US3138763A
Expired / Lapsed
US
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Measuring circuit for determining signal amplitude
Assignee: Zenith Electronics LLC
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Filing: 1959-07-23
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Granted: 1964-06-23
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Expires: 1979-07-23
Abstract
No abstract record available.
Inventors
- 👤 Melvin C Hendrickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:34
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/04; H; H03; H03M; H03M1/00; H03M1/12; H03M1/64
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
131 words
MEASURING APPARATUS FOR DETERMINING THE ABSOLUTE AMPLITUDE OF A SIGNAL IRRESPECTIVE OF ITS POLARITY, COMPRISING: A PAIR OF UNIDIRECTIONAL TRANSLATING DEVICES; MEANS FOR NORMALLY BIASING EACH OF SAID DEVICES TO ITS NON-CONDUCTING CONDITION; A SOURCE OF A FIRST CONTROL VOLTAGE OF EITHER POLARITY AND HAVING AN UNKNOWN, FIXED AMPLITUDE; MEANS FOR EFFECTIVELY APPLYING SAID FIRST CONTROL VOLTAGE TO ONE OF SAID UNIDIRECTIONAL DEVICES WITH A POLARITY TENDING TO RENDER IT CONDUCTIVE AND TO THE OTHER OF SAID DEVICES WITH A POLARITY TENDING TO MAINTAIN IT NON-CONDUCTIVE, SAID FIRST CONTROL VOLTAGE BEING INSUFFICIENT BY ITSELF TO ESTABLISH SAID ONE DEVICE IN ITS CONDUCTIVE CONDITION; A SOURCE OF A SECOND CONTROL VOLTAGE HAVING, STARTING FROM A REFERENCE INSTANT, A TRAPEZOIDAL WAVE SHAPE WITH A PORTION OF GRADUAL, RELATIVELY CONSTANT SLOPE; MEANS FOR EFFEC-
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) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |