.
Dick Grantges hound!rfg