Measuring and testing – Fluid pressure gauge – Vibration type
Patent
1978-11-22
1980-04-22
Woodiel, Donald O.
Measuring and testing
Fluid pressure gauge
Vibration type
73708, 73717, G01L 1100, G01L 1300
Patent
active
041988671
ABSTRACT:
A differential-pressure measuring instrument comprising a main body assembly with a pair of diaphragms each subject to a respective fluid pressure. The diaphragms enclose a sealed chamber containing a fill-liquid surrounding a non-magnetic vibratable wire which is tensioned in accordance with the applied differential pressure. A magnetic field passes transversely through the wire, and electrical current is supplied to the wire by electronic circuit means to produce a vibratory force on the wire as a result of interaction between the electrical current and the magnetic field.
REFERENCES:
patent: 2087494 (1937-07-01), Annin
patent: 3140613 (1964-07-01), Hasegawa
patent: 3393565 (1968-07-01), Klee
patent: 3990309 (1976-11-01), Beckwith et al.
The Foxboro Company
Woodiel Donald O.
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