Measuring and testing – Fluid pressure gauge – Vibration type
Patent
1987-02-09
1988-05-03
Woodiel, Donald O.
Measuring and testing
Fluid pressure gauge
Vibration type
73384, 310361, 310370, G01L 1100, H01L 4104
Patent
active
047412135
ABSTRACT:
The present invention deals with a quartz-type gas pressure gauge which utilizes resonance of a quartz vibrator that changes depending upon the pressure, wherein the quartz vibrator is of the type of tuning fork obtained from a Z-plate of quartz crystal that is cut at an angle of greater than 1.degree.50' with respect to the Y-axis, in order to prevent the occurrence of erroneous measurement that will be caused by the change of ambient temperature particularly in low pressure regions.
REFERENCES:
patent: 4638664 (1987-01-01), Tamura
Adams Bruce L.
Seiko Instruments & Electronics Ltd.
Wilks Van C.
Woodiel Donald O.
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