US3159751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clamp circuit with a shunt unilateral discharge path
Assignee: International Business Machines Corp
•
Filing: 1960-11-25
•
Granted: 1964-12-01
•
Expires: 1980-11-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles A Bogdan
- 👤 Fredric C Fitzgerald
- 👤 Richard W Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:24
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
AN ELECTRONIC CLAMP FOR USE IN COMBINATION WITH A FIRST TRANSISTOR STAGE, MEANS TO SUPPLY INPUT SIGNALS TO SAID FIRST TRANSISTOR STAGE, A SECOND TRANSISTOR STAGE, AND A CONDUCTOR AND COUPLING CAPACITOR INTERCONNECTING SAID FIRST AND SECOND STAGES COMPRISING: A SOURCE OF REFERENCE POTENTIAL, SWITCH MEANS INTERCONNECTING SAID SOURCE OF REFERENCE POTENTIAL WITH SAID CONDUCTOR AT A POINT BETWEEN SAID CAPACITOR AND SAID SECOND TRANSISTOR STAGE, SAID SWITCH MEANS APPEARING AS A HIGH IMPEDANCE ELEMENT WHEN OPEN AND AS A LOW IMPEDANCE ELEMENT WHEN CLOSED, MEANS TO PERIODICALLY ACTUATE SAID SWITCH MEANS, A UNIDIRECTIONAL LOW IMPEDANCE DISCHARGE PATH CONNECTED IN GENERALLY PARALLEL RELATION WITH RESPECT TO SAID SWITCH MEANS, SAID DISCHARGE PATH BEING CONNECTED TO SAID CONDUCTOR BETWEEN SAID CAPACITOR AND SAID SECOND TRANSISTOR STAGE, AND SAID DISCHARGE PATH DISSIPATING ANY RESIDUAL VOLTAGE ON SAID CAPACITOR WHEN SAID SWITCH MEANS IS OPENED.
Claim 2
Dependent Claim
142 words
AN ELECTRONIC CLAMP FOR USE IN COMBINATION WITH A FIRST TRANSISTOR STAGE, MEANS TO SUPPLY INPUT SIGNALS TO SAID FIRST TRANSISTOR STAGE, A SECOND TRANSISTOR STAGE, AND A CONDUCTOR AND COUPLING CAPACITOR INTERCONNECTING SAID FIRST AND SECOND STAGES COMPRISING: A SOURCE OF REFERENCE POTENTIAL, SWITCH MEANS INTERCONNECTING SAID SOURCE OF REFERENCE POTENTIAL WITH SAID CONDUCTOR AT A POINT BETWEEN SAID CAPACITOR AND SAID SECOND TRANSISTOR STAGE, SAID SWITCH MEANS APPEARING AS A HIGH IMPEDANCE ELEMENT WHEN OPEN AND AS A LOW IMPEDANCE ELEMENT WHEN CLOSED, MEANS TO PERIODICALLY ACTUATE SAID SWITCH MEANS, A UNIDIRECTIONAL LOW IMPEDANCE DISCHARGE PATH CONNECTED IN GENERALLY PARALLEL RELATION WITH RESPECT TO SAID SWITCH MEANS, SAID DISCHARGE PATH BEING CONNECTED TO SAID CONDUCTOR BETWEEN SAID CAPACITOR AND SAID SECOND TRANSISTOR STAGE, AND SAID DISCHARGE PATH DISSIPATING ANY RESIDUAL VOLTAGE ON SAID CAPACITOR WHEN SAID SWITCH MEANS IS OPENED.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |