Antique 1860s French French Bourdon & Richard Aneroid Barometer
Code: 19325
SOLD
For sale is Rare Antique 1860s French French Bourdon & Richard Aneroid Barometer Series 2.
Bourdon barometer having 4¾” printed open centre glazed card dial, the outer part marked with standard meteorological terms, the lower annotated “Metallic Barometer” with twin medallions for Gold Medal Exhibition 1849, cited as “E. Bourdon & Richard’s Patent, Paris,” and Universal Exhibition London 1851, cited as a “Council Award.” The inner barometric scale calibrated in inches of mercury with a range from 28 – 31 divided to 1/20ths”. Domed glass with trademark Bourdon pierced gilt index.
This is an Early pattern movement, the beam chassis struck with Felix Richard logogram. All contained within a standard drum form case, bayonet fitting front bezel and back cover, the verso centre with adjustment port. Extension post and suspension ring.
Bourdon & Richard barometers differ markedly from the common form of aneroid barometers: both essentially operate on the same principle though the execution of the mechanism is quite different. The Bourdon utilises a horseshoe-shaped capsule arranged around the outside of the mechanism – it is roughly a flat oval in section, acting on twin connecting rods driving a very finely constructed fan-shaped rack which, in turn, is engaged to a pinion set at the base of the arbour. These instruments are known for their great accuracy, sensitivity and gentle transition: in short they were the finest aneroid barometers of the 19th century.
This is in mostly good condition, some discolouration to the paper dial around the rim, the front brass ring is loose at the bottom (which can be seen in the photos for more details). It’s believe to be working but could do with a service.
If you would like to bid on this auction please follow the link below:
https://www.ebay.co.uk/itm/355530106747?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=hkvocvnmsoe&sssrc=0&ssuid=hkvocvnmsoe&var=&widget_ver=artemis&media=COPY
This will be sent via Parcelforce express 48 and dispatched within two working days. Happy to post internationally.
