Is this an aero tool?

[boguing]

From a WW2 RAF ground engineer's toolbox. Possibly an oiler, but why the large hole in the top and the tiny hole in the bottom, adjacent to the 'working' tube? Maybe something missing internally, but Dad would have either thrown it away or made a replacement part, so not very likely.

Your input would be most welcome!

https://lh3.googleusercontent.com/-fnUIbdmrDgU/Vh1JXL7UtEI/AAAAAAAAGJY/wmWg2CXxGKs/s640-Ic42/IMGP0158.JPG
https://lh3.googleusercontent.com/-SsaC5ub6kt8/Vh1JL4XbPHI/AAAAAAAAGJA/UKIWWsm8SZM/s640-Ic42/IMGP0163.JPG
https://lh3.googleusercontent.com/-k_WbS816A8o/Vh1JTdJjvyI/AAAAAAAAGJQ/x_EeF4PU9Ds/s640-Ic42/IMGP0161.JPG
https://lh3.googleusercontent.com/-HqGASz-F2xw/Vh1JPlSkSxI/AAAAAAAAGJI/XNPHh97xEO0/s640-Ic42/IMGP0162.JPG

[Genghis the Engineer]

I've never seen anything like it before, but it seems not impossible that it's designed to fit to the end of a grease gun to inject grease into a very small hole?

G

Guessing?

[boguing]

I did wonder if it was a small grease gun missing it's plunger, but that could work.

I've got (maybe one of) his grease guns somewhere - I'll have a look and see if it has an end that might fit.

[Chesty Morgan]

With the shape of the pointy bit it could also be part of an enema, or urethral, syringe.

[boguing]

CM, that wasn't something that I wanted to Google over breakfast! I do see what you mean, but the edges of the needle are eye-wateringly sharp, and it would be a very short, ahem, urethra...

Two more pics for size and detail.

https://lh3.googleusercontent.com/-OR_Gonv5c0c/Vh4OuEfLo1I/AAAAAAAAGJo/MZixoMW2QZg/s640-Ic42/IMGP0167.JPG

https://lh3.googleusercontent.com/-NzaZI3jebvg/Vh4Ox-z5nlI/AAAAAAAAGJw/K4jVrOzcF6Q/s640-Ic42/IMGP0169.JPG

[N707ZS]

Could it be something to do with tyre inflation? The fat end looks like its made for a hose, and with it having "patent applied for" on it, its not a one off home made tool.

[Pozidrive]

Yes N707, I've just logged in to mention tyres!

I've seen hypodermic needle type pressure gauges, pushed in through the rubber which then self-seals. Also think of football and rugby balls - a valve that's designed to have a needle pushed into it.

If it had a Patent number instead of "Patent applied for" it would be easier.

Re-think - the small hole at the sharp end - does that connect with the body of the tool?

[boguing]

All three holes open into the chamber. That's what really puzzles me - why the tiny hole?

If the largest hole is blocked by 'other apparatus' then one thought is that it forms a basic fluid diode - if the tool has a purpose connected with fairly viscous liquids.

[Planet Basher]

Could those holes represent a static/pitot tube type of device that works above a certain speed with the chamber acting as a plenum????

[Cat1234]

Adapter for pitot static test box to use existing size tubing from the test box on the nipple end and push the smaller tube inside the pipework that runs around behind the instrument panel. Not through the wall of the pipework but up inside the pipework after disconnecting an instrument or junction. Hope that makes sense.
The mystery of the the small hole is to allow air to escape as you are fitting the adapter and therefore you don't force pressure into a static instrument. You block the hole with a piece of tape or your finger after assembly.
Looks like you can fit different size small tubes to it and it would be a quite handy device.
I'm an Avionics engineer and I have many similar adapters in my toolbox that I have made using flared aluminum tube in different sizes joined with AN fittings.
Anyway, that's my guess, would work for anything you have to force air into, or out of, and modulate the rate by using your finger to cover the little hole.
cheers,
Darryn

Its cool you kept your Dads tools, I have some from mine, also an aircraft engineer, treasured possessions.

[boguing]

This just goes to show that despite the best endeavours of Fbook, Twttr and co, the intarweb can still be really useful! It's not the first time that this subsection of Pprune has delivered timely and accurate answers for me, and I doubt that it will be the last.

Thanks to Cat1234, and everybody else who chipped in, the odd brass tool will now go up on my 'special aeroplane things' display shelf, and joins a number of other things that Dad was involved with.

The fact that it is used on pitot static systems makes great sense, and probably brings the date forwards a bit. One of his inventions was the first electric vario for gliders (and which helped to pay for my early schooling) and it would seem likely that he had an interest in other pressure-related instrumentation. Testing of his vario would have been in the early to mid 1950s, so I'd guess that it's from then.

I might have a go at a patent applications search, because it's perfectly possible that it was him that contemplated it. He did hold several others which earned an income and this could have been one that didn't!

Cat1234, on the subject of keeping his tools, there is a saying that "he who dies with most toys, wins", but I think that it's a misquote, and should read 'tools'. I hope that my Son (who starts at Loughborough next year to learn to doodle aircraft) agrees with that because he has those, and a lot more, coming.

I do have at least one other mystery tool, but I'll let you all have a few weeks breathing space before I start a new thread...