antik.it/Antique-measuring-instruments/7981-Altimeter/
Code 7981
EUR 500.00
In stock
1727191650Code 7981 AltimeterCompensated brass barometric altimeter signed Stanley London n.1581 from the early 1900s. Diameter 7.6 x 3 cm – 3x1.2 inches.
The altimeter is an instrument that allows you to measure the height of a body above sea level and the ground below. Altimeters are based on the principle, discovered by Pascal, that atmospheric pressure decreases with increasing altitude, so essentially they are barometers equipped with a graduated metric scale. The most used altimeter is a normal aneroid metal barometer which has, alongside the pressure scale in millimeters of mercury or millibars, a height scale calibrated in meters or feet; in fact, atmospheric pressure decreases as the height above sea level increases.
William Stanley 1829-1909 The son of a mechanical engineer, he began working with his father in 1849, immediately making improvements to technical drawings and simultaneously creating new instruments. The study of drawing tools was adapted to the needs of the industrial revolution. All over the world, sectors of activity such as surveyor, engineer, architect and navigator were expanding at an ever-increasing rate. Surveys were made of vast areas, such as the Indian continent, while nautical charts of huge tracts of ocean were charted. This climate of innovation led William Stanley to open his first workshop in Holborn London in 1854, for the production of drawing instruments.
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Antique measuring instruments
Code 7981 Altimeter
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