US3140406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for detecting the sense of variation of an electrical potential
Assignee: International Business Machines Corp
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Filing: 1960-05-04
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Granted: 1964-07-07
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Expires: 1980-05-04
Abstract
No abstract record available.
Inventors
- 👤 Leonard H Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:52
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/08; G06F; G06F7/00; G06F7/06; G11; G11B; G11B5/00; G11B5/02; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2101; Y10T74/2102
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
APPARATUS FOR DETECTING THE SENSE OF VARIATION OF AN ELECTRICAL POTENTIAL, COMPRISING A TRANSISTOR HAVING INPUT, OUTPUT AND COMMON ELECTRODES, AND IMPEDANCES BETWEEN SAID ELECTRODES, A CAPACITOR, FIRST AND SECOND JUNCTIONS, MEANS INCLUDING THE INPUT AND COMMON ELECTRODES CONNECTING THE CAPACITOR AND THE INPUT-COMMON IMPEDANCE OF THE TRANSISTOR IN SERIES BETWEEN SAID JUNCTIONS, AN ASYMMETRICALLY CONDUCTIVE DEVICE CONNECTED IN PARALLEL WITH THE INPUT-COMMON IMPEDANCE AND POLED OPPOSITELY WITH RESPECT THERETO, INPUT MEANS FOR APPLYING AN INPUT SIGNAL HAVING AN ALTERNATING COMPONENT BETWEEN SAID JUNCTIONS, SAID INPUT MEANS BEING EFFECTIVE TO SEND A SUBSTANTIAL CURRENT THROUGH SAID INPUT-COMMON IMPEDANCE AND TURN THE TRANSISTOR ON ONLY WHEN THE CHARGE ON THE CAPACITOR IS VARYING IN A PREDETERMINED SENSE, AND OUTPUT MEANS CONNECTED TO THE OUTPUT ELECTRODE OF THE TRANSISTOR.
Claim 2
Dependent Claim
127 words
APPARATUS FOR DETECTING THE SENSE OF VARIATION OF AN ELECTRICAL POTENTIAL, COMPRISING A TRANSISTOR HAVING INPUT, OUTPUT AND COMMON ELECTRODES, AND IMPEDANCES BETWEEN SAID ELECTRODES, A CAPACITOR, FIRST AND SECOND JUNCTIONS, MEANS INCLUDING THE INPUT AND COMMON ELECTRODES CONNECTING THE CAPACITOR AND THE INPUT-COMMON IMPEDANCE OF THE TRANSISTOR IN SERIES BETWEEN SAID JUNCTIONS, AN ASYMMETRICALLY CONDUCTIVE DEVICE CONNECTED IN PARALLEL WITH THE INPUT-COMMON IMPEDANCE AND POLED OPPOSITELY WITH RESPECT THERETO, INPUT MEANS FOR APPLYING AN INPUT SIGNAL HAVING AN ALTERNATING COMPONENT BETWEEN SAID JUNCTIONS, SAID INPUT MEANS BEING EFFECTIVE TO SEND A SUBSTANTIAL CURRENT THROUGH SAID INPUT-COMMON IMPEDANCE AND TURN THE TRANSISTOR ON ONLY WHEN THE CHARGE ON THE CAPACITOR IS VARYING IN A PREDETERMINED SENSE, AND OUTPUT MEANS CONNECTED TO THE OUTPUT ELECTRODE OF THE TRANSISTOR.
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) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |