US3750298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas gauges
Assignee: United Kingdom Atomic Energy Authority
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Filing: 1970-10-21
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Granted: 1973-08-07
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Expires: 1990-10-21
Abstract
Abstract A gas gauge for measuring strain of a specimen comprising a conduit for constraining a flow of gas and first and second gas flow restricting orifice members located in the conduit. The second member being located on the downstream side of the first member and a tapered throttling needle adapted to contact the specimen is arranged such that axial movement of the needle regulates the flow of gas through the orifice in the second member. The gas pressures upstream of said first member and downstream of the second member are measured and changes in the pressure in the region of the conduit between the first and second members are also to provide an indication measured of the strain of the specimen.
Inventors
- 👤 E Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:08
CPC Classifications
G; G01; G01B; G01B5/00; G01B5/30; Y; Y10; Y10S; Y10S33/00; Y10S33/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
130 words
A gas gauge for measuring strain of a specimen comprising a conduit for constraining a flow of gas, first and second gas flow restricting orifice members located in the conduit, the second member being located on the downstream side of the first member, means for regulating the flow of gas through the orifice in the second member in response to strain movement of the specimen comprising a specimen engaging needle which is axially moveable in said conduit in response to strain movement of the specimen and which has a tapered throttling section which registers in the orifice in the second member, and means to measure the gas pressures upstream of said first member, downstream of second member, and in the region of the conduit between the first and second members.
Claim 2
Dependent Claim
130 words
A gas gauge for measuring strain of a specimen comprising a conduit for constraining a flow of gas, first and second gas flow restricting orifice members located in the conduit, the second member being located on the downstream side of the first member, means for regulating the flow of gas through the orifice in the second member in response to strain movement of the specimen comprising a specimen engaging needle which is axially moveable in said conduit in response to strain movement of the specimen and which has a tapered throttling section which registers in the orifice in the second member, and means to measure the gas pressures upstream of said first member, downstream of second member, and in the region of the conduit between the first and second members.
Claim 3
Dependent Claim
18 words
A gauge according to claim 1 wherein the throttling section of the needle has a parobolic shaped profile.
Claim 4
Dependent Claim
65 words
A gauge according to claim 1 wherein a bush is movably mounted in the conduit between the first and second members to enable the bush to move axially in the conduit relative to the needle, and the needle comprises a tapered nose section which registers in the restricting orifice in the second member, a shoulder portion, and a shank portion which registers in the bush.
Claim 5
Dependent Claim
32 words
A gauge according To claim 3 wherein biassing means are provided to urge the needle into contact with the specimen, said biassing means also serving to position the bush in the conduit.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |