-=> Jasen Betts said to Greg Mayman
 -=> about "{at}%^{at}#$%^ VEROBOARD" on 04-01-04  18:30.....

 JB> bimetalic timers are common in pop-up toasters :)

Indeed they are!

 JB> hmm, that would be faster... but I'm sure I saw a bimetalic strip, but
 JB> I didn't see the device running (it was non-functional before I opened
 JB> it). maybe  the strip was for temperature compensation...

That's possible.

 JB> OTOH I've seen bimetalic strips in christas-tree lamps, and other
 JB> self-blinking lamps :) but they only do about 1 per seconds or less.

I was forgetting them. But the ones Ive seen usually take 5-10
seconds per cycle.

 JB> the switches to control cooking rings also use bimetallic strips
 JB> IIRC they switch about once per second too.

On my stove three of them use the conventional arrangement and
cycle in about 20 seconds.

But one has a thermal sensor in the middle of the ring that I
believe is intended to contact the bottom of the saucepan, and
that cyles in about 2-5 seconds.

Possibly it uses the expansion of liquid in the head to increase
the pressure down the metal tube that links it to the controller,
the same as the temperature gauge on older cars.

   ,-./\
  /     \ From Greg Mayman, in beautiful Adelaide, South Australia
  \_,-*_/    "Queen City of The South"    34:55 S  138:36 E
       v

... I used to be in an origami club until it folded.
___ Blue Wave/386 v2.30

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