OK, I have a question for those of you who either can speak/read German or know a lot about German ships. 

Today, we were moving out a lot of my Grandma's stuff (she is moving into an assisted living place) and she gave me a couple things she thought I might like.  One was this gauges from a German ship.  She said it came from a WWI German ship that had been capsured by US forces at some time (perhaps taken after the war) and put into service in our Navy.  Anyway, my grandfather (or maybe my great grandfather-she didn't say) served as a cook on this ship at some point and along the way he aquired this gauge from it (I don't know if he stole it or what-but I have it now  ).  Anyway, its in German (I think) so I can't read it.  I was just curious if anyone might know what its function was or what kind of ship it may have come off of.  I know that the ship may be hard to figure out-but I would like to know at least what the gauge is for.

I would imagine it was at least a medium sized ship because he was a cook.  But, I have no idea.

it's prolly a hydraulic pressure gauge

the scale is in kg/cm² which is about the same as bar
so the red line at 150 bar, too much for steam.

Hey,

You guys are pretty much right! Its apressure gauge made in a  factory called Westphalia in s town called Gelsenkirchen. I'm not sure about the other bit, but that gives away its use.


A.

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well, at 150 bar the boiling point is about 450°C.
i never saw a steam engine with operational pressures above 40 bar, and usually it's about 15-20.

if a circuit has that much pressure it's to prevent water from boiling rather than using steam.

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well, since steam engines were outdated when i learned my proffession i only got some general knowledge. but if it's anything like pneumatic, then in order to produce more power the pistons are enlarged rather than the pressure.

you shouldn't forget, in order to use higher pressures with steam, the temp has to be higher as well.

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i'd say depending on water dept, 1 bar per 10 metres
plus some to actually get the air into the tanks

Meh.


I just can't see where they would have had hydraulics on those ships. Only the rudders and turrets moved and the turrets for certain were mechanical.

I'm pretty certain that steam turbines powered the WWI Battleships. Hydraulic's I guess would come into play with the introduction of oil powered engines and not coal fired boilers.

did some more checking, looks indeed as if this was the pressure gauge from the oxigene bottle from an aqualung (tauchretter)

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maybe, but engine room crews got them too