US3580075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure transducer for ionizable fluids
Assignee: Corning Glass Works
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Filing: 1967-07-31
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Granted: 1971-05-25
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Expires: 1987-07-31
Abstract
Abstract A pressure transducer for ionizable fluids having no vibrating or moving parts and capable of reliable operation at high ambient temperatures is disclosed. The driving fluid to be detected is introduced into a space between a pair of electrodes across which an ionizing electrical potential exists. Ionic current flow between the transducer electrodes is a function of the instantaneous density of the driving fluid within the interelectrode space and produces corresponding current and voltage drops in an external circuit of sufficient intensity to drive detectors, amplifiers, or a variety of electrical instruments.
Inventors
- 👤 David R Steinberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:24
CPC Classifications
G; G01; G01L; G01L21/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
115 words
In a system for determining the temperature of a high temperature region, said system being of the type wherein a high temperature ionizable gas is directed to a fluid oscillator which causes said fluid to vibrate, the frequency of said vibrations being related to the temperature of said gas, and wherein a transducer converts said vibrations into an electrical signal, said transducer being characterized in that it comprises first and second electrodes, means for supporting said electrodes in such a manner that they are spaced with respect to one another, means for providing an electrical potential difference between said electrodes, and output means for providing an indication of the electrical currents flowing between said electrodes.
Claim 2
Dependent Claim
115 words
In a system for determining the temperature of a high temperature region, said system being of the type wherein a high temperature ionizable gas is directed to a fluid oscillator which causes said fluid to vibrate, the frequency of said vibrations being related to the temperature of said gas, and wherein a transducer converts said vibrations into an electrical signal, said transducer being characterized in that it comprises first and second electrodes, means for supporting said electrodes in such a manner that they are spaced with respect to one another, means for providing an electrical potential difference between said electrodes, and output means for providing an indication of the electrical currents flowing between said electrodes.
Claim 3
Dependent Claim
37 words
The system of claim 1 wherein said first electrode consists of a cold cathode and said second electrode consists of an anode and wherein said supporting means consists of a refractory material capable of withstanding high temperatures.
Claim 4
Dependent Claim
32 words
The system of claim 2 wherein said output means comprises a resistor connected in series with said electrodes and said electrical potential means, and utilization means connected in parallel with said resistor.
Claim 5
Dependent Claim
65 words
The system of claim 2 wherein said output means comprises a resistor in series with said electrodes and said electrical potential means, a parallel L-C tuned circuit adapted to resinate at the frequency of said electrical currents, connected between said electrodes, and utilization means connected to said tuned circuit for sensing at least one desired electrical property of the voltage developed across said tuned circuit.
Claim 6
Dependent Claim
62 words
The system of claim 1 wherein said pair of electrodes comprise a hollow cylindrically shaped electrode, and a solid cylindrically shaped electrode, at least a portion of which projects into said hollow electrode, the longitudinal axis of which coincides with the longitudinal axis of said hollow electrode, and the diameter of which is less than the inside diameter of said hollow electrode.
Claim 7
Dependent Claim
13 words
The system of claim 1 wherein said pair of electrodes comprise parallel plates.
Claim 8
Dependent Claim
94 words
A pressure transducer for high teMperature ionizable fluids comprising a nonconductive disc, a solid cylindrical electrode extending through said disc and protruding beyond at least one surface of said disc, the longitudinal axis of said solid electrode coinciding with that of said disc, a hollow cylindrical electrode surrounding that portion of said solid electrode which protrudes from said disc, one end of said hollow electrode contacting said disc, said electrodes being separated by a gap, said ionizable fluid entering the end of said hollow cylinder opposite that which is in contact with said disc.
Claim 9
Dependent Claim
94 words
A pressure transducer for high teMperature ionizable fluids comprising a nonconductive disc, a solid cylindrical electrode extending through said disc and protruding beyond at least one surface of said disc, the longitudinal axis of said solid electrode coinciding with that of said disc, a hollow cylindrical electrode surrounding that portion of said solid electrode which protrudes from said disc, one end of said hollow electrode contacting said disc, said electrodes being separated by a gap, said ionizable fluid entering the end of said hollow cylinder opposite that which is in contact with said disc.
Claim 10
Dependent Claim
27 words
The pressure transducer of claim 7 which further includes a flanged portion extending from said disc, said hollow cylindrical electrode being securely supported within said flanged portion.
Claim 11
Dependent Claim
41 words
The pressure transducer of claim 8 wherein said solid cylindrical electrode constitutes a cold cathode, said hollow cylindrical electrode consists of an anode, and wherein said disc and said flanged portion consists of a refractory material capable of withstanding high temperatures.
Claim 12
Dependent Claim
43 words
The pressure transducer of claim 9 which further comprises a voltage source and a resistor connected in series, the combination of which is connected across said hollow and said solid electrodes, and means connected to said resistor for detecting electrical currents flowing therethrough.
Claim 13
Dependent Claim
63 words
The pressure transducer of claim 10 wherein said means for detecting electrical currents flowing through said resistor comprises a parallel L-C tuned circuit adapted to resonant at the frequency of said electrical currents, connected in parallel with said resistor, and utilization means connected to said tuned circuit for sensing at least one desired electrical property of the voltage developed across said tuned circuit.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |