Patent US4433251A successfully refreshed from Google Patents.
US4433251A
Expired / Lapsed
US
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Power supply circuitry
Assignee: Dennison Manufacturing Co
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Filing: 1981-09-21
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Granted: 1984-02-21
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Expires: 2001-09-21
Abstract
Abstract A power supply circuit suitable for driving a solenoid or similar electronic device. The circuit provides high pulse current, low duty cycle drive signals over wide output voltage and current ranges. The circuit advantageously employs a silicon controlled rectifier to control the recharging current to an output storage capacitor. The use of an SCR as the controlling device provides high efficiency with precise line regulation.
Inventors
- 👤 William D. Banks
- 👤 Frank G. Bond
- 👤 Raymond L. Naylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:29
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/72; H03K17/73; H03K17/731
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
109 words
Improved drive circuitry of the type including an electrical storage element, means for routing electrical energy from said electrical storage element to a load during "on" periods, and means for recharging said electrical storage element during intervening "off" periods, a time-varying potential, a silicon controlled rectifier for receiving said time-varying potential and delivering a recharging current to said electrical storage element, and a threshold regulating means for establishing a predetermined voltage at the gate of said silicon controlled rectifier, wherein the improvement comprises an improved threshold regulating means for said silicon controlled rectifier comprising a zener diode, and means for providing an essentially constant current through said zener diode.
Claim 2
Dependent Claim
109 words
Improved drive circuitry of the type including an electrical storage element, means for routing electrical energy from said electrical storage element to a load during "on" periods, and means for recharging said electrical storage element during intervening "off" periods, a time-varying potential, a silicon controlled rectifier for receiving said time-varying potential and delivering a recharging current to said electrical storage element, and a threshold regulating means for establishing a predetermined voltage at the gate of said silicon controlled rectifier, wherein the improvement comprises an improved threshold regulating means for said silicon controlled rectifier comprising a zener diode, and means for providing an essentially constant current through said zener diode.
Claim 3
Dependent Claim
23 words
Apparatus as defined in claim 1, wherein the means for providing an essentially constant current comprises a further zener diode, and a transistor.
Claim 4
Dependent Claim
19 words
Apparatus as defined in claim 1, further comprising voltage adjustment means for providing precise variation of said predetermined voltage.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-02-20 | 1987-08-22 | 1988-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-20 | 1991-08-22 | 1992-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-20 | 1995-08-22 | 1996-02-21 | $7700.00 | Window Closed / Lapsed |