US3577060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alternating current power supply employing programmed turn-on and turn-off
Assignee: Philips North America LLC
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Filing: 1969-03-10
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Granted: 1971-05-04
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Expires: 1989-03-10
Abstract
Abstract A reliability of a high-power alternating power supply wherein a low-power alternating current is used to convert a high-power direct current to said high-power alternating current is improved, when driven by sources and when driving loads that are inductive or inductively coupled, by the use of a programmed turn-on and turnoff procedure wherein the energy supplied to a reactive load is gradually increased and diminished respectively.
Inventors
- 👤 William E Richeson Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:22
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H02M3/337; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/53; H02M7/537
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
171 words
In an alternating current power supply having a clock, a source of direct current power and an alternating current generator, the improvement comprising: first means for gradually increasing the direct current power on turn-on of the power supply; second means for gradually diminishing the direct current power on turnoff of the power supply; said first and said second means having a shared energy storage means whose rate of charging defines said gradual increase and whose rate of discharge determines said gradual diminution; said first and said second means having a shared switching means operative on energy storage to energize the direct current power supply and operative on turnoff to deenergize the direct current power supply, said switching means comprising a relay and a silicon-controlled rectifier wherein said relay when energized allows the silicon-controlled rectifier to be triggered and when deenergized prohibits the silicon-controlled rectifier from being triggered; and means for maintaining in operation the clock and the alternating current generator while one of said first and said second means is operative.
Claim 2
Dependent Claim
171 words
In an alternating current power supply having a clock, a source of direct current power and an alternating current generator, the improvement comprising: first means for gradually increasing the direct current power on turn-on of the power supply; second means for gradually diminishing the direct current power on turnoff of the power supply; said first and said second means having a shared energy storage means whose rate of charging defines said gradual increase and whose rate of discharge determines said gradual diminution; said first and said second means having a shared switching means operative on energy storage to energize the direct current power supply and operative on turnoff to deenergize the direct current power supply, said switching means comprising a relay and a silicon-controlled rectifier wherein said relay when energized allows the silicon-controlled rectifier to be triggered and when deenergized prohibits the silicon-controlled rectifier from being triggered; and means for maintaining in operation the clock and the alternating current generator while one of said first and said second means is operative.
Claim 3
Dependent Claim
25 words
The improvement of claim 1 wherein said alternating current generator comprises a plurality of electron current devices which operate alternately at one of two states.
Claim 4
Dependent Claim
13 words
The improvement of claim 6 wherein the two states are nonconduction and saturation.
Claim 5
Dependent Claim
23 words
The improvement of claim 2 further comprising means for insuring that said electron current devices are adequately driven during said increase and diminution.
Claim 6
Dependent Claim
15 words
The improvement of claim 4 wherein said means for insuring comprises an energy storage element.
Claim 7
Dependent Claim
177 words
In an alternating current power supply having a clock, a source of direct current power and an alternating current generator, the improvement comprising: first means for gradually increasing the direct current power on turn-on of the power supply; second means for gradually diminishing the direct current power on turnoff of the power supply; said first and said second means having a shared energy storage means whose rate of charging defines said gradual increase and whose rate of discharge determines said gradual diminution; said first and said second means having a shared switching means operative on turn-on to energize the direct current power supply and operative on turnoff to deenergize the direct current power supply, said switching means comprising a first switching device and a second switching device wherein said first switching device when energized allows the second switching device to be triggered and when deenergized prohibits the second switching device from being triggered; and means for maintaining in operation the clock and the alternating current generator while one of said first and said second means is operative.
Claim 8
Dependent Claim
177 words
In an alternating current power supply having a clock, a source of direct current power and an alternating current generator, the improvement comprising: first means for gradually increasing the direct current power on turn-on of the power supply; second means for gradually diminishing the direct current power on turnoff of the power supply; said first and said second means having a shared energy storage means whose rate of charging defines said gradual increase and whose rate of discharge determines said gradual diminution; said first and said second means having a shared switching means operative on turn-on to energize the direct current power supply and operative on turnoff to deenergize the direct current power supply, said switching means comprising a first switching device and a second switching device wherein said first switching device when energized allows the second switching device to be triggered and when deenergized prohibits the second switching device from being triggered; and means for maintaining in operation the clock and the alternating current generator while one of said first and said second means is operative.
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) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |