Please read this stuff.. In the two videos (see links below) I show you how successfully repaired a mercury wheel barometer. When the barometer arrived it ha…
Please read this stuff.. In the two videos (see links below) I show you how successfully repaired a mercury wheel barometer. When the barometer arrived it ha…
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Hi, thanks for the tip. I know that mercury will amalgamate with gold, if
you get it on a gold ring it’s the very devil to shift. All the best …
Andy
I excluded all of the air from the tube but then as you tip the barometer
the right way up so the mercury falls and pulls a vacuum at the top of the
tube so it looks like there is air at the top but it’s a vacuum. It’s the
‘suck’ of that vacuum at the top of the tube that holds up the mercury and
stops it all running out of the top of the ‘U’ bend at the bottom of the
tube. So the mercury measures the difference in the ‘suck’ (vacuum) at the
top and the atmospheric pressure. Kind regards.. Andy
Hey, I can remember seeing fish in the canals around Birmingham, I used to
play along the canal behind Birmingham University and guys would go fishing
there, and at Cannon Hill Park. I think now you could use the water from
the canal as a weapon of mass destruction, but no, never been fishing. Kind
Regards … Andy
Hi Andy ,,very interesting did you end up with air at the top off the bulb.
Regards
Thanks for the input Kind Regards … Andy
Hi Dennis, these switched, the bigger ones, are from old Delapena induction
heaters, they were used in the control circuits mounted on relay
mechanisms. I don’t think they were particularly high current but I think
they would handle DC as the mercury doesn’t oxidise and they have a wide
degree of separation when open circuit. All the best … Andy
evidently mercury has more surface tension than water, very cool.
Easy way to get the beads out is a small piece of bare copper wire with the
end formed into a small loop, it amalgamates with the mercury and allows
you to pick up the droplets and deposit them in a small glass bottle. When
finished cut off the contaminated tip and wrap in a plastic bag.
Good luck on repairs, the last time i seen mercury was old switches they
were used for high currant beacuse when contact was made it was never in
same place like a relay Dennis Wis
Thanks for the reply Andy , that’s saved me time and effort trying to
remove a vacuum . Regards
thank you for posting this video. I found it very fascinating. I bought a
small banjo style aneroid barometer a couple of years ago and have been
fascinated with them ever since.