US3244000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic diode pressure transducer and system
Assignee: Systems Research Laboratories Inc
•
Filing: 1960-12-20
•
Granted: 1966-04-05
•
Expires: 1980-12-20
Abstract
No abstract record available.
Inventors
- 👤 James W Ballard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:44
CPC Classifications
G; G01; G01P; G01P5/00; G01P5/14; G01P1/00; G01P1/006; G01P15/00; G01P15/02; G01P15/08; Y; Y10; Y10T; Y10T137/00; Y10T137/1842; Y10T137/1939; Y10T137/1963; Y10T137/2012
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
A TRANSDUCER SYSTEM COMPRISING A PLURALITY OF PRESSURE RESPONSIVE DIODE DEVICES HAVING REPRODUCIBLE, LINEAR PRESSURE CURRENT CHARACTERISTICS WITHINA TEMPERATURE OPERATING RANGE OF -75* C. TO 400* C. INCLUDING, PRESSURE DISPLACEABLE PLATE MEANS AND CATHODE MENS, STATIC PRESSURE SENSING MEANS OPERATIVELY CONNECTED TO A FIRST AND SECOND OF SAID DIODE DEVICES, DYNAMIC PRESSURE SENSING MEANS OPERATIVELY CONNECTED TO A THIRD OF SAID DIODE DEVICES, MEANS FOR APPLYING DIFFERENT PLATE POTENTIALS ACROSS THE CATHODE MEANS AND PLATE MEANS OF THE RESPECTIVE DIODE DEVICES, TEMPERATURE COMPENSATING ADJUSTMENT MEANS OPERATIVELY CONNECTED TO THE FIRST OF SAID TWO STATIC PRESSURE SENSING DIODE DEVICES FOR VARYING THE PLATE CURRENT CHARACTERISTIC THEREOF, ALTITUDE INDICATING AMMETER MEANS OPERATIVELY CONNECTED TO SAID TWO DIODE DEVICES FOR INDICATING TEMPERATURE CORRECTED STATIC PRESSURE BY MEASURING DIFFERENTIAL PLATE CURRENTS OF SAID TWO DIODE DEVICES, AIR SPEED INDICATING AMMETER MEANS OPERATIVELY CONNECTED TO THE SECOND STATIC PRESSURE SENSING DIODE DEVICE AND THE THIRD DYNAMIC PRESSURE SENSING DIODE DEVICE FOR INDICATING STATIC PRESSURE CORRECTED AIR SPEED BY MEASURING DIFFERENTIAL PLATE CURRENT OF SAID SECOND AND THIRD DIODE DEVICES.
Claim 2
Dependent Claim
174 words
A TRANSDUCER SYSTEM COMPRISING A PLURALITY OF PRESSURE RESPONSIVE DIODE DEVICES HAVING REPRODUCIBLE, LINEAR PRESSURE CURRENT CHARACTERISTICS WITHINA TEMPERATURE OPERATING RANGE OF -75* C. TO 400* C. INCLUDING, PRESSURE DISPLACEABLE PLATE MEANS AND CATHODE MENS, STATIC PRESSURE SENSING MEANS OPERATIVELY CONNECTED TO A FIRST AND SECOND OF SAID DIODE DEVICES, DYNAMIC PRESSURE SENSING MEANS OPERATIVELY CONNECTED TO A THIRD OF SAID DIODE DEVICES, MEANS FOR APPLYING DIFFERENT PLATE POTENTIALS ACROSS THE CATHODE MEANS AND PLATE MEANS OF THE RESPECTIVE DIODE DEVICES, TEMPERATURE COMPENSATING ADJUSTMENT MEANS OPERATIVELY CONNECTED TO THE FIRST OF SAID TWO STATIC PRESSURE SENSING DIODE DEVICES FOR VARYING THE PLATE CURRENT CHARACTERISTIC THEREOF, ALTITUDE INDICATING AMMETER MEANS OPERATIVELY CONNECTED TO SAID TWO DIODE DEVICES FOR INDICATING TEMPERATURE CORRECTED STATIC PRESSURE BY MEASURING DIFFERENTIAL PLATE CURRENTS OF SAID TWO DIODE DEVICES, AIR SPEED INDICATING AMMETER MEANS OPERATIVELY CONNECTED TO THE SECOND STATIC PRESSURE SENSING DIODE DEVICE AND THE THIRD DYNAMIC PRESSURE SENSING DIODE DEVICE FOR INDICATING STATIC PRESSURE CORRECTED AIR SPEED BY MEASURING DIFFERENTIAL PLATE CURRENT OF SAID SECOND AND THIRD DIODE DEVICES.
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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) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |