BELLOW DIFFERENTIAL PRESSURE GAUGE Russian patent published in 1994 - IPC

FIELD: measurement technology. SUBSTANCE: bellows pressure gauge has hermetically sealed housing 1 with bellows 2 with movable cover 3 fitted inside, and also two inlet connections 4 and 5. First connection communicates with housing space, second, with space of bellows 2. Bellows movements are converted into electric signal by transducer made in form of loop of resilient thread 6 made of current-carrying rubber and placed in insulating sheath 7 made of resilient flexible material. Bent part of loop of thread 6 is rigidly connected by end 8 with bellows cover 3. Ends of thread 6 are passed through wall 9 of housing 1 by means of sheath 7 which serves as sealing insulator, and washer 10. Ends of thread are connected to inputs of ohmmeter 13. End 8 of thread 6 is insulated from movable cover 3 by sheath 7 and washer 14. Halves of thread 6 are insulated from each other by insulating gasket 15 made of resilient flexible material. EFFECT: enhanced reliability of measurement. 1 dwg