question about electric range burner controls

Posted by on January 30, 2009, 4:25 pm

x-no-archive:

> =A0Most of them
> are simply variable resistors...........

why do people that are GUESSING at the answer feel the need to post
their GUESSES and give out wrong information...

Mark

Posted by J. Clarke on January 30, 2009, 5:53 pm

makolber@yahoo.com wrote:

> x-no-archive:
>

>> Most of them
>> are simply variable resistors...........
>>

>
> why do people that are GUESSING at the answer feel the need to post
> their GUESSES and give out wrong information...

OK, so how do they work, o expert?

--
--
--John
to email, dial "usenet" and validate
(was jclarke at eye bee em dot net)

Posted by on January 30, 2009, 9:17 pm

> makol...@yahoo.com wrote:

> > x-no-archive:

> >> Most of them
> >> are simply variable resistors...........

> > why do people that are GUESSING at the answer feel the need to post
> > their GUESSES and give out wrong information...

> OK, so how do they work, o expert?
> --
> --
> --John
> to email, dial "usenet" and validate
> (was jclarke at eye bee em dot net)

Nick explained it correctly..

If they used a "variable resistor" the control would get as hot as the
element.

Mark

Posted by Lp1331 1p1331 on January 30, 2009, 10:05 pm

There was another control that didn't cycle off and on like the infinite
controls. It was the old seven button push button switch that GE used to
use. The burner itself was two separate coils with four terminals. I
don't remember if the individual coils were the same size, or if one was
larger than the other. As I recall (it's only been about 35 years since
their operation was explained to me) the switch had a neutral going to
it as well as the two hot leads. On the highest setting it put a
constant 240 to both segments of the burner. On the lowest, the switch
put both segments in series and put 120 to it. The settings between
highest and lowest did various combinations of voltage and
series/parallel on the two segments of the burner. I forget the exact
sequence from low to high-- I always wondered how long it took someone
to design the switch to do all the different configurations. They must
have been pretty reliable. I don't remember ever changing one when we
used to work on stoves, and I still see some in operation. Larry

Posted by on January 30, 2009, 10:44 pm

On Fri, 30 Jan 2009 18:17:03 -0800 (PST), makolber@yahoo.com wrote:

>Nick explained it correctly..
>If they used a "variable resistor" the control would get as hot as the

Nick is right.
There is a bi-metal strip (bends when you heat it) with a contact
point on the end and a coil of wire that is energized when the contact
makes. As it heats up, along with the burner, the contact opens. When
the bi-metal strip cools the contact makes again. They move the other
contact in and out when you turn the knob to regulate when it breaks.
As they age the strip takes a set and is not linear anymore.

http://gfretwell.com/electrical/stove%20control.jpg

From a Whirlpool cooktop

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