Guessing Game Mk III : What Engineering Marvel is this.?

All I can say is about 3 of you have part of the answer each! You are all so close.

Another clue- it does not 'do' or create anything. It does not require power. It's purely mechanical in its workings (look at the picture and think!). You might find it in its various forms near a laboratory, engineering shop, or pathology practice.

I'm chasing an answer that has 3 components- what element it holds, the state of what it holds, and a description of its purpose. I've already alluded to the element answer. It's technical name as I understand it, is not commonly known, so I'll accept the 'purpose' in lieu of this, and elaborate later!

It holds a liquid that is decanted as a gas.
The pressure is regulated.

Cryogenic nitrogen tank.
Insulated tank holding the Nitrogen in liquid form.
Used for cooling of materials as it is innert and easily transported..

Quote:

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Originally Posted by 101 Ron

Cryogenic nitrogen tank.
Insulated tank holding the Nitrogen in liquid form.

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"Give that man a New"! A winner is you.

What we are looking at is a PLC or Portable Liquid Container. It's a bulk liquid supply option- this one contains Liquid Nitrogen. It is essentially a giant thermos pressure vessel with various valves and dip tubes inside to allow vapour (gas) or liquid withdrawal. The liquid is a cryogenic liquid, at negative 196 Celsius. You often find these on the back of trucks which decant liquid nitrogen to doctors, vets, or industrial sites for shrink fitting pins bearings etc. Some examples are stationary units which are usually sexy stainless steel, sometimes they are a bit more beaten up for utilitarian use, like this one, at a respectable 30 years old. The liquid nitrogen inside is decanted into dewars, which are similar to an extremely insulated cup... not sealed- unlike the PLC.

The PLC has a schematic of the pipes and tubes on the bottom RHS of the tank- these pipes allow the vapour pressure to be regulated to prevent it from blowing up, as well as allowing liquid withdrawal from below the liquid line. There is a pressure building circuit as well, which can be manipulated as required. The gauge on the LHS measured the liquid level inside the tank which is measured in inches of water... ie the height of the liquid level across the horizontal cylinder vessel under the outer skin and all the insulation layers).
https://www.aulro.com/afvb/images/im...017/07/233.jpg


Someone suggested 'Nitrous oxide'... Nitrogen has a number of different oxides which should not be confused with elemental nitrogen:
N₂ - Nitrogen (70% of the air we breathe- safe in most instances as long as it doesn't displace the oxygen you need to breathe. Compresses to a liquid at low temperatures)
N₂O - Nitrous Oxide (used as an anaesthetic, and an oxidiser for engine boosting. Also known as laughing gas, commonly found on 'fast and the furious' films)
NO - Nitric Oxide (a pollutant that is a precursor to acid rain. It's also used for semiconductor manufacture, and has roles in various biochemical pathways- pretty useful little molecule!)
NO₂ - Nitrogen Dioxide (Used as rocket fuel, and an industrial precursor to Nitric acid, HNO₃).

Here endeth the science lesson, I promise.

Over to you Ron!

Nitride?

I am punching this out on a primative tablet tonight and cannot think of any thing or post a picture easily to night.
Some one post for me.
Ron

Quote:

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Originally Posted by 101 Ron

I am punching this out on a primative tablet tonight and cannot think of any thing or post a picture easily to night.
Some one post for me.
Ron

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On Ron's request via PM- Here is his submission for everyone to guess:

https://www.aulro.com/afvb/images/im...017/07/228.jpg

I know what it is, so I'll sit this out. Ron will do the talkin' [thumbsupbig]

Sycamore seeds! Think they spin when they fall too!!!:)

It's Natural engineering. The seed pod of the maple. It flies like a Helicopter to its new home.

Thanks for that toxic.
On the last picture is a seed which uses a principle now used in a man made machine .
What is the principle and how does it make a certain type of machine safer.