Measuring and testing – Fluid pressure gauge – Electrical
Patent
1989-06-13
1991-07-23
Orsino, Joseph A.
Measuring and testing
Fluid pressure gauge
Electrical
73708, 310319, G01L 2112
Patent
active
050333062
ABSTRACT:
A vacuum gauge for measuring pressure of environmental gas includes a quartz resonator disposed in the gas, and undergoing oscillation having a resonant frequency dependent on its body temperature which is dependent on relatively low pressure and having a resonant current which is dependent on relatively high pressure. Heat source is disposed adjacent to the resonator for supplying heat to the resonator so as to maintain the body temperature thereof and resonant frequency thereof according to the pressure of environmental gas, and producing an first output signal representative of value of the pressure in relatively low pressure range. A converter converts the resonant current of resonator into a corresponding second output signal representative of value of the pressure in relatively high pressure range. A meter indicates the value of pressure according to the first and second output signals.
REFERENCES:
patent: 3580081 (1971-05-01), Greenberg et al.
patent: 4197752 (1980-04-01), Block
patent: 4471661 (1984-09-01), Edwards, Jr.
patent: 4541286 (1985-09-01), Holme
patent: 4633717 (1987-01-01), Scholl
patent: 4684842 (1987-08-01), Maruno et al.
patent: 4729242 (1988-03-01), Reich et al.
patent: 4741213 (1988-05-01), Hojoh
patent: 4747311 (1988-05-01), Hojoh
patent: 4959999 (1990-10-01), Tamura
J. Phys. E. Sci. Instrum (GB), vol. 5, No. 5, May 1972 W. Steckelmacher et al.
Journal of Vacuum Science & Technology A, vol. 4, No. 3, Part II, Second Series, May/Jun. 1986, pp. 1728-1731, Ono et al.
Adams Bruce L.
Orsino Joseph A.
Seiko Electronic Components Ltd.
Swarthout Brent A.
Wilks Van C.
LandOfFree
Quartz vacuum gauge does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Quartz vacuum gauge, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quartz vacuum gauge will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-425207