US3296867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manometer
Assignee: SCHWIEN ENG Inc
•
Filing: 1964-11-02
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Granted: 1967-01-10
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Expires: 1984-11-02
Abstract
No abstract record available.
Inventors
- 👤 Schwien Leo Nevin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:01
CPC Classifications
G; G01; G01L; G01L9/00; G01L9/0091; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2409; Y10T137/2452
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
IN A MANOMETER HAVING INTERCONNECTED FIRST AND SECOND CISTERNS CARRYING POOLS OF MERCURY WITH ONE OF SAID CISTERNS DISPOSED VERTICALLY RELATIVE TO THE OTHER, A FIRST PRESSURE SOURCE CONNECTED TO THE UPPER CISTERN ABOVE THE POOL, A PRESSURE LINE CONNECTED TO THE LOWER CISTERN ABOVE THE POOL, AND MEANS FOR GENERATING AN ERROR SIGNAL VARYING AS A FUNCTION OF UNBALANCE AT THE FIRST AND SECOND CISTERNS, THE IMPROVEMENT COMPRISING: A CHAMBER INTERCONNECTED WITH SAID FIRST AND SECOND CISTERNS AND HAVING A MOVABLE WALL MEMBER; DRIVE MEANS FOR MOVING ONE OF SAID CISTERNS VERTICALLY RELATIVE TO THE OTHER; AND MEANS FOR GENERATING A CONTROL SIGNAL FOR ENERGIZING SAID DRIVE MEANS WITH SAID CONTROL SIGNAL VARYING AS A FUNCTION OF THE MOVEMENT OF SAID MOVABLE WALL MEMBER AND OF SAID ERROR SIGNAL.
Claim 2
Dependent Claim
130 words
IN A MANOMETER HAVING INTERCONNECTED FIRST AND SECOND CISTERNS CARRYING POOLS OF MERCURY WITH ONE OF SAID CISTERNS DISPOSED VERTICALLY RELATIVE TO THE OTHER, A FIRST PRESSURE SOURCE CONNECTED TO THE UPPER CISTERN ABOVE THE POOL, A PRESSURE LINE CONNECTED TO THE LOWER CISTERN ABOVE THE POOL, AND MEANS FOR GENERATING AN ERROR SIGNAL VARYING AS A FUNCTION OF UNBALANCE AT THE FIRST AND SECOND CISTERNS, THE IMPROVEMENT COMPRISING: A CHAMBER INTERCONNECTED WITH SAID FIRST AND SECOND CISTERNS AND HAVING A MOVABLE WALL MEMBER; DRIVE MEANS FOR MOVING ONE OF SAID CISTERNS VERTICALLY RELATIVE TO THE OTHER; AND MEANS FOR GENERATING A CONTROL SIGNAL FOR ENERGIZING SAID DRIVE MEANS WITH SAID CONTROL SIGNAL VARYING AS A FUNCTION OF THE MOVEMENT OF SAID MOVABLE WALL MEMBER AND OF SAID ERROR SIGNAL.
References Cited (Backward Citations)
US3134262A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |