BAROMETER Russian patent published in 1999 - IPC

FIELD: instrumentation. SUBSTANCE: invention can find use in design of meters of atmospheric pressure of industrial and home assignment. Barometer has reservoir with gas to which capillary tube with end bent upwards is joined, with oil indicator and pressure scale as well as compensator of temperature errors. Reservoir is manufactured in the form of bellows with bottom. Hollow cylinder is positioned inside bellows and is attached leak-tight to free edge of bellows over perimeter. Piston along which axis end of capillary tube communicating through space of cylinder with space of bellows is located inside cylinder. Compensator of temperature errors is fabricated in the form of temperature-sensitive material deposited on surface of bellows. With variation of ambient temperature volume of bellows grows as much as volume of gas atmosphere in it varies during heating which ensures compensation for temperature errors under automatic mode. EFFECT: simplified design and increased handling convenience. 2 dwg