Patent US3203223A successfully refreshed from Google Patents.
US3203223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bridge-type transducer with absolute calibration outputs
Assignee: Fairchild Semiconductor Corp
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Filing: 1963-05-20
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Granted: 1965-08-31
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Expires: 1983-05-20
Abstract
No abstract record available.
Inventors
- 👤 Petrow Serge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:02
CPC Classifications
G; G01; G01L; G01L25/00; G01L1/00; G01L1/20; G01L1/22; G01L1/2268; G01R; G01R1/00; G01R1/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
MEANS FOR PROVIDING AN ABSOLUTE CALIBRATION OUTPUT FROM A BRIDGE-TYPE TRANSDUCER HAVING DIRECT CURRENT VOLTAGE EXCITATION APPLIED ACROSS ONE DIAGONAL OF THE BRIDGE AND OUTPUT TERMINALS COUPLED TO THE OPPOSITE ENDS OF THE OTHER DIAGONAL OF THE BRIDGE, COMPRISING FIRST AND SECOND ELECTRONIC SWITCH MEANS RESPECTIVELY SERIALLY CONNECTED TO SAID OUTPUT TERMINALS AND NORMALLY CONDUCTING IN RESPONSE TO VOLTAGE SIGNALS AT SAID OUTPUT TERMINALS TO TRANSMIT SAID SIGNALS THEREFROM WHILE BEING NONCONDUCTING IN RESPONSE TO VOLTAGES AT THE DISTAL SIDES OF THE SWITCH MEANS RELATIVE TO SAID OUTPUT TERMINALS OF GREATER MAGNITUDE THAN THE MAXIMUM VOLTAGE SIGNALS WHICH CAN EXIST AT SAID OUTPUT TERMINALS, A CALIBRATION RESISTANCE, THIRD AND FOURTH ELECTRONIC SWITCH MEANS CONNECTING SAID CALIBRATION RESISTANCE BETWEEN SAID DISTAL SIDES OF SAID FIRST AND SECOND ELECTRONIC SWITCH MEANS, SAID THIRD AND FOURTH ELECTRONIC SWITCH MEANS NORMALLY NONCONDUCTING IN RESPONSE TO VOLTAGES AT THE RESPECTIVE JUNCTURES THEREOF WITH SAID FIRST AND SECOND SWITCH MEANS HAVING MAGNITUDES IN THE RANGE OF SAID
Claim 2
Dependent Claim
161 words
MEANS FOR PROVIDING AN ABSOLUTE CALIBRATION OUTPUT FROM A BRIDGE-TYPE TRANSDUCER HAVING DIRECT CURRENT VOLTAGE EXCITATION APPLIED ACROSS ONE DIAGONAL OF THE BRIDGE AND OUTPUT TERMINALS COUPLED TO THE OPPOSITE ENDS OF THE OTHER DIAGONAL OF THE BRIDGE, COMPRISING FIRST AND SECOND ELECTRONIC SWITCH MEANS RESPECTIVELY SERIALLY CONNECTED TO SAID OUTPUT TERMINALS AND NORMALLY CONDUCTING IN RESPONSE TO VOLTAGE SIGNALS AT SAID OUTPUT TERMINALS TO TRANSMIT SAID SIGNALS THEREFROM WHILE BEING NONCONDUCTING IN RESPONSE TO VOLTAGES AT THE DISTAL SIDES OF THE SWITCH MEANS RELATIVE TO SAID OUTPUT TERMINALS OF GREATER MAGNITUDE THAN THE MAXIMUM VOLTAGE SIGNALS WHICH CAN EXIST AT SAID OUTPUT TERMINALS, A CALIBRATION RESISTANCE, THIRD AND FOURTH ELECTRONIC SWITCH MEANS CONNECTING SAID CALIBRATION RESISTANCE BETWEEN SAID DISTAL SIDES OF SAID FIRST AND SECOND ELECTRONIC SWITCH MEANS, SAID THIRD AND FOURTH ELECTRONIC SWITCH MEANS NORMALLY NONCONDUCTING IN RESPONSE TO VOLTAGES AT THE RESPECTIVE JUNCTURES THEREOF WITH SAID FIRST AND SECOND SWITCH MEANS HAVING MAGNITUDES IN THE RANGE OF SAID
References Cited (Backward Citations)
US2504965A
Cited
US3060379A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |