US3458730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monostable controlled rectifier switching circuit with variable impedance for low power dissipation and rapid recovery
Assignee: International Business Machines Corp
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Filing: 1966-06-03
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Granted: 1969-07-29
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Expires: 1986-06-03
Abstract
No abstract record available.
Inventors
- 👤 Rodger L Gamblin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:25
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/72; H03K17/73
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A CIRCUIT FOR ENERGIZING A LOAD WITH HIGH ENERGY PULSES OF SHORT TIME DURATION OF THE TYPE: IN WHICH FIRST AND SECOND SILICON-CONTROLLED RECTIFIERS ARE CONNECTED FOR SEQUENTIAL ENERGIZATION TO MOMENTARILY ENERGIZE THE LOAD OVER A SERIES PATH INCLUDING THE FIRST RECTIFIER, AND IN WHICH MEANS, INCLUDING A CAPACITOR COUPLED TO SIMILAR ELECTRODES OF THE RECTIFIERS, IS EFFECTIVE TO APPLY A TURN-OFF PULSE TO EACH RECTIFIER INCIDENT TO THE INTIAL TURN-ON OF THE OTHER RECTIFIER, THE CIRCUIT BEING CHARACTERIZED BY: A VARIABLE IMPEDANCE ELEMENT IN SERIES WITH THE SECOND RECTIFIER AND CONNECTED FOR OPERATION IN ITS HIGH IMPEDANCE STATE WHILE THE FIRST RECTIFIER IS NONCONDUCTING TO MINIMIZE POWER DRAIN THROUGH THE SECOND RECTIFIER, AND FOR OPERATION IN ITS LOW IMPEDANCE STATE WHILE THE FIRST RECTIFIER IS CONDUCTING FOR RAPIDLY CONDITIONING THE CAPACITOR FOR SUBSEQUENT TURNING OFF OF THE LATTER RECTIFIER.
Claim 2
Dependent Claim
140 words
A CIRCUIT FOR ENERGIZING A LOAD WITH HIGH ENERGY PULSES OF SHORT TIME DURATION OF THE TYPE: IN WHICH FIRST AND SECOND SILICON-CONTROLLED RECTIFIERS ARE CONNECTED FOR SEQUENTIAL ENERGIZATION TO MOMENTARILY ENERGIZE THE LOAD OVER A SERIES PATH INCLUDING THE FIRST RECTIFIER, AND IN WHICH MEANS, INCLUDING A CAPACITOR COUPLED TO SIMILAR ELECTRODES OF THE RECTIFIERS, IS EFFECTIVE TO APPLY A TURN-OFF PULSE TO EACH RECTIFIER INCIDENT TO THE INTIAL TURN-ON OF THE OTHER RECTIFIER, THE CIRCUIT BEING CHARACTERIZED BY: A VARIABLE IMPEDANCE ELEMENT IN SERIES WITH THE SECOND RECTIFIER AND CONNECTED FOR OPERATION IN ITS HIGH IMPEDANCE STATE WHILE THE FIRST RECTIFIER IS NONCONDUCTING TO MINIMIZE POWER DRAIN THROUGH THE SECOND RECTIFIER, AND FOR OPERATION IN ITS LOW IMPEDANCE STATE WHILE THE FIRST RECTIFIER IS CONDUCTING FOR RAPIDLY CONDITIONING THE CAPACITOR FOR SUBSEQUENT TURNING OFF OF THE LATTER RECTIFIER.
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) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |