US3094874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underwater depth gauge
Assignee: Individual
•
Filing: 1959-04-15
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Granted: 1963-06-25
•
Expires: 1979-04-15
Abstract
No abstract record available.
Inventors
- 👤 Edward W Rolle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:03
CPC Classifications
G; G01; G01C; G01C13/00; G01C13/008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
AN UNDERWATER HYDROSTATIC PRESSURE GAUGE UNEFFECTED BY WATER TEMPERATURE VARIATIONS COMPRISING A CAPILLARY TUBE CLOSED AT ONE END AND OPEN AT THE OTHER END THEREOF, A RESILIENT RESERVOIR COMPLETELY FILLED WITH LIQUID MERCURY, SAID CAPILLARY TUBE BEING COMPLETELY FILLED WITH HELIUM GAS, SAID OPEN END OF SAID TUBE INSERTED IN SAID RESERVOIR, SAID LIQUID MERCURY AND SAID HELIUM GAS BEING IN DIRECT CONTACT, THE RATIO OF THE TUBE CAVITY VOLUME FILLED WITH HELIUM GAS AND THE RESERVOIR CAVITY VOLUME FILLED WITH MERCURY BEING PROVIDED IN RELATIVE SIZES IN INVERSE PROPORTION TO THE RATIO OF THE THERMAL COEFFICIENTS OF EXPANSION OF SAID GAS AND SAID LIQUID, SAID RESERVOIR AND TUBE BEING ENCAPSULATED WITHIN A TRANSPARENT HOUSING, A DIAPHRAGM AREA ON SAID RESERVOIR EXPOSED THROUGH AN EXTERNAL PRESSURE PASSAGE IN SAID HOUSING TO THE LIQUID HYDROSTATIC PRESSURE HEAD TO BE MEASURED, AND INDICIA MEANS ASSOCIATED WITH SAID TUBE FOR LINEARLY INDICATING THE HYDROSTATIC PRESSURE HEAD.
Claim 2
Dependent Claim
153 words
AN UNDERWATER HYDROSTATIC PRESSURE GAUGE UNEFFECTED BY WATER TEMPERATURE VARIATIONS COMPRISING A CAPILLARY TUBE CLOSED AT ONE END AND OPEN AT THE OTHER END THEREOF, A RESILIENT RESERVOIR COMPLETELY FILLED WITH LIQUID MERCURY, SAID CAPILLARY TUBE BEING COMPLETELY FILLED WITH HELIUM GAS, SAID OPEN END OF SAID TUBE INSERTED IN SAID RESERVOIR, SAID LIQUID MERCURY AND SAID HELIUM GAS BEING IN DIRECT CONTACT, THE RATIO OF THE TUBE CAVITY VOLUME FILLED WITH HELIUM GAS AND THE RESERVOIR CAVITY VOLUME FILLED WITH MERCURY BEING PROVIDED IN RELATIVE SIZES IN INVERSE PROPORTION TO THE RATIO OF THE THERMAL COEFFICIENTS OF EXPANSION OF SAID GAS AND SAID LIQUID, SAID RESERVOIR AND TUBE BEING ENCAPSULATED WITHIN A TRANSPARENT HOUSING, A DIAPHRAGM AREA ON SAID RESERVOIR EXPOSED THROUGH AN EXTERNAL PRESSURE PASSAGE IN SAID HOUSING TO THE LIQUID HYDROSTATIC PRESSURE HEAD TO BE MEASURED, AND INDICIA MEANS ASSOCIATED WITH SAID TUBE FOR LINEARLY INDICATING THE HYDROSTATIC PRESSURE HEAD.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-24 | 1966-12-24 | 1967-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-24 | 1970-12-24 | 1971-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-24 | 1974-12-24 | 1975-06-25 | $7700.00 | Window Closed / Lapsed |