Aneroid, Barometers, Conservation, History of Aneroid Barometers, Vavasseur Antiques - Antique & Vintage Aneroid Barometers, Barographs & Other Scientific Instruments | August 8, 2024
On This Day – 8th August 1908 – Wilbur Wright
On this day in 1908, Wilbur Wright publicly demonstrated a Wright aircraft for the first time in Europe at the Hunaudières racecourse at Le Mans, southwest of Paris. The airplane was an improved version of the brothers’ experimental designs flown in 1903-1905. Wilbur’s flights at Le Mans confirmed without doubt the Wrights’ claims to have developed a successful airplane and...
Aneroid, Barometers, Conservation, History of Aneroid Barometers, Vavasseur Antiques - Antique & Vintage Aneroid Barometers, Barographs & Other Scientific Instruments | May 29, 2024
Very Unusual French Hybrid Aneroid Barometer c1858
An unusual French hybrid brass open dial aneroid barometer no. 2, maker unknown c1858. Early aneroid barometer having 4¾” zinc backed printed open centre card dial with weather prognostications to outer part, the barometric scale calibrated in cms Hg, marked “Baromètre” at 6 o’clock. The open centre with a hair spring tensioned rack and pinion drive assembled onto a lacquered brass...
Aneroid, Barographs, Barometers, Conservation, History of Aneroid Barometers, How do I repair an aneroid barometer, Pressure, Restoration, Vavasseur Antiques - Antique & Vintage Aneroid Barometers, Barographs & Other Scientific Instruments, Weather | August 8, 2023
August Work in Progress
Another fine instrument of particular interest, this large barograph is something quite special, and although unsigned, is undoubtedly the work of Negretti & Zambra. Let’s examine the evidence for this. First, the instrument is listed in the Negretti & Zambra catalogue of 1910 in the section Self-Recording Aneroid Barometers: item 82, a “Self-Recording Barometer, with a tall cylinder taking a...
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, Barometers, Barometers in Action, Conservation, History of Aneroid Barometers, Pressure, Restoration, Surveying, Technology, Vavasseur Antiques - Antique & Vintage Aneroid Barometers, Barographs & Other Scientific Instruments | May 11, 2023
The Quest for Greater Resolution in Aneroid Barometers I
As marvellous an invention as the aneroid barometer was, it had many shortcomings, most of which were approached by various instrument makers over the 100 years or so of production. Resolution, perhaps expressed as the reading to the highest number of decimal places, was an illusive goal. The problem relates to the expansion and contraction of the cell over a...
Barometers in Action, Technology, Testing Barometers, Vavasseur Antiques - Antique & Vintage Aneroid Barometers, Barographs & Other Scientific Instruments | March 20, 2021
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