Patent US4074345A successfully refreshed from Google Patents.
US4074345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic power supply
Assignee: Individual
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Filing: 1976-11-02
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Granted: 1978-02-14
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Expires: 1996-11-02
Abstract
Abstract An electronic power supply utilizes a full wave bridge rectifier circuit whose alternating current voltage source is derived from a multi-primary and multi-secondary winding transformer whose windings are selectively disposed in series or parallel circuits, thereby enabling the apparatus to be effectively employed on a wide variety of A.C. voltage sources. Two adjacent legs of the bridge rectifier employ S.C.R.'s gated simultaneously symetrically by pulses obtained from a unijunction transistor driven by the output of an operational amplifier whose input terminals are coupled to voltage and current sensing networks located at the output terminals of a filter coupled to the D.C. side of the full wave bridge.
Inventors
- 👤 Walter J. Ackermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:40
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/145; H02M7/155; H02M7/1555; H02M7/1557
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
283 words
An electronic power supply comprising a full wave bridge rectifier having two adjacent legs thereof, utilizing a pair of silicone control rectifiers, said bridge rectifier having input and output terminals, a transformer having a pair of primary windings and a pair of secondary windings, first means to switch said primary windings in a series electrical circuit or a parallel circuit, second means to switch said secondary windings in a series electrical circuit or a parallel circuit independently operable of said first means, said secondary windings coupled to the input terminals of said bridge rectifier, a filter circuit including at least one series inductance and at least one shunt capacitance having input terminals and output terminals, said input terminals of said filter circuit coupled to said output terminals of said bridge rectifier, an amplifier, said amplifier having input terminals and output terminals, a voltage divider network, said voltage divider network coupled to said output terminals of said filter circuit, a pair of resistors, said pair of resistors coupled together in a series circuit in series with said input terminals of said filter circuit, said voltage divider network coupled to said input terminals of said amplifier, the juncture of said pair of resistors coupled to said input terminals of said amplifier, a uni-junction transistor, said uni-junction transistor having gate terminals and output terminals, said gate terminals of said uni-junction transistor coupled to said output terminals of said amplifier, a pulse transformer having a primary winding and a secondary winding, said primary winding of said pulse transformer coupled to said output terminals of said uni-junction transistor, said pair of silicone control rectifiers having gate terminals, said secondary of said pulse transformer coupled to said gate terminals.
Claim 2
Dependent Claim
283 words
An electronic power supply comprising a full wave bridge rectifier having two adjacent legs thereof, utilizing a pair of silicone control rectifiers, said bridge rectifier having input and output terminals, a transformer having a pair of primary windings and a pair of secondary windings, first means to switch said primary windings in a series electrical circuit or a parallel circuit, second means to switch said secondary windings in a series electrical circuit or a parallel circuit independently operable of said first means, said secondary windings coupled to the input terminals of said bridge rectifier, a filter circuit including at least one series inductance and at least one shunt capacitance having input terminals and output terminals, said input terminals of said filter circuit coupled to said output terminals of said bridge rectifier, an amplifier, said amplifier having input terminals and output terminals, a voltage divider network, said voltage divider network coupled to said output terminals of said filter circuit, a pair of resistors, said pair of resistors coupled together in a series circuit in series with said input terminals of said filter circuit, said voltage divider network coupled to said input terminals of said amplifier, the juncture of said pair of resistors coupled to said input terminals of said amplifier, a uni-junction transistor, said uni-junction transistor having gate terminals and output terminals, said gate terminals of said uni-junction transistor coupled to said output terminals of said amplifier, a pulse transformer having a primary winding and a secondary winding, said primary winding of said pulse transformer coupled to said output terminals of said uni-junction transistor, said pair of silicone control rectifiers having gate terminals, said secondary of said pulse transformer coupled to said gate terminals.
Claim 3
Dependent Claim
16 words
The electronic power supply as claimed in claim 1 wherein said voltage divider is manually adjustable.
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) | 1981-02-13 | 1981-08-15 | 1982-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-13 | 1985-08-15 | 1986-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-13 | 1989-08-15 | 1990-02-14 | $7700.00 | Window Closed / Lapsed |