PNEUMATIC DEVICE MEASURING LINEAR DIMENSIONS Russian patent published in 1998 - IPC

FIELD: measurement technology, accurate measurement of linear dimensions and movements. SUBSTANCE: pneumatic device measuring linear dimensions includes indicating glass tube 1 with float 2 and reading scale 3, ejector 4 with inlet 5 of high-pressure gas, inlet 6 of low- pressure gas and outlet 7, relief cock 8, cock 9 for release of air into atmosphere, throttling cock 10, adjustable throttle 11, measuring equipment 12 communicating through cock 8 and conduit 13 with inlet of device, through conduit 14 with outlet of tube 1, through conduit 15 and throttle 11 with inlet 6 of ejector 4. Expansion of measurement range with simultaneous reduction of flow rate of air through device and preservation of high measurement accuracy within entire range are achieved in device by installation of throttling cock 10 in conduit 14 of low-pressure gas on axis 17 common with cock 8 in opposition to each other for simultaneous movement by one control drive 16 as well as by inclination of part 14a of conduit 14 located behind cock 10 towards measurement equipment 12 and formation of angle less than 90 deg at point of connection with conduit 13. EFFECT: expanded measurement range. 2 cl, 1 dwg