"Ross Herbert" wrote in message
news
On Wed, 23 Apr 2008 07:49:17 +0100, "N_Cook" wrote:

:W for Wood's metal for the fusible part ?
:Googling "wood's metal" AND "fusible resistor" produces nothing


Can't say I have ever heard of Wood's Metal being used for fusible
resistors in
electrical or electronic equipment. I seem to remember that a major use
for
Wood's Metal was as the fusible element in thermal break-circuit fire
detectors
used back in the 30's - 50's. They were superseded by much better
detectors.

There certainly used to be a pellet of Wood's in the 'daisy' fire
sprinklers. I don't know of that is still the case. It's a simple, reliable,
and more to the point 'on-the-spot' and unpowered system. The lid of my
pressure cooker still has a Wood's metal pressure pressure relief valve,
which coincidentally, I replaced just last week.

Arfa