Aneroid, Barometers, Barometers in Action, History of Aneroid Barometers, How do I repair an aneroid barometer, Is my barometer working, Pressure, Surveying, Technology, Testing Barometers, Vavasseur Antiques - Antique & Vintage Aneroid Barometers, Barographs & Other Scientific Instruments, Weather | August 28, 2023
Hysteresis and the Watkin Hicks Mountain Barometer
This scarce development of the aneroid barometer or altimeter, patented by Colonel H.S.S. Watkin in 1898, was born of poorly performing pressure sensing capsules. It had been known for some time that a first reading before an ascent of some high place would not agree once the observer returned to the same elevation even if the barometric pressure had not...
Aneroid, Barometers, Barometers in Action, History of Aneroid Barometers, Pressure, Restoration, Testing Barometers, Vavasseur Antiques - Antique & Vintage Aneroid Barometers, Barographs & Other Scientific Instruments | August 6, 2023
The Quest for Greater Resolution in Aneroid Barometers II
As a follow up to Patent No. 2457 lodged by Daniels, this piece is certainly of significance. The Daniels instruments sought to display greater resolution with the introduction of a geared sub-assembly greatly magnifying the small rotational movement of the primary arbor, that connected by a fine chain to the secondary lever - the result being that the main dial...
Aneroid, Barographs, Barometers, Barometers in Action, Bourdon, Compasses, Conservation, How do I repair an aneroid barometer, Is my barometer working, Pressure, Restoration, Technology, Testing Barometers, Vavasseur Antiques - Antique & Vintage Aneroid Barometers, Barographs & Other Scientific Instruments | April 28, 2023
Conservation & Restoration Services
Barometer repairs or restoration services? We undertake barometer and barograph repairs, restoration and servicing at reasonable rates. We handle aneroid and mercury barometers, barographs, and other scientific instruments. “I had two early instruments which were ‘showing their age’ and needed rejuvenating without losing any of their original looks. The team at Vavasseur would appear to live and breathe pocket instruments and I would recommend...
Aneroid, Barometers, Barometers in Action, Conservation, History of Aneroid Barometers, How do I repair an aneroid barometer, Is my barometer working, Pressure, Restoration, Testing Barometers, Vavasseur Antiques - Antique & Vintage Aneroid Barometers, Barographs & Other Scientific Instruments, Weather | April 22, 2023
Antique Pocket Hypsometers II – Hicks Hypsometer
A very rare leather cased, lacquered and oxidised brass hypsometer No 590 by J. Hicks, London, c1900 Comprising four draw telescopic top section, the third draw marked "J. Hicks, Maker, 8, 9, & 10 Hatton Garden, London, No 590," first draw with heat shroud. Spirit burner with integral pushfit end cap, threaded wick cover, wind and flame shroud with lower...
Aneroid, Barographs, Barometers, Conservation, How do I repair an aneroid barometer, Is my barometer working, Pressure, Restoration, Technology, Testing Barometers, Vavasseur Antiques - Antique & Vintage Aneroid Barometers, Barographs & Other Scientific Instruments | April 21, 2023
New Test Control Unit in Laboratory
An addition and a development of the Calibration & Flow Control Unit Mk1 The lack of availability of this equipment commercially left me with no alternative other than to design and build in-house. In any event I had my own ideas and requirements. This control unit manages a number of parameters in a readily visual way leaving aside the need...
Aneroid, Barometers, Barometers in Action, Pressure, Technology, Testing Barometers, Vavasseur Antiques - Antique & Vintage Aneroid Barometers, Barographs & Other Scientific Instruments, Weather | April 12, 2023
Antique Pocket Hypsometers I – French Hypsometer
The term 'Hypsometer' is essentially applied to a device or system, perhaps mathematically based, that enables the determination of heights or elevations. It has been applied to aneroids and various trigonometrically based instruments. In this instance we are dealing with the instrument more generally recognised as a hypsometer, in essence a device not unlike a telescope however lacking lenses, the...
Aneroid, Barographs, Barometers, Barometers in Action, Compasses, Conservation, History of Aneroid Barometers, How do I repair an aneroid barometer, Is my barometer working, Pressure, Restoration, Testing Barometers, Vavasseur Antiques - Antique & Vintage Aneroid Barometers, Barographs & Other Scientific Instruments, Weather | February 16, 2023
February Work in Progress
Many might wonder what might be next on Vavasseur Antiques. “Work in progress” is a constant state, since almost all the items we offer are comprehensively re-built, serviced, and/or benefit from conservation. Consequently through-put is sometimes slow. This does mean though that the things we offer are ‘proper,’ as described, and as original as possible, not the product of the...
Barometers in Action, Technology, Testing Barometers, Vavasseur Antiques - Antique & Vintage Aneroid Barometers, Barographs & Other Scientific Instruments | March 20, 2021
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