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bimettalic springs

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Posted by Derwin on March 20, 2006, 10:44 pm
I have a project I am working on and I need to regulate warm air flow.

Does anyone know a good source for bimetallic springs?  I going to need
much bigger than those found in the average thermostat.


Posted by Bob W on March 20, 2006, 11:15 pm

Dunno if they can be found anymore or not, but air-cooled volkswagens
had a nifty metal bellows actuator which opened and closed the cooling
air ports. Might be for higher temperatures than you need too...

Posted by Gary on March 21, 2006, 1:28 am
 Derwin wrote:

Some hardware stores sell a crawl space vent that opens and closes automatically
depending on temperature.  I assume its a bimettalic spring.
As I recall its in the $0 area, and probably has some other useful (linkage?)
parts -- might be worth a look.




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Posted by meow2222 on March 22, 2006, 2:22 am
 Derwin wrote:

there are thermally operated pistons used to open greenhouse windows
when they overheat, probably not what you want. If otoh you can work
with elcetric control, life gets easier. Theres solenoids, motors,
servos, actuators and muscle wire. And even inflatable balloon airpath
blockers fwvliw.


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