Patent US3321699A successfully refreshed from Google Patents.
US3321699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for quadratically converting a linear displacement into an electrical quantity
Assignee: Laboratorium voor Instrumentatie Datawell NV
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Filing: 1964-09-15
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Granted: 1967-05-23
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Expires: 1984-09-15
Abstract
No abstract record available.
Inventors
- 👤 Petrus J Rademakers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:27
CPC Classifications
H; H01; H01G; H01G4/00; G; G01; G01P; G01P15/00; G01P15/02; G01P15/08; H01C; H01C10/00; H01C10/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A DEVICE FOR CONVERTING A DISPLACEMENT INTO AN ELECTRICAL QUANTITY SO ARRANGED THAT THE ELECTRICAL QUANTITY VARIES WITH THE SQUARE OF THE DISPLACEMENT, COMPRISING A FIRST ELECTRODE AND A SECOND ELECTRODE SPACED APART AND FACING EACH OTHER, A HOLE PROVIDED IN SAID FIRST ELECTRODE, AND A THIRD ELECTRODE HAVING AN ELONGATE FORM AND A UNIFORM CROSS-SECTION PERPENDICULAR TO ITS LENGTH, SAID THIRD ELECTRODE BEING POSITIONED WITHIN SAID HOLE AND HAVING A PORTION THEREOF EXTENDING ON EITHER SIDE OF SAID FIRST ELECTRODE, MOUNTING MEANS FOR SAID THIRD ELECTRODE PERMITTING SAID ELECTRODE TO BE DISPLACED FOR A LIMITED DISTANCE IN THE DIRECTION OF ITS LENGTH WITH RESPECT TO SAID FIRST ELECTRODE, ELECTRICAL CONNECTING MEANS MOUNTED ON EACH OF SAID ELECTRODES, A VOLTAGE SOURCE CONNECTED TO SAID FIRST AND SECOND ELECTRODES, AND OUTPUT TERMINALS ONE CONNECTED TO SAID THIRD ELECTRODE AND ANOTHER CONNECTED TO ONE OF SAID FIRST AND SECOND ELECTRODES.
Claim 2
Independent Claim
148 words
A DEVICE FOR CONVERTING A DISPLACEMENT INTO AN ELECTRICAL QUANTITY SO ARRANGED THAT THE ELECTRICAL QUANTITY VARIES WITH THE SQUARE OF THE DISPLACEMENT, COMPRISING A FIRST ELECTRODE AND A SECOND ELECTRODE SPACED APART AND FACING EACH OTHER, A HOLE PROVIDED IN SAID FIRST ELECTRODE, AND A THIRD ELECTRODE HAVING AN ELONGATE FORM AND A UNIFORM CROSS-SECTION PERPENDICULAR TO ITS LENGTH, SAID THIRD ELECTRODE BEING POSITIONED WITHIN SAID HOLE AND HAVING A PORTION THEREOF EXTENDING ON EITHER SIDE OF SAID FIRST ELECTRODE, MOUNTING MEANS FOR SAID THIRD ELECTRODE PERMITTING SAID ELECTRODE TO BE DISPLACED FOR A LIMITED DISTANCE IN THE DIRECTION OF ITS LENGTH WITH RESPECT TO SAID FIRST ELECTRODE, ELECTRICAL CONNECTING MEANS MOUNTED ON EACH OF SAID ELECTRODES, A VOLTAGE SOURCE CONNECTED TO SAID FIRST AND SECOND ELECTRODES, AND OUTPUT TERMINALS ONE CONNECTED TO SAID THIRD ELECTRODE AND ANOTHER CONNECTED TO ONE OF SAID FIRST AND SECOND ELECTRODES.
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) | 1970-05-22 | 1970-11-21 | 1971-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-22 | 1974-11-21 | 1975-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-22 | 1978-11-21 | 1979-05-23 | $7700.00 | Window Closed / Lapsed |