1955 VINTAGE BR-52 PRECISION BAKELITE BAROMETER ANEROID USSR for Sale

1955 VINTAGE BR-52 PRECISION BAKELITE BAROMETER ANEROID USSR For Sale

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1955 VINTAGE BR-52 PRECISION BAKELITE BAROMETER ANEROID USSR:
$97.00

Vintage Soviet Barometer aneroid BR-52 Weather measuring device 1955 USSRDevice In working conditionMercury and liquid barometers are the most accurate and are still used at meteorological stations. Their disadvantage is fragility, insecurity and large size.In general, barometers, depending on the principle of action, can be mercury, liquid, aneroid or electronic.- Aneroid barometer - a device whose principle of action is based on changing the size of a metal box filled with rarefied air, under the action of atmospheric pressure. Such barometers are reliable and small in size.So, the aneroid barometer is a device that is designed to measure atmospheric pressure mechanically. Structurally, the aneroid consists of a round metal (nickel-silver or hardened steel) box with corrugated (ribbed) bases, in which, by evacuating air, a strong vacuum, a return spring, a transmission mechanism and an arrow pointer are created. Under the action of atmospheric pressure: its increase or decrease, the box, respectively, is either compressed or unbent. At the same time, when compressing the bellows box, the upper flexing surface begins to pull the spring attached to it downwards, and when the atmospheric pressure decreases, the upper part, on the contrary, bends and pushes the spring upwards. An arrow is attached to the return spring using a transmission mechanism, which moves on a scale calibrated in accordance with the readings of a mercury barometer . It is worth noting that, in practice, several (up to 10 pieces) series of thin-walled corrugated boxes with a discharge are applied in series, which increases the amplitude of the arrow on the scale.Aneroid barometers, due to their small size and lack of fluid in the structure, are the most convenient and portable; they are widely used in practice.
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