US3193760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air pressure sensitive bridge
Assignee: Collins Radio Co
•
Filing: 1961-04-28
•
Granted: 1965-07-06
•
Expires: 1981-04-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Julius L Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:06
CPC Classifications
G; G01; G01L; G01L9/00; G01L9/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
104 words
A PRESSURE TRANSDUCER COMPRISING FOUR CONDENSERS, SAID CONDENSERS CONNECTED IN A BRIDGE CIRCUIT, TWO OF SAID CONDENSERS, ONE EACH IN OPPOSITE BRANCHES OF SAID BRIDGE, BEING IMMUNE TO PRESSURE VARIATIONS, THE OTHER TWO CONDENSERS IN THE OTHER OPPOSITE BRANCHES OF SAID BRIDGE HAVING DIELECTRIC CONSTANTS WHICH VARY WITH CHANGES IN PRESSURE, SAID OTHER TWO CONDENSERS BEING MOUNTED IN A HOUSING WHICH HAS A SMALL OPENING THAT ALLOWS PRESSURE VARIATIONS THAT EXIST A LONG TIME BETWEEN THE INSIDE AND OUTSIDE OF THE HOUSING TO EQUALIZE, A VOLTAGE SOURCE CONNECTED TO SAID BRIDGE CIRCUIT, AND AN OUTPUT REMOVED FROM SAID BRIDGE CIRCUIT PROPORTIONAL TO PRESSURE DEVIATIONS.
References Cited (Backward Citations)
US2614416A
Cited
US2773137A
Cited
US2714703A
Cited
US3031616A
Cited
US2996915A
Cited
US3077561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-05 | 1969-01-04 | 1969-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-05 | 1973-01-04 | 1973-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-05 | 1977-01-04 | 1977-07-06 | $7700.00 | Window Closed / Lapsed |