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Clocks & Scientific Instruments/Barometers - 17 result(s)

The word ‘aneroid’ derives from the Greek meaning ‘without liquid’. Consequently, the aneroid barometer is virtually trouble free in comparison to the mercury barometers which, due to their open end glass tubes filled with mercury, are notoriously difficult to transport.
Nicolas Conté invented the aneroid barometer in 1798 but it wasn’t until 1844 that Lucien Vidi’s design was patented by Pierre Armande La Conte de Fontainemoreau (no. 10157). Further development soon made the aneroid barometer the standard type of barometer used on ships, in the home, and in mountaineering. In 1851 Vidi’s barometer was awarded a Council Medal at the Great Exhibition in London. (Mike Jukes - Antiques Dealer at Hemswell)

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Carved Mahogany Yacht Clock and Barometer With Thermometer, Working Order, Circa 1890
Dim: W-30.5 D-8 H-19 (cm)
Price: £190.00
   
Rope Edged Aneroid Barometer With Silvered 8” Dial, engraved Bush Opticians Hull
Dim: W-27 D-7 (cm)
Price: £175.00
   
Black Forest Carved Wooden Griffin Head Barometer
Dim: W-34 H-79 (cm)
Price: £185.00
   
Carved Foliate Oak Cased Aneroid Banjo Barometer With 8” Porcelain Dial and 10” Porcelain Thermometer Scale, Guaranteed for 12 months, Circa 1890
Dim: W-34 H-84 (cm)
Price: £345.00
 
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An Aneroid Movement In a Carved Oak Case with Printed Glass Dials Manufactured in Britain. Cleaned and Checked, in Good Working Order
Dim: W-25 H-80 (cm)
Price: £195.00
   
Solid Oak Case with an Aneroid Movement, Painted Glass Scales and Mercury Thermometer. C1890.Tested in Good Working Order
Dim: W-25 H-84 (cm)
Price: £270.00
   
Victorian Oak Aneroid Barometer, serviced and tested.
Dim: W-39 D-10 H-32 (cm)
Price: £275.00
   
Edwardian Oak Barometer, fully serviced and tested
Dim: W-24 (cm)
Price: £110.00
 
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Edwardian Inlaid Mahogany Barometer
Dim: W-20 H-71 (cm)
Price: £165.00
   
Silver Travel barometer HM Asprey of London 1933 Free from personal inscriptions
Dim: W-6.5 D-2 (cm)
Price: £885.00
   
Unusual “lufft”, weather station Barometer , thermometer, hydrometer and compass
Dim: W-12 D-12 H-18 (cm)
Price: £225.00
   
Brass Pocket Barometer in Case, Fully Working.
Dim: W-8.5 H-3.5 (cm)
Price: £240.00
 
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Aneroid Banjo Barometer with Etched Silvered 8 inch Dial and 10 inch Mercury Thermometer Scale Plate mounted in an Art Nouveau Oak Case, Circa 1910, Serviced and Guaranteed for 12 months.
Dim: W-32 D-8 H-86 (cm)
Price: £195.00
   
Heavy Oak Barometer with Porcelain Dials, Good Working Order, Circa 1890s.
Dim: W-33 D-9 H-108 (cm)
Price: £550.00
   
Edwardian Aneroid Barometer in a Turned Oak Case. Signed R.L Rennison of Sunderland.Tested and in Working Order.
Dim: W-29 D-8 (cm)
Price: £145.00
   
Surveyors Barometer Manufactured by Short and Mason for Architects and Engineers Supply Co. Kansas City Mo. Scale 26-31 Inches and Altitude Scale 0-5,000ft. In Great Condition. Gilding has a very Litt...
Dim: W-7 H-9.5 (cm)
Price: £295.00
 
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Oak Barometer with Engraved Dials. Good Quality Carvings. Full Working Order. 1900's.
Dim: W-35.5 D-6 H-103 (cm)
Price: £245.00
             
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Aneroid mechanisms are inherently robust and have a notable longevity as demonstrated by the many early barometers that are still accurately functioning today. The standard mechanism of an aneroid barometer consists of a flexible evacuated capsule held apart by an external spring. With changes in atmospheric pressure the capsule will expand or contract creating a movement of the spring. This movement is transmitted through linkages to produce rotation of a spindle to which an indicating hand is attached. When the barometer is set up the indicating hand shows the atmospheric pressure at sea level.
The barometer readings will vary at different heights above sea level measures due to the changes in pressure. Thus, if it were taken to a higher altitude it would read a lower pressure and vice versa. The barometer is set up by use of a screw on the rear of the instrument. Turning this screw causes the indicating needle to move around the dial allowing it to be set to the sea level atmospheric pressure.
Although weather conditions are controlled by a combination of atmospheric pressure, humidity, wind direction and temperature a definite trend in the weather can be obtained from an aneroid barometer. The setting hand should be placed over the indicating hand by using the knob in the centre of the glass face. If, after a period of time (normally several hours), the indicating hand has moved away from the setting hand the weather trend can be read from the dial. If no movement has occurred then the barometer indicating needle shows the prevailing weather conditions. (Mike Jukes - Antiques Dealer at Hemswell)