US3287978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical bridge circuit
Assignee: Lewis Engineering Co
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Filing: 1963-10-23
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Granted: 1966-11-29
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Expires: 1983-10-23
Abstract
No abstract record available.
Inventors
- 👤 Knud J Knudsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:40
CPC Classifications
G; G01; G01K; G01K7/00; G01K7/16; G01K7/18; G01K7/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
AN ELECTRICAL BRIDGE CIRCUIT COMPRISING, IN COMBINATION: (A) FIRST AND SECOND ADJOINING ARMS HAVING A COMMON JUNCTION FOR CONNECTION TO A VOLTAGE SOURCE, (B) SAID ARMS HAVING COMMENSURATE RESISTANCE VALUES, (C) A THIRD ARM AND A RESISTIVE TRANSDUCER HAVING A COMMON JUNCTION FOR CONNECTION TO SAID VOLTAGE SOURCE, (D) SAID THIRD AND SECOND ARMS HAVING A COMMON JUNCTION, (E) SAID TRANSDUCER COMPRISING THE FOURTH BRIDGE ARM, (F) A LINEAR POTENTIOMETER AND A SHUNT RESISTOR CONNECTED ACROSS THE ENDS OF THE POTENTIOMETER, (G) SAID SHUNT RESISTOR HAVING A VALUE TO PRODUCE A PREDETERMINED DESIRED RESISTANCE BETWEEN THE ENDS OF THE POTENTIOMETER,
Claim 2
Dependent Claim
100 words
AN ELECTRICAL BRIDGE CIRCUIT COMPRISING, IN COMBINATION: (A) FIRST AND SECOND ADJOINING ARMS HAVING A COMMON JUNCTION FOR CONNECTION TO A VOLTAGE SOURCE, (B) SAID ARMS HAVING COMMENSURATE RESISTANCE VALUES, (C) A THIRD ARM AND A RESISTIVE TRANSDUCER HAVING A COMMON JUNCTION FOR CONNECTION TO SAID VOLTAGE SOURCE, (D) SAID THIRD AND SECOND ARMS HAVING A COMMON JUNCTION, (E) SAID TRANSDUCER COMPRISING THE FOURTH BRIDGE ARM, (F) A LINEAR POTENTIOMETER AND A SHUNT RESISTOR CONNECTED ACROSS THE ENDS OF THE POTENTIOMETER, (G) SAID SHUNT RESISTOR HAVING A VALUE TO PRODUCE A PREDETERMINED DESIRED RESISTANCE BETWEEN THE ENDS OF THE POTENTIOMETER,
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) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |