Bourdon Gauge

[Neil WyattModerator @neilwyatt]

Brilliant. Thanks Steve – I suspect an 1865 magazine is out of copyright!

As it was patented in 1849 and the patent expired in 1875, and the two stamps are apparently genuine I think I can safely assume it is (a) of Bourdon's own manufacture and (b) it probably dates for the 1860s.

Neil

[Francois MeunierParticipant @francoismeunier96697]

the original patent by Eugène Bourdon for its" tube" and application can be found on the INPI site, base brevets du 19ème siècle.

this a manuscript, hardly readable : 33p of finely hand written text with a few figures, looking really odd.

you can read only, no downloading, but you can order a copy. pretty deceptive!

hope lhe link works ,

http://bases-brevets19e.inpi.fr/Thot/FrmLotDocFrame.asp

[Neil WyattModerator @neilwyatt]

Thanks Gedeon,

My french isn't too appalling, but I can't find their 'cherche' box anywhere!

Ah, I need to "acceder aux service"…

Blimey his "pompe alimentaire perfectionnée" of 1937 sounds a bit nasty!

This is the document (you may need to accede to see it): bases-brevets19e.inpi.fr/Thot/FrmLotDocFrame.asp unfortunately my french is only able to pick out odd words from lightly pixelated 19th century handwriting!

Google has the 1852 US patent which is a bit more readable (auto-OCR'd so full of spelling errors!) It confirms he knew it would work for vacuum as well as pressure from the start.

It's interesting that he thought of using it for a governor.

Neil

[Ian S CParticipant @iansc]

Steve, if you look up "English Mechanic" vol VII no 180 Friday September 4 1868, you will find Bourdon's improved steam or air engine. Picture on the cover page, article on page 511. Bourdon's engine used a flyball governor.

Ian S C

[Neil WyattModerator @neilwyatt]

Just to bookend this thread, Stub has put a little write up on his website.

Neil

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