US3273448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Analytical logarithmic ratio determination apparatus
Assignee: EIDP Inc
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Filing: 1962-12-06
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Granted: 1966-09-20
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Expires: 1982-12-06
Abstract
No abstract record available.
Inventors
- 👤 Neal B Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:35
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/24; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/31; G01N21/314; G06G7/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
APPARATUS FOR ACCUMULATING AND PROCESSING PHYSICAL DATE REQUIRED FOR A COMPARISON IN THE FORM OF AN APPROXIMATION OF THE LOG R/A AS A FUNCTION OF THE FIRST TERM, (R-A)/(R+A), OF THE SERIES EXPANSION REPRESENTATIVE OF SAID LOG R/A COMPRISING, IN COMBINATION IN SERIES ELECTRICAL CIRCUIT IN THE ORDER RECITED, MEANS GENERATING VOLTAGE PULSES IN ALTERNATION WHICH CORREPSOND TO THE QUANTITY A AND THE QUANTITY R, RESPECTIVELY, MEANS STORING INDIVIDUAL SEPARATE CAPACITIVE ELECTRICAL CHARGES OF MAGNITUDE WHICH ARE FUNCTIONS OF SAID VOLTAGE PULSES, MEANS GENERATING A D.-C. VOLTAGE SIGNAL EA WHICH IS A FUNCTION OF THE CAPACITIVE CHARGE CORRESPONDING TO SAID QUANTITY A, MEANS GENERATING A D.-C. VOLTAGE SIGNAL ER WHICH IS A FUNCTION OF THE CAPACITIVE CHARGE CORRESPONDING TO SAID QUANTITY R, MEAN COMPUTING AS ONE TERM THE DIFFERENCE (ER-EA) AND AS ANOTHER TERM THE SUM (ER+EA), MEANS COMPUTING THE RATIO (ER-EA) AS AN APPROXIMATION OF SAID LOG R/A, AND MEANS INDICATING SAID RATIO.
Claim 2
Dependent Claim
154 words
APPARATUS FOR ACCUMULATING AND PROCESSING PHYSICAL DATE REQUIRED FOR A COMPARISON IN THE FORM OF AN APPROXIMATION OF THE LOG R/A AS A FUNCTION OF THE FIRST TERM, (R-A)/(R+A), OF THE SERIES EXPANSION REPRESENTATIVE OF SAID LOG R/A COMPRISING, IN COMBINATION IN SERIES ELECTRICAL CIRCUIT IN THE ORDER RECITED, MEANS GENERATING VOLTAGE PULSES IN ALTERNATION WHICH CORREPSOND TO THE QUANTITY A AND THE QUANTITY R, RESPECTIVELY, MEANS STORING INDIVIDUAL SEPARATE CAPACITIVE ELECTRICAL CHARGES OF MAGNITUDE WHICH ARE FUNCTIONS OF SAID VOLTAGE PULSES, MEANS GENERATING A D.-C. VOLTAGE SIGNAL EA WHICH IS A FUNCTION OF THE CAPACITIVE CHARGE CORRESPONDING TO SAID QUANTITY A, MEANS GENERATING A D.-C. VOLTAGE SIGNAL ER WHICH IS A FUNCTION OF THE CAPACITIVE CHARGE CORRESPONDING TO SAID QUANTITY R, MEAN COMPUTING AS ONE TERM THE DIFFERENCE (ER-EA) AND AS ANOTHER TERM THE SUM (ER+EA), MEANS COMPUTING THE RATIO (ER-EA) AS AN APPROXIMATION OF SAID LOG R/A, AND MEANS INDICATING SAID RATIO.
References Cited (Backward Citations)
US2775160A
Cited
US2809290A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |